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CERTFR-2026-AVI-0589

Vulnerability from certfr_avis - Published: 2026-05-13 - Updated: 2026-05-13

Une vulnérabilité a été découverte dans Exim. Elle permet à un attaquant de provoquer un problème de sécurité non spécifié par l'éditeur.

Solutions

Se référer au bulletin de sécurité de l'éditeur pour l'obtention des correctifs (cf. section Documentation).

Impacted products

	Vendor	Product	Description
	Exim	Exim	Exim versions postérieures ou égales à 4.97 et antérieures à 4.99.3

References

Title

Publication Time

Tags

Bulletin de sécurité Exim Security-2026-05-01.1

2026-05-12

vendor-advisory

Show details on source website

JSON

To clipboard

{
  "$ref": "https://www.cert.ssi.gouv.fr/openapi.json",
  "affected_systems": [
    {
      "description": "Exim versions post\u00e9rieures ou \u00e9gales \u00e0 4.97 et ant\u00e9rieures \u00e0 4.99.3",
      "product": {
        "name": "Exim",
        "vendor": {
          "name": "Exim",
          "scada": false
        }
      }
    }
  ],
  "affected_systems_content": "",
  "content": "## Solutions\n\nSe r\u00e9f\u00e9rer au bulletin de s\u00e9curit\u00e9 de l\u0027\u00e9diteur pour l\u0027obtention des correctifs (cf. section Documentation).",
  "cves": [],
  "initial_release_date": "2026-05-13T00:00:00",
  "last_revision_date": "2026-05-13T00:00:00",
  "links": [],
  "reference": "CERTFR-2026-AVI-0589",
  "revisions": [
    {
      "description": "Version initiale",
      "revision_date": "2026-05-13T00:00:00.000000"
    }
  ],
  "risks": [
    {
      "description": "Non sp\u00e9cifi\u00e9 par l\u0027\u00e9diteur"
    }
  ],
  "summary": "Une vuln\u00e9rabilit\u00e9 a \u00e9t\u00e9 d\u00e9couverte dans Exim. Elle permet \u00e0 un attaquant de provoquer un probl\u00e8me de s\u00e9curit\u00e9 non sp\u00e9cifi\u00e9 par l\u0027\u00e9diteur.",
  "title": "Vuln\u00e9rabilit\u00e9 dans Exim ",
  "vendor_advisories": [
    {
      "published_at": "2026-05-12",
      "title": "Bulletin de s\u00e9curit\u00e9 Exim Security-2026-05-01.1",
      "url": "https://exim.org/static/doc/security/EXIM-Security-2026-05-01.1/EXIM-Security-2026-05-01.1.txt"
    }
  ]
}

CERTFR-2026-AVI-0524

Vulnerability from certfr_avis - Published: 2026-04-30 - Updated: 2026-04-30

De multiples vulnérabilités ont été découvertes dans Exim. Elles permettent à un attaquant de provoquer un déni de service à distance, une atteinte à la confidentialité des données et un problème de sécurité non spécifié par l'éditeur.

Solutions

Se référer au bulletin de sécurité de l'éditeur pour l'obtention des correctifs (cf. section Documentation).

Impacted products

	Vendor	Product	Description
	Exim	Exim	Exim versions antérieures à 4.99.2

References

Title

Publication Time

Tags

Bulletin de sécurité Exim cve-2026-04.1

2026-04-30

vendor-advisory

Show details on source website

JSON

To clipboard

{
  "$ref": "https://www.cert.ssi.gouv.fr/openapi.json",
  "affected_systems": [
    {
      "description": "Exim versions ant\u00e9rieures \u00e0 4.99.2",
      "product": {
        "name": "Exim",
        "vendor": {
          "name": "Exim",
          "scada": false
        }
      }
    }
  ],
  "affected_systems_content": "",
  "content": "## Solutions\n\nSe r\u00e9f\u00e9rer au bulletin de s\u00e9curit\u00e9 de l\u0027\u00e9diteur pour l\u0027obtention des correctifs (cf. section Documentation).",
  "cves": [
    {
      "name": "CVE-2026-40685",
      "url": "https://www.cve.org/CVERecord?id=CVE-2026-40685"
    },
    {
      "name": "CVE-2026-40684",
      "url": "https://www.cve.org/CVERecord?id=CVE-2026-40684"
    },
    {
      "name": "CVE-2026-40686",
      "url": "https://www.cve.org/CVERecord?id=CVE-2026-40686"
    },
    {
      "name": "CVE-2026-40687",
      "url": "https://www.cve.org/CVERecord?id=CVE-2026-40687"
    }
  ],
  "initial_release_date": "2026-04-30T00:00:00",
  "last_revision_date": "2026-04-30T00:00:00",
  "links": [],
  "reference": "CERTFR-2026-AVI-0524",
  "revisions": [
    {
      "description": "Version initiale",
      "revision_date": "2026-04-30T00:00:00.000000"
    }
  ],
  "risks": [
    {
      "description": "D\u00e9ni de service \u00e0 distance"
    },
    {
      "description": "Non sp\u00e9cifi\u00e9 par l\u0027\u00e9diteur"
    },
    {
      "description": "Atteinte \u00e0 la confidentialit\u00e9 des donn\u00e9es"
    }
  ],
  "summary": "De multiples vuln\u00e9rabilit\u00e9s ont \u00e9t\u00e9 d\u00e9couvertes dans Exim. Elles permettent \u00e0 un attaquant de provoquer un d\u00e9ni de service \u00e0 distance, une atteinte \u00e0 la confidentialit\u00e9 des donn\u00e9es et un probl\u00e8me de s\u00e9curit\u00e9 non sp\u00e9cifi\u00e9 par l\u0027\u00e9diteur.",
  "title": "Multiples vuln\u00e9rabilit\u00e9s dans Exim",
  "vendor_advisories": [
    {
      "published_at": "2026-04-30",
      "title": "Bulletin de s\u00e9curit\u00e9 Exim cve-2026-04.1",
      "url": "https://www.exim.org/static/doc/security/cve-2026-04.1/"
    }
  ]
}

CERTFR-2025-AVI-0244

Vulnerability from certfr_avis - Published: 2025-03-27 - Updated: 2025-03-27

Une vulnérabilité a été découverte dans Exim. Elle permet à un attaquant de provoquer une élévation de privilèges.

Solutions

Se référer au bulletin de sécurité de l'éditeur pour l'obtention des correctifs (cf. section Documentation).

Impacted products

	Vendor	Product	Description
	Exim	Exim	Exim versions 4.96 à 4.98.x antérieures à 4.98.2

References

Title

Publication Time

Tags

Bulletin de sécurité Exim CVE-2025-30232

2025-03-26

vendor-advisory

Show details on source website

JSON

To clipboard

{
  "$ref": "https://www.cert.ssi.gouv.fr/openapi.json",
  "affected_systems": [
    {
      "description": "Exim versions 4.96 \u00e0 4.98.x ant\u00e9rieures \u00e0 4.98.2",
      "product": {
        "name": "Exim",
        "vendor": {
          "name": "Exim",
          "scada": false
        }
      }
    }
  ],
  "affected_systems_content": "",
  "content": "## Solutions\n\nSe r\u00e9f\u00e9rer au bulletin de s\u00e9curit\u00e9 de l\u0027\u00e9diteur pour l\u0027obtention des correctifs (cf. section Documentation).",
  "cves": [
    {
      "name": "CVE-2025-30232",
      "url": "https://www.cve.org/CVERecord?id=CVE-2025-30232"
    }
  ],
  "initial_release_date": "2025-03-27T00:00:00",
  "last_revision_date": "2025-03-27T00:00:00",
  "links": [],
  "reference": "CERTFR-2025-AVI-0244",
  "revisions": [
    {
      "description": "Version initiale",
      "revision_date": "2025-03-27T00:00:00.000000"
    }
  ],
  "risks": [
    {
      "description": "\u00c9l\u00e9vation de privil\u00e8ges"
    }
  ],
  "summary": "Une vuln\u00e9rabilit\u00e9 a \u00e9t\u00e9 d\u00e9couverte dans Exim. Elle permet \u00e0 un attaquant de provoquer une \u00e9l\u00e9vation de privil\u00e8ges.",
  "title": "Vuln\u00e9rabilit\u00e9 dans Exim",
  "vendor_advisories": [
    {
      "published_at": "2025-03-26",
      "title": "Bulletin de s\u00e9curit\u00e9 Exim CVE-2025-30232",
      "url": "https://www.exim.org/static/doc/security/CVE-2025-30232.txt"
    }
  ]
}

CERTFR-2025-AVI-0157

Vulnerability from certfr_avis - Published: 2025-02-24 - Updated: 2025-02-24

Une vulnérabilité a été découverte dans Exim. Elle permet à un attaquant de provoquer une exécution de code arbitraire à distance.

Solutions

Se référer au bulletin de sécurité de l'éditeur pour l'obtention des correctifs (cf. section Documentation).

Impacted products

	Vendor	Product	Description
	Exim	Exim	Exim versions 4.98.x antérieures à 4.98.1

References

Title

Publication Time

Tags

Bulletin de sécurité Exim CVE-2025-26794

2025-02-21

vendor-advisory

Show details on source website

JSON

To clipboard

{
  "$ref": "https://www.cert.ssi.gouv.fr/openapi.json",
  "affected_systems": [
    {
      "description": "Exim versions 4.98.x ant\u00e9rieures \u00e0 4.98.1",
      "product": {
        "name": "Exim",
        "vendor": {
          "name": "Exim",
          "scada": false
        }
      }
    }
  ],
  "affected_systems_content": "",
  "content": "## Solutions\n\nSe r\u00e9f\u00e9rer au bulletin de s\u00e9curit\u00e9 de l\u0027\u00e9diteur pour l\u0027obtention des correctifs (cf. section Documentation).",
  "cves": [
    {
      "name": "CVE-2025-26794",
      "url": "https://www.cve.org/CVERecord?id=CVE-2025-26794"
    }
  ],
  "initial_release_date": "2025-02-24T00:00:00",
  "last_revision_date": "2025-02-24T00:00:00",
  "links": [],
  "reference": "CERTFR-2025-AVI-0157",
  "revisions": [
    {
      "description": "Version initiale",
      "revision_date": "2025-02-24T00:00:00.000000"
    }
  ],
  "risks": [
    {
      "description": "Ex\u00e9cution de code arbitraire \u00e0 distance"
    }
  ],
  "summary": "Une vuln\u00e9rabilit\u00e9 a \u00e9t\u00e9 d\u00e9couverte dans Exim. Elle permet \u00e0 un attaquant de provoquer une ex\u00e9cution de code arbitraire \u00e0 distance.",
  "title": "Vuln\u00e9rabilit\u00e9 dans Exim",
  "vendor_advisories": [
    {
      "published_at": "2025-02-21",
      "title": "Bulletin de s\u00e9curit\u00e9 Exim CVE-2025-26794",
      "url": "https://www.exim.org/static/doc/security/CVE-2025-26794.txt"
    }
  ]
}

CVE-2026-45185 (GCVE-0-2026-45185)

Vulnerability from nvd – Published: 2026-05-12 00:00 – Updated: 2026-05-14 03:55

Summary

Exim before 4.99.3, in certain GnuTLS configurations, has a remotely reachable use-after-free in the BDAT body parsing path. It is triggered when a client sends a TLS close_notify mid-body during a CHUNKING transfer, followed by a final cleartext byte on the same TCP connection. This can lead to heap corruption. An unauthenticated network attacker exploiting this vulnerability could execute arbitrary code.

Severity ?

9.8 (Critical)


                        
                          CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

CWE

CWE-416 - Use After Free

Assigner

mitre

References

7 references

URL	Tags
https://exim.org
https://code.exim.org/exim/wiki/wiki/EximSecurity
https://exim.org/static/doc/security/CVE-2026-45185.txt
https://xbow.com/blog/dead-letter-cve-2026-45185-…
https://news.ycombinator.com/item?id=48111748
https://www.openwall.com/lists/oss-security/2026/…
https://exim.org/static/doc/security/EXIM-Securit…

Impacted products

1 product

Vendor	Product	Version
Exim	Exim	Affected: 4.97 , < 4.99.3 (custom)

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
      {
        "providerMetadata": {
          "dateUpdated": "2026-05-13T01:36:58.116Z",
          "orgId": "af854a3a-2127-422b-91ae-364da2661108",
          "shortName": "CVE"
        },
        "references": [
          {
            "url": "http://www.openwall.com/lists/oss-security/2026/05/12/25"
          }
        ],
        "title": "CVE Program Container"
      },
      {
        "metrics": [
          {
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              "content": {
                "id": "CVE-2026-45185",
                "options": [
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                    "Exploitation": "none"
                  },
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                    "Automatable": "yes"
                  },
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                    "Technical Impact": "total"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-05-13T00:00:00+00:00",
                "version": "2.0.3"
              },
              "type": "ssvc"
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          }
        ],
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          "dateUpdated": "2026-05-14T03:55:55.967Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
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          "product": "Exim",
          "vendor": "Exim",
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              "status": "affected",
              "version": "4.97",
              "versionType": "custom"
            }
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      "metrics": [
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            "baseScore": 9.8,
            "baseSeverity": "CRITICAL",
            "confidentialityImpact": "HIGH",
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          "url": "https://xbow.com/blog/dead-letter-cve-2026-45185-xbow-found-rce-exim"
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          "url": "https://news.ycombinator.com/item?id=48111748"
        },
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          "url": "https://www.openwall.com/lists/oss-security/2026/05/12/4"
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  "cveMetadata": {
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    "datePublished": "2026-05-12T00:00:00.000Z",
    "dateReserved": "2026-05-10T00:00:00.000Z",
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  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

CVE-2026-40687 (GCVE-0-2026-40687)

Vulnerability from nvd – Published: 2026-04-30 00:00 – Updated: 2026-05-01 14:25

Summary

In Exim before 4.99.2, when the SPA authentication driver is used with an adversarial SPA resource, there can be an out-of-bounds write that crashes the connection instance, or erroneous data processing that divulges data from uninitialized heap memory.

Severity ?

4.8 (Medium)


                        
                          CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:L

CWE

CWE-909 - Missing Initialization of Resource

Assigner

mitre

References

4 references

URL	Tags
https://www.openwall.com/lists/oss-security/2026/…
https://exim.org/static/doc/security/cve-2026-04.…
https://code.exim.org/exim/exim/commit/68b963b9f7…
https://exim.org/static/doc/security/CVE-2026-40687.txt

Impacted products

1 product

Vendor	Product	Version
Exim	Exim	Affected: 0 , < 4.99.2 (semver)

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2026-40687",
                "options": [
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                  },
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                "timestamp": "2026-05-01T14:25:03.813157Z",
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        },
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      ],
      "metrics": [
        {
          "cvssV3_1": {
            "attackComplexity": "HIGH",
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CVE-2026-40686 (GCVE-0-2026-40686)

Vulnerability from nvd – Published: 2026-04-30 00:00 – Updated: 2026-05-01 14:27

Summary

In Exim before 4.99.2, when utf8 operators are enabled, there is an out-of-bounds read if large UTF-8 trailing characters are present (malformed UTF-8 header data). Information might be divulged within an error message produced during handling of an unrelated e-mail message.

Severity ?

3.7 (Low)


                        
                          CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N

CWE

CWE-125 - Out-of-bounds Read

Assigner

mitre

References

4 references

URL	Tags
https://www.openwall.com/lists/oss-security/2026/…
https://exim.org/static/doc/security/cve-2026-04.…
https://code.exim.org/exim/exim/commit/f2570bde16…
https://exim.org/static/doc/security/CVE-2026-40686.txt

Impacted products

1 product

Vendor	Product	Version
Exim	Exim	Affected: 0 , < 4.99.2 (semver)

Show details on NVD website

JSON

To clipboard

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CVE-2026-40685 (GCVE-0-2026-40685)

Vulnerability from nvd – Published: 2026-04-30 00:00 – Updated: 2026-05-01 14:26

Summary

In Exim before 4.99.2, when JSON lookup is enabled, an out-of-bounds heap write can occur when a JSON operator encounters malformed JSON in an untrusted header, because of an incorrect implementation of \ skipping.

