Vulnerability-Lookup

CVE-2026-72694 (GCVE-0-2026-72694)

Vulnerability from cvelistv5 – Published: 2026-08-11 08:37 – Updated: 2026-08-12 15:35

Title

Mrtg: mrtg daemon symlink-following chown allows local privilege escalation via pid file path manipulation

Summary

A flaw was found in MRTG. When the MRTG daemon is started as a root user and subsequently drops privileges, a local, low-privileged attacker can exploit a symbolic link (symlink) following vulnerability. By influencing or pre-placing a symlink in the process ID (PID) file path, the attacker can trick the root process into changing the ownership of an arbitrary existing file to the daemon user. This can lead to local privilege escalation, allowing unauthorized access to or modification of sensitive files.

Severity

7.1 (High)


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

SSVC

Exploitation: none Automatable: no Technical Impact: total

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-08-12 15:35 UTC

CWE

CWE-59 - Improper Link Resolution Before File Access ('Link Following')

Assigner

redhat

References

2 references

URL	Tags
https://access.redhat.com/security/cve/CVE-2026-72694	vdb-entryx_refsource_REDHAT
https://bugzilla.redhat.com/show_bug.cgi?id=2460973	issue-trackingx_refsource_REDHAT

Impacