CVE-2026-27221 (GCVE-0-2026-27221)

Vulnerability from cvelistv5 – Published: 2026-03-10 21:41 – Updated: 2026-03-11 13:08
VLAI?
Title
Acrobat Reader | Improper Certificate Validation (CWE-295)
Summary
Acrobat Reader versions 24.001.30307, 24.001.30308, 25.001.21265 and earlier are affected by an Improper Certificate Validation vulnerability that could result in a Security feature bypass. An attacker could leverage this vulnerability to spoof the identity of a signer. Exploitation of this issue requires user interaction.
Severity ?
5.5 (Medium)
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N
CWE
  • CWE-295 - Improper Certificate Validation (CWE-295)
Assigner
References
Impacted products
Vendor Product Version
Adobe Acrobat Reader Affected: 0 , ≤ 25.001.21265 (semver)
Create a notification for this product.
Date Public ?
2026-03-10 17:00
Show details on NVD website
To clipboard 

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2026-27221",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "total"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-03-11T03:57:08.259918Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2026-03-11T13:08:15.923Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "defaultStatus": "affected",
          "product": "Acrobat Reader",
          "vendor": "Adobe",
          "versions": [
            {
              "lessThanOrEqual": "25.001.21265",
              "status": "affected",
              "version": "0",
              "versionType": "semver"
            }
          ]
        }
      ],
      "datePublic": "2026-03-10T17:00:00.000Z",
      "descriptions": [
        {
          "lang": "en",
          "value": "Acrobat Reader versions 24.001.30307, 24.001.30308, 25.001.21265 and earlier are affected by an Improper Certificate Validation vulnerability that could result in a Security feature bypass. An attacker could leverage this vulnerability to spoof the identity of a signer. Exploitation of this issue requires user interaction."
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "attackComplexity": "LOW",
            "attackVector": "LOCAL",
            "availabilityImpact": "NONE",
            "availabilityRequirement": "NOT_DEFINED",
            "baseScore": 5.5,
            "baseSeverity": "MEDIUM",
            "confidentialityImpact": "NONE",
            "confidentialityRequirement": "NOT_DEFINED",
            "environmentalScore": 5.5,
            "environmentalSeverity": "MEDIUM",
            "exploitCodeMaturity": "NOT_DEFINED",
            "integrityImpact": "HIGH",
            "integrityRequirement": "NOT_DEFINED",
            "modifiedAttackComplexity": "LOW",
            "modifiedAttackVector": "LOCAL",
            "modifiedAvailabilityImpact": "NONE",
            "modifiedConfidentialityImpact": "NONE",
            "modifiedIntegrityImpact": "HIGH",
            "modifiedPrivilegesRequired": "NONE",
            "modifiedScope": "UNCHANGED",
            "modifiedUserInteraction": "REQUIRED",
            "privilegesRequired": "NONE",
            "remediationLevel": "NOT_DEFINED",
            "reportConfidence": "NOT_DEFINED",
            "scope": "UNCHANGED",
            "temporalScore": 5.5,
            "temporalSeverity": "MEDIUM",
            "userInteraction": "REQUIRED",
            "vectorString": "CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N",
            "version": "3.1"
          },
          "format": "CVSS",
          "scenarios": [
            {
              "lang": "en",
              "value": "GENERAL"
            }
          ]
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-295",
              "description": "Improper Certificate Validation (CWE-295)",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-03-10T21:41:36.952Z",
        "orgId": "078d4453-3bcd-4900-85e6-15281da43538",
        "shortName": "adobe"
      },
      "references": [
        {
          "tags": [
            "vendor-advisory"
          ],