Severity ?

6.5 (Medium)


                        
                          CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:H

CWE

CWE-684 - Incorrect Provision of Specified Functionality

Assigner

mitre

References

4 references

URL	Tags
https://www.openwall.com/lists/oss-security/2026/…
https://exim.org/static/doc/security/cve-2026-04.…
https://code.exim.org/exim/exim/commit/9fdc057e71…
https://exim.org/static/doc/security/CVE-2026-40685.txt

Impacted products

1 product

Vendor	Product	Version
Exim	Exim	Affected: 0 , < 4.99.2 (semver)

Show details on NVD website

JSON

To clipboard

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CVE-2026-40684 (GCVE-0-2026-40684)

Vulnerability from nvd – Published: 2026-04-30 00:00 – Updated: 2026-05-01 17:22

Summary

In Exim before 4.99.2, on systems using musl libc (not glibc), an attacker can crash the connection instance when malformed DNS data is present in PTR records. This is caused by a dn_expand oddity in octal printing.

Severity ?

5.9 (Medium)


                        
                          CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H

CWE

CWE-684 - Incorrect Provision of Specified Functionality

Assigner

mitre

References

4 references

URL	Tags
https://www.openwall.com/lists/oss-security/2026/…
https://exim.org/static/doc/security/cve-2026-04.…
https://code.exim.org/exim/exim/commit/628bbaca76…
https://exim.org/static/doc/security/CVE-2026-40684.txt

Impacted products

1 product

Vendor	Product	Version
Exim	Exim	Affected: 0 , < 4.99.2 (semver)

Show details on NVD website

JSON

To clipboard

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CVE-2025-67896 (GCVE-0-2025-67896)

Vulnerability from nvd – Published: 2025-12-14 04:00 – Updated: 2025-12-18 23:04

Summary

Exim before 4.99.1, with certain non-default rate-limit configurations, allows a remote heap-based buffer overflow because database records are cast directly to internal structures without validation.

Severity ?

7 (High)


                        
                          CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:H/A:L

CWE

CWE-122 - Heap-based Buffer Overflow

Assigner

mitre

References

3 references

URL	Tags
https://www.openwall.com/lists/oss-security/2025/…
https://exim.org/static/doc/security/
https://exim.org/static/doc/security/EXIM-Securit…

Impacted products

1 product

Vendor	Product	Version
Exim	Exim	Affected: 4.99 , < 4.99.1 (custom)

Show details on NVD website

JSON

To clipboard

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CVE-2025-30232 (GCVE-0-2025-30232)

Vulnerability from nvd – Published: 2025-03-27 00:00 – Updated: 2025-03-28 14:37

Summary

A use-after-free in Exim 4.96 through 4.98.1 could allow users (with command-line access) to escalate privileges.

Severity ?

8.1 (High)


                        
                          CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:H

CWE

CWE-416 - Use After Free

Assigner

mitre

References

1 reference

URL	Tags
https://www.exim.org/static/doc/security/CVE-2025…

Impacted products

1 product

Vendor	Product	Version
Exim	Exim	Affected: 4.96 , < 4.98.2 (custom)

Show details on NVD website

JSON

To clipboard

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CVE-2025-26794 (GCVE-0-2025-26794)

Vulnerability from nvd – Published: 2025-02-21 00:00 – Updated: 2025-12-18 18:21

Summary

Exim 4.98 before 4.98.1, when SQLite hints and ETRN serialization are used, allows remote SQL injection. (Resolving SQL injection requires an update to 4.99.1 in certain non-default rate-limit configurations.)

Severity ?

7.5 (High)


                        
                          CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

CWE

CWE-89 - Improper Neutralization of Special Elements used in an SQL Command ('SQL Injection')

Assigner

mitre

References

8 references

URL	Tags
https://exim.org
https://github.com/Exim/exim/wiki/EximSecurity
https://www.exim.org/static/doc/security/CVE-2025…
https://code.exim.org/exim/exim/commit/bfe32b5c6e…
https://bugzilla.suse.com/show_bug.cgi?id=1237424
https://github.com/NixOS/nixpkgs/pull/383926
https://github.com/openbsd/ports/commit/584d2c49a…
https://exim.org/static/doc/security/EXIM-Securit…

Impacted products

1 product

Vendor	Product	Version
Exim	Exim	Affected: 4.98 , < 4.98.1 (custom)

Show details on NVD website

JSON

To clipboard

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CVE-2024-39929 (GCVE-0-2024-39929)

Vulnerability from nvd – Published: 2024-07-04 00:00 – Updated: 2025-03-18 15:37

Summary

Exim through 4.97.1 misparses a multiline RFC 2231 header filename, and thus remote attackers can bypass a $mime_filename extension-blocking protection mechanism, and potentially deliver executable attachments to the mailboxes of end users.

Severity ?

5.4 (Medium)


                        
                          CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:N

CWE

n/a

Assigner

mitre

References

5 references

URL	Tags
https://git.exim.org/exim.git/commit/6ce5c70cff89…
https://git.exim.org/exim.git/commit/1b3209b0577a…
https://github.com/Exim/exim/compare/exim-4.98-RC…
https://www.rfc-editor.org/rfc/rfc2231.txt
https://bugs.exim.org/show_bug.cgi?id=3099#c4

Show details on NVD website

JSON

To clipboard

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CVE-2023-42119 (GCVE-0-2023-42119)

Vulnerability from nvd – Published: 2024-05-03 02:13 – Updated: 2025-11-03 21:49

Title

Exim dnsdb Out-Of-Bounds Read Information Disclosure Vulnerability

Summary

Exim dnsdb Out-Of-Bounds Read Information Disclosure Vulnerability. This vulnerability allows network-adjacent attackers to disclose sensitive information on affected installations of Exim. Authentication is not required to exploit this vulnerability. The specific flaw exists within the smtp service, which listens on TCP port 25 by default. The issue results from the lack of proper validation of user-supplied data, which can result in a read past the end of an allocated buffer. An attacker can leverage this in conjunction with other vulnerabilities to execute arbitrary code in the context of the service account. . Was ZDI-CAN-17643.

Severity ?

3.1 (Low)


                        
                          CVSS:3.0/AV:A/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N

CWE

CWE-125 - Out-of-bounds Read

Assigner

zdi

References

1 reference

URL	Tags
https://www.zerodayinitiative.com/advisories/ZDI-…	x_research-advisory

Impacted products

1 product

Vendor	Product	Version
Exim	Exim	Affected: exim 4.96-RC0-14-24b8ed847-XX

Date Public ?

2023-09-27 22:21

Show details on NVD website

JSON

To clipboard

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CVE-2023-42117 (GCVE-0-2023-42117)

Vulnerability from nvd – Published: 2024-05-03 02:13 – Updated: 2025-11-03 21:49

Title

Exim Improper Neutralization of Special Elements Remote Code Execution Vulnerability

Summary

Exim Improper Neutralization of Special Elements Remote Code Execution Vulnerability. This vulnerability allows remote attackers to execute arbitrary code on affected installations of Exim. Authentication is not required to exploit this vulnerability. The specific flaw exists within the smtp service, which listens on TCP port 25 by default. The issue results from the lack of proper validation of user-supplied data, which can result in a memory corruption condition. An attacker can leverage this vulnerability to execute code in the context of the current process. Was ZDI-CAN-17554.

Severity ?

8.1 (High)


                        
                          CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H

CWE

CWE-138 - Improper Neutralization of Special Elements

Assigner

zdi

References

1 reference

URL	Tags
https://www.zerodayinitiative.com/advisories/ZDI-…	x_research-advisory

Impacted products

1 product

Vendor	Product	Version
Exim	Exim	Affected: 4.96-RC1-11-315206fbf

Date Public ?

2023-09-27 22:21

Show details on NVD website

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CVE-2023-42116 (GCVE-0-2023-42116)

Vulnerability from nvd – Published: 2024-05-03 02:13 – Updated: 2025-11-04 19:21

Title

Exim SMTP Challenge Stack-based Buffer Overflow Remote Code Execution Vulnerability

Summary

Exim SMTP Challenge Stack-based Buffer Overflow Remote Code Execution Vulnerability. This vulnerability allows remote attackers to execute arbitrary code on affected installations of Exim. Authentication is not required to exploit this vulnerability. The specific flaw exists within the handling of NTLM challenge requests. The issue results from the lack of proper validation of the length of user-supplied data prior to copying it to a fixed-length stack-based buffer. An attacker can leverage this vulnerability to execute code in the context of the service account. . Was ZDI-CAN-17515.

Severity ?

8.1 (High)


                        
                          CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H

CWE

CWE-121 - Stack-based Buffer Overflow

Assigner

zdi

References

1 reference

URL	Tags
https://www.zerodayinitiative.com/advisories/ZDI-…	x_research-advisory

Impacted products

1 product

Vendor	Product	Version
Exim	Exim	Affected: exim 4.95

Date Public ?

2023-09-27 22:21

Show details on NVD website

JSON

To clipboard

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CVE-2023-42115 (GCVE-0-2023-42115)

Vulnerability from nvd – Published: 2024-05-03 02:13 – Updated: 2024-09-20 19:51

Title

Exim AUTH Out-Of-Bounds Write Remote Code Execution Vulnerability

Summary

Exim AUTH Out-Of-Bounds Write Remote Code Execution Vulnerability. This vulnerability allows remote attackers to execute arbitrary code on affected installations of Exim. Authentication is not required to exploit this vulnerability. The specific flaw exists within the smtp service, which listens on TCP port 25 by default. The issue results from the lack of proper validation of user-supplied data, which can result in a write past the end of a buffer. An attacker can leverage this vulnerability to execute code in the context of the service account. . Was ZDI-CAN-17434.

Severity ?

9.8 (Critical)


                        
                          CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

CWE

CWE-787 - Out-of-bounds Write

Assigner

zdi

References

1 reference

URL	Tags
https://www.zerodayinitiative.com/advisories/ZDI-…	x_research-advisory

Impacted products

1 product

Vendor	Product	Version
Exim	Exim	Affected: exim 4.95

Date Public ?