          "url": "https://helpx.adobe.com/security/products/acrobat/apsb26-26.html"
        }
      ],
      "source": {
        "discovery": "EXTERNAL"
      },
      "title": "Acrobat Reader | Improper Certificate Validation (CWE-295)"
    }
  },
  "cveMetadata": {
    "assignerOrgId": "078d4453-3bcd-4900-85e6-15281da43538",
    "assignerShortName": "adobe",
    "cveId": "CVE-2026-27221",
    "datePublished": "2026-03-10T21:41:36.952Z",
    "dateReserved": "2026-02-18T22:02:41.380Z",
    "dateUpdated": "2026-03-11T13:08:15.923Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2",
  "vulnerability-lookup:meta": {
    "nvd": "{\"cve\":{\"id\":\"CVE-2026-27221\",\"sourceIdentifier\":\"psirt@adobe.com\",\"published\":\"2026-03-10T22:16:18.090\",\"lastModified\":\"2026-03-11T18:15:14.850\",\"vulnStatus\":\"Analyzed\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"Acrobat Reader versions 24.001.30307, 24.001.30308, 25.001.21265 and earlier are affected by an Improper Certificate Validation vulnerability that could result in a Security feature bypass. An attacker could leverage this vulnerability to spoof the identity of a signer. Exploitation of this issue requires user interaction.\"},{\"lang\":\"es\",\"value\":\"Las versiones de Acrobat Reader 24.001.30307, 24.001.30308, 25.001.21265 y anteriores est\u00e1n afectadas por una vulnerabilidad de Validaci\u00f3n de Certificado Inapropiada que podr\u00eda resultar en una omisi\u00f3n de caracter\u00edstica de seguridad. Un atacante podr\u00eda aprovechar esta vulnerabilidad para suplantar la identidad de un firmante. La explotaci\u00f3n de este problema requiere interacci\u00f3n del usuario.\"}],\"metrics\":{\"cvssMetricV31\":[{\"source\":\"psirt@adobe.com\",\"type\":\"Primary\",\"cvssData\":{\"version\":\"3.1\",\"vectorString\":\"CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N\",\"baseScore\":5.5,\"baseSeverity\":\"MEDIUM\",\"attackVector\":\"LOCAL\",\"attackComplexity\":\"LOW\",\"privilegesRequired\":\"NONE\",\"userInteraction\":\"REQUIRED\",\"scope\":\"UNCHANGED\",\"confidentialityImpact\":\"NONE\",\"integrityImpact\":\"HIGH\",\"availabilityImpact\":\"NONE\"},\"exploitabilityScore\":1.8,\"impactScore\":3.6}]},\"weaknesses\":[{\"source\":\"psirt@adobe.com\",\"type\":\"Primary\",\"description\":[{\"lang\":\"en\",\"value\":\"CWE-295\"}]}],\"configurations\":[{\"operator\":\"AND\",\"nodes\":[{\"operator\":\"OR\",\"negate\":false,\"cpeMatch\":[{\"vulnerable\":true,\"criteria\":\"cpe:2.3:a:adobe:acrobat_dc:*:*:*:*:continuous:*:*:*\",\"versionEndExcluding\":\"25.001.21288\",\"matchCriteriaId\":\"02783E59-AA2E-4AC3-9675-6487AE0C9068\"}]},{\"operator\":\"OR\",\"negate\":false,\"cpeMatch\":[{\"vulnerable\":false,\"criteria\":\"cpe:2.3:o:apple:macos:-:*:*:*:*:*:*:*\",\"matchCriteriaId\":\"387021A0-AF36-463C-A605-32EA7DAC172E\"},{\"vulnerable\":false,\"criteria\":\"cpe:2.3:o:microsoft:windows:-:*:*:*:*:*:*:*\",\"matchCriteriaId\":\"A2572D17-1DE6-457B-99CC-64AFD54487EA\"}]}]},{\"operator\":\"AND\",\"nodes\":[{\"operator\":\"OR\",\"negate\":false,\"cpeMatch\":[{\"vulnerable\":true,\"criteria\":\"cpe:2.3:a:adobe:acrobat_reader_dc:*:*:*:*:continuous:*:*:*\",\"versionEndExcluding\":\"25.001.21288\",\"matchCriteriaId\":\"70AABB39-8370-495D-AC09-2F30A1AB83AF\"}]},{\"operator\":\"OR\",\"negate\":false,\"cpeMatch\":[{\"vulnerable\":false,\"criteria\":\"cpe:2.3:o:apple:macos:-:*:*:*:*:*:*:*\",\"matchCriteriaId\":\"387021A0-AF36-463C-A605-32EA7DAC172E\"},{\"vulnerable\":false,\"criteria\":\"cpe:2.3:o:microsoft:windows:-:*:*:*:*:*:*:*\",\"matchCriteriaId\":\"A2572D17-1DE6-457B-99CC-64AFD54487EA\"}]}]},{\"operator\":\"AND\",\"nodes\":[{\"operator\":\"OR\",\"negate\":false,\"cpeMatch\":[{\"vulnerable\":true,\"criteria\":\"cpe:2.3:a:adobe:acrobat:*:*:*:*:classic:*:*:*\",\"versionStartIncluding\":\"24.001.20604\",\"versionEndExcluding\":\"24.001.30356\",\"matchCriteriaId\":\"9F95602E-25EA-45D7-9A60-DC7A01CD6AFE\"}]},{\"operator\":\"OR\",\"negate\":false,\"cpeMatch\":[{\"vulnerable\":false,\"criteria\":\"cpe:2.3:o:apple:macos:-:*:*:*:*:*:*:*\",\"matchCriteriaId\":\"387021A0-AF36-463C-A605-32EA7DAC172E\"},{\"vulnerable\":false,\"criteria\":\"cpe:2.3:o:microsoft:windows:-:*:*:*:*:*:*:*\",\"matchCriteriaId\":\"A2572D17-1DE6-457B-99CC-64AFD54487EA\"}]}]}],\"references\":[{\"url\":\"https://helpx.adobe.com/security/products/acrobat/apsb26-26.html\",\"source\":\"psirt@adobe.com\",\"tags\":[\"Vendor Advisory\"]}]}}",