2023-09-27 22:21

Show details on NVD website

JSON

To clipboard

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CVE-2023-42114 (GCVE-0-2023-42114)

Vulnerability from nvd – Published: 2024-05-03 02:13 – Updated: 2025-11-04 19:21

Title

Exim NTLM Challenge Out-Of-Bounds Read Information Disclosure Vulnerability

Summary

Exim NTLM Challenge Out-Of-Bounds Read Information Disclosure Vulnerability. This vulnerability allows remote attackers to disclose sensitive information on affected installations of Exim. Authentication is not required to exploit this vulnerability. The specific flaw exists within the handling of NTLM challenge requests. The issue results from the lack of proper validation of user-supplied data, which can result in a read past the end of an allocated data structure. An attacker can leverage this vulnerability to disclose information in the context of the service account. . Was ZDI-CAN-17433.

Severity ?

3.7 (Low)


                        
                          CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N

CWE

CWE-125 - Out-of-bounds Read

Assigner

zdi

References

1 reference

URL	Tags
https://www.zerodayinitiative.com/advisories/ZDI-…	x_research-advisory

Impacted products

1 product

Vendor	Product	Version
Exim	Exim	Affected: exim 4.95

Date Public ?

2023-09-27 22:20

Show details on NVD website

JSON

To clipboard

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CVE-2026-45185 (GCVE-0-2026-45185)

Vulnerability from cvelistv5 – Published: 2026-05-12 00:00 – Updated: 2026-05-14 03:55

Summary

Exim before 4.99.3, in certain GnuTLS configurations, has a remotely reachable use-after-free in the BDAT body parsing path. It is triggered when a client sends a TLS close_notify mid-body during a CHUNKING transfer, followed by a final cleartext byte on the same TCP connection. This can lead to heap corruption. An unauthenticated network attacker exploiting this vulnerability could execute arbitrary code.

Severity ?

9.8 (Critical)


                        
                          CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

CWE

CWE-416 - Use After Free

Assigner

mitre

References

7 references

URL	Tags
https://exim.org
https://code.exim.org/exim/wiki/wiki/EximSecurity
https://exim.org/static/doc/security/CVE-2026-45185.txt
https://xbow.com/blog/dead-letter-cve-2026-45185-…
https://news.ycombinator.com/item?id=48111748
https://www.openwall.com/lists/oss-security/2026/…
https://exim.org/static/doc/security/EXIM-Securit…

Impacted products

1 product

Vendor	Product	Version
Exim	Exim	Affected: 4.97 , < 4.99.3 (custom)

Show details on NVD website

JSON

To clipboard

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CVE-2026-40686 (GCVE-0-2026-40686)

Vulnerability from cvelistv5 – Published: 2026-04-30 00:00 – Updated: 2026-05-01 14:27

Summary

In Exim before 4.99.2, when utf8 operators are enabled, there is an out-of-bounds read if large UTF-8 trailing characters are present (malformed UTF-8 header data). Information might be divulged within an error message produced during handling of an unrelated e-mail message.

Severity ?

3.7 (Low)


                        
                          CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N

CWE

CWE-125 - Out-of-bounds Read

Assigner

mitre

References

4 references

URL	Tags
https://www.openwall.com/lists/oss-security/2026/…
https://exim.org/static/doc/security/cve-2026-04.…
https://code.exim.org/exim/exim/commit/f2570bde16…
https://exim.org/static/doc/security/CVE-2026-40686.txt

Impacted products

1 product

Vendor	Product	Version
Exim	Exim	Affected: 0 , < 4.99.2 (semver)

Show details on NVD website

JSON

To clipboard

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CVE-2026-40684 (GCVE-0-2026-40684)

Vulnerability from cvelistv5 – Published: 2026-04-30 00:00 – Updated: 2026-05-01 17:22

Summary

In Exim before 4.99.2, on systems using musl libc (not glibc), an attacker can crash the connection instance when malformed DNS data is present in PTR records. This is caused by a dn_expand oddity in octal printing.

Severity ?

5.9 (Medium)


                        
                          CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H

CWE

CWE-684 - Incorrect Provision of Specified Functionality

Assigner

mitre

References

4 references

URL	Tags
https://www.openwall.com/lists/oss-security/2026/…
https://exim.org/static/doc/security/cve-2026-04.…
https://code.exim.org/exim/exim/commit/628bbaca76…
https://exim.org/static/doc/security/CVE-2026-40684.txt

Impacted products

1 product

Vendor	Product	Version
Exim	Exim	Affected: 0 , < 4.99.2 (semver)

Show details on NVD website

JSON

To clipboard

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CVE-2026-40687 (GCVE-0-2026-40687)

Vulnerability from cvelistv5 – Published: 2026-04-30 00:00 – Updated: 2026-05-01 14:25

Summary

In Exim before 4.99.2, when the SPA authentication driver is used with an adversarial SPA resource, there can be an out-of-bounds write that crashes the connection instance, or erroneous data processing that divulges data from uninitialized heap memory.

Severity ?

4.8 (Medium)


                        
                          CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:L

CWE

CWE-909 - Missing Initialization of Resource

Assigner

mitre

References

4 references

URL	Tags
https://www.openwall.com/lists/oss-security/2026/…
https://exim.org/static/doc/security/cve-2026-04.…
https://code.exim.org/exim/exim/commit/68b963b9f7…
https://exim.org/static/doc/security/CVE-2026-40687.txt

Impacted products

1 product

Vendor	Product	Version
Exim	Exim	Affected: 0 , < 4.99.2 (semver)

Show details on NVD website

JSON

To clipboard

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CVE-2026-40685 (GCVE-0-2026-40685)

Vulnerability from cvelistv5 – Published: 2026-04-30 00:00 – Updated: 2026-05-01 14:26

Summary

In Exim before 4.99.2, when JSON lookup is enabled, an out-of-bounds heap write can occur when a JSON operator encounters malformed JSON in an untrusted header, because of an incorrect implementation of \ skipping.

Severity ?

6.5 (Medium)


                        
                          CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:H

CWE

CWE-684 - Incorrect Provision of Specified Functionality

Assigner

mitre

References

4 references

URL	Tags
https://www.openwall.com/lists/oss-security/2026/…
https://exim.org/static/doc/security/cve-2026-04.…
https://code.exim.org/exim/exim/commit/9fdc057e71…
https://exim.org/static/doc/security/CVE-2026-40685.txt

Impacted products

1 product

Vendor	Product	Version
Exim	Exim	Affected: 0 , < 4.99.2 (semver)

Show details on NVD website

JSON

To clipboard

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CVE-2025-67896 (GCVE-0-2025-67896)

Vulnerability from cvelistv5 – Published: 2025-12-14 04:00 – Updated: 2025-12-18 23:04

Summary

Exim before 4.99.1, with certain non-default rate-limit configurations, allows a remote heap-based buffer overflow because database records are cast directly to internal structures without validation.

Severity ?

7 (High)


                        
                          CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:H/A:L

CWE

CWE-122 - Heap-based Buffer Overflow

Assigner

mitre

References

3 references

URL	Tags
https://www.openwall.com/lists/oss-security/2025/…
https://exim.org/static/doc/security/
https://exim.org/static/doc/security/EXIM-Securit…

Impacted products

1 product

Vendor	Product	Version
Exim	Exim	Affected: 4.99 , < 4.99.1 (custom)

Show details on NVD website

JSON

To clipboard

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CVE-2025-30232 (GCVE-0-2025-30232)

Vulnerability from cvelistv5 – Published: 2025-03-27 00:00 – Updated: 2025-03-28 14:37

Summary

A use-after-free in Exim 4.96 through 4.98.1 could allow users (with command-line access) to escalate privileges.

Severity ?

8.1 (High)


                        
                          CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:H

CWE

CWE-416 - Use After Free

Assigner

mitre

References

1 reference

URL	Tags
https://www.exim.org/static/doc/security/CVE-2025…

Impacted products

1 product

Vendor	Product	Version
Exim	Exim	Affected: 4.96 , < 4.98.2 (custom)

Show details on NVD website

JSON

To clipboard

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CVE-2025-26794 (GCVE-0-2025-26794)

Vulnerability from cvelistv5 – Published: 2025-02-21 00:00 – Updated: 2025-12-18 18:21

Summary

Exim 4.98 before 4.98.1, when SQLite hints and ETRN serialization are used, allows remote SQL injection. (Resolving SQL injection requires an update to 4.99.1 in certain non-default rate-limit configurations.)

Severity ?

7.5 (High)


                        
                          CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

CWE

CWE-89 - Improper Neutralization of Special Elements used in an SQL Command ('SQL Injection')

Assigner

mitre

References

8 references

URL	Tags
https://exim.org
https://github.com/Exim/exim/wiki/EximSecurity
https://www.exim.org/static/doc/security/CVE-2025…
https://code.exim.org/exim/exim/commit/bfe32b5c6e…
https://bugzilla.suse.com/show_bug.cgi?id=1237424
https://github.com/NixOS/nixpkgs/pull/383926
https://github.com/openbsd/ports/commit/584d2c49a…
https://exim.org/static/doc/security/EXIM-Securit…

Impacted products

1 product

Vendor	Product	Version
Exim	Exim	Affected: 4.98 , < 4.98.1 (custom)

Show details on NVD website

JSON

To clipboard

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CVE-2024-39929 (GCVE-0-2024-39929)

Vulnerability from cvelistv5 – Published: 2024-07-04 00:00 – Updated: 2025-03-18 15:37

Summary

Exim through 4.97.1 misparses a multiline RFC 2231 header filename, and thus remote attackers can bypass a $mime_filename extension-blocking protection mechanism, and potentially deliver executable attachments to the mailboxes of end users.

Severity ?

5.4 (Medium)


                        
                          CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:N

CWE

n/a

Assigner

mitre

References

5 references

URL	Tags
https://git.exim.org/exim.git/commit/6ce5c70cff89…
https://git.exim.org/exim.git/commit/1b3209b0577a…
https://github.com/Exim/exim/compare/exim-4.98-RC…
https://www.rfc-editor.org/rfc/rfc2231.txt
https://bugs.exim.org/show_bug.cgi?id=3099#c4

Show details on NVD website

JSON

To clipboard

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                "cweId": "CWE-116",
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          }
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        "title": "CISA ADP Vulnrichment"
      },
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            "tags": [
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            "url": "https://bugs.exim.org/show_bug.cgi?id=3099#c4"
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          ]
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      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "Exim through 4.97.1 misparses a multiline RFC 2231 header filename, and thus remote attackers can bypass a $mime_filename extension-blocking protection mechanism, and potentially deliver executable attachments to the mailboxes of end users."
        }
      ],
      "problemTypes": [
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CVE-2023-42119 (GCVE-0-2023-42119)

Vulnerability from cvelistv5 – Published: 2024-05-03 02:13 – Updated: 2025-11-03 21:49

Title

Exim dnsdb Out-Of-Bounds Read Information Disclosure Vulnerability

Summary

Exim dnsdb Out-Of-Bounds Read Information Disclosure Vulnerability. This vulnerability allows network-adjacent attackers to disclose sensitive information on affected installations of Exim. Authentication is not required to exploit this vulnerability. The specific flaw exists within the smtp service, which listens on TCP port 25 by default. The issue results from the lack of proper validation of user-supplied data, which can result in a read past the end of an allocated buffer. An attacker can leverage this in conjunction with other vulnerabilities to execute arbitrary code in the context of the service account. . Was ZDI-CAN-17643.