    "vulnrichment": {
      "containers": "{\"cna\": {\"title\": \"Acrobat Reader | Improper Certificate Validation (CWE-295)\", \"source\": {\"discovery\": \"EXTERNAL\"}, \"metrics\": [{\"format\": \"CVSS\", \"cvssV3_1\": {\"scope\": \"UNCHANGED\", \"version\": \"3.1\", \"baseScore\": 5.5, \"attackVector\": \"LOCAL\", \"baseSeverity\": \"MEDIUM\", \"vectorString\": \"CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N\", \"modifiedScope\": \"UNCHANGED\", \"temporalScore\": 5.5, \"integrityImpact\": \"HIGH\", \"userInteraction\": \"REQUIRED\", \"attackComplexity\": \"LOW\", \"remediationLevel\": \"NOT_DEFINED\", \"reportConfidence\": \"NOT_DEFINED\", \"temporalSeverity\": \"MEDIUM\", \"availabilityImpact\": \"NONE\", \"environmentalScore\": 5.5, \"privilegesRequired\": \"NONE\", \"exploitCodeMaturity\": \"NOT_DEFINED\", \"integrityRequirement\": \"NOT_DEFINED\", \"modifiedAttackVector\": \"LOCAL\", \"confidentialityImpact\": \"NONE\", \"environmentalSeverity\": \"MEDIUM\", \"availabilityRequirement\": \"NOT_DEFINED\", \"modifiedIntegrityImpact\": \"HIGH\", \"modifiedUserInteraction\": \"REQUIRED\", \"modifiedAttackComplexity\": \"LOW\", \"confidentialityRequirement\": \"NOT_DEFINED\", \"modifiedAvailabilityImpact\": \"NONE\", \"modifiedPrivilegesRequired\": \"NONE\", \"modifiedConfidentialityImpact\": \"NONE\"}, \"scenarios\": [{\"lang\": \"en\", \"value\": \"GENERAL\"}]}], \"affected\": [{\"vendor\": \"Adobe\", \"product\": \"Acrobat Reader\", \"versions\": [{\"status\": \"affected\", \"version\": \"0\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"25.001.21265\"}], \"defaultStatus\": \"affected\"}], \"datePublic\": \"2026-03-10T17:00:00.000Z\", \"references\": [{\"url\": \"https://helpx.adobe.com/security/products/acrobat/apsb26-26.html\", \"tags\": [\"vendor-advisory\"]}], \"descriptions\": [{\"lang\": \"en\", \"value\": \"Acrobat Reader versions 24.001.30307, 24.001.30308, 25.001.21265 and earlier are affected by an Improper Certificate Validation vulnerability that could result in a Security feature bypass. An attacker could leverage this vulnerability to spoof the identity of a signer. Exploitation of this issue requires user interaction.\"}], \"problemTypes\": [{\"descriptions\": [{\"lang\": \"en\", \"type\": \"CWE\", \"cweId\": \"CWE-295\", \"description\": \"Improper Certificate Validation (CWE-295)\"}]}], \"providerMetadata\": {\"orgId\": \"078d4453-3bcd-4900-85e6-15281da43538\", \"shortName\": \"adobe\", \"dateUpdated\": \"2026-03-10T21:41:36.952Z\"}}, \"adp\": [{\"title\": \"CISA ADP Vulnrichment\", \"metrics\": [{\"other\": {\"type\": \"ssvc\", \"content\": {\"id\": \"CVE-2026-27221\", \"role\": \"CISA Coordinator\", \"options\": [{\"Exploitation\": \"none\"}, {\"Automatable\": \"no\"}, {\"Technical Impact\": \"total\"}], \"version\": \"2.0.3\", \"timestamp\": \"2026-03-11T03:57:08.259918Z\"}}}], \"providerMetadata\": {\"shortName\": \"CISA-ADP\", \"orgId\": \"134c704f-9b21-4f2e-91b3-4a467353bcc0\", \"dateUpdated\": \"2026-03-11T13:02:03.066Z\"}}]}",
      "cveMetadata": "{\"cveId\": \"CVE-2026-27221\", \"state\": \"PUBLISHED\", \"dateUpdated\": \"2026-03-10T21:41:36.952Z\", \"dateReserved\": \"2026-02-18T22:02:41.380Z\", \"assignerOrgId\": \"078d4453-3bcd-4900-85e6-15281da43538\", \"datePublished\": \"2026-03-10T21:41:36.952Z\", \"assignerShortName\": \"adobe\"}",
      "dataType": "CVE_RECORD",
      "dataVersion": "5.2"
    }
  }
}


Log in or create an account to share your comment.




Tags
Taxonomy of the tags.




Sightings

Author Source Type Date

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.



Detection rules are retrieved from Rulezet.