Severity ?

3.1 (Low)


                        
                          CVSS:3.0/AV:A/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N

CWE

CWE-125 - Out-of-bounds Read

Assigner

zdi

References

1 reference

URL	Tags
https://www.zerodayinitiative.com/advisories/ZDI-…	x_research-advisory

Impacted products

1 product

Vendor	Product	Version
Exim	Exim	Affected: exim 4.96-RC0-14-24b8ed847-XX

Date Public ?

2023-09-27 22:21

Show details on NVD website

JSON

To clipboard

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CVE-2023-42117 (GCVE-0-2023-42117)

Vulnerability from cvelistv5 – Published: 2024-05-03 02:13 – Updated: 2025-11-03 21:49

Title

Exim Improper Neutralization of Special Elements Remote Code Execution Vulnerability

Summary

Exim Improper Neutralization of Special Elements Remote Code Execution Vulnerability. This vulnerability allows remote attackers to execute arbitrary code on affected installations of Exim. Authentication is not required to exploit this vulnerability. The specific flaw exists within the smtp service, which listens on TCP port 25 by default. The issue results from the lack of proper validation of user-supplied data, which can result in a memory corruption condition. An attacker can leverage this vulnerability to execute code in the context of the current process. Was ZDI-CAN-17554.

Severity ?

8.1 (High)


                        
                          CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H

CWE

CWE-138 - Improper Neutralization of Special Elements

Assigner

zdi

References

1 reference

URL	Tags
https://www.zerodayinitiative.com/advisories/ZDI-…	x_research-advisory

Impacted products

1 product

Vendor	Product	Version
Exim	Exim	Affected: 4.96-RC1-11-315206fbf

Date Public ?

2023-09-27 22:21

Show details on NVD website

JSON

To clipboard

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CVE-2023-42116 (GCVE-0-2023-42116)

Vulnerability from cvelistv5 – Published: 2024-05-03 02:13 – Updated: 2025-11-04 19:21

Title

Exim SMTP Challenge Stack-based Buffer Overflow Remote Code Execution Vulnerability

Summary

Exim SMTP Challenge Stack-based Buffer Overflow Remote Code Execution Vulnerability. This vulnerability allows remote attackers to execute arbitrary code on affected installations of Exim. Authentication is not required to exploit this vulnerability. The specific flaw exists within the handling of NTLM challenge requests. The issue results from the lack of proper validation of the length of user-supplied data prior to copying it to a fixed-length stack-based buffer. An attacker can leverage this vulnerability to execute code in the context of the service account. . Was ZDI-CAN-17515.

Severity ?

8.1 (High)


                        
                          CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H

CWE

CWE-121 - Stack-based Buffer Overflow

Assigner

zdi

References

1 reference

URL	Tags
https://www.zerodayinitiative.com/advisories/ZDI-…	x_research-advisory

Impacted products

1 product

Vendor	Product	Version
Exim	Exim	Affected: exim 4.95

Date Public ?

2023-09-27 22:21

Show details on NVD website

JSON

To clipboard

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Search criteria

130 vulnerabilities found for exim by exim

CERTFR-2026-AVI-0589

Solutions

CERTFR-2026-AVI-0524

Solutions

CERTFR-2025-AVI-0244

Solutions

CERTFR-2025-AVI-0157

Solutions

CVE-2026-45185 (GCVE-0-2026-45185)

CVE-2026-40687 (GCVE-0-2026-40687)

CVE-2026-40686 (GCVE-0-2026-40686)

CVE-2026-40685 (GCVE-0-2026-40685)

CVE-2026-40684 (GCVE-0-2026-40684)

CVE-2025-67896 (GCVE-0-2025-67896)

CVE-2025-30232 (GCVE-0-2025-30232)

CVE-2025-26794 (GCVE-0-2025-26794)

CVE-2024-39929 (GCVE-0-2024-39929)

CVE-2023-42119 (GCVE-0-2023-42119)

CVE-2023-42117 (GCVE-0-2023-42117)

CVE-2023-42116 (GCVE-0-2023-42116)

CVE-2023-42115 (GCVE-0-2023-42115)

CVE-2023-42114 (GCVE-0-2023-42114)

CVE-2026-45185 (GCVE-0-2026-45185)

CVE-2026-40686 (GCVE-0-2026-40686)

CVE-2026-40684 (GCVE-0-2026-40684)

CVE-2026-40687 (GCVE-0-2026-40687)

CVE-2026-40685 (GCVE-0-2026-40685)

CVE-2025-67896 (GCVE-0-2025-67896)

CVE-2025-30232 (GCVE-0-2025-30232)

CVE-2025-26794 (GCVE-0-2025-26794)

CVE-2024-39929 (GCVE-0-2024-39929)

CVE-2023-42119 (GCVE-0-2023-42119)

CVE-2023-42117 (GCVE-0-2023-42117)

CVE-2023-42116 (GCVE-0-2023-42116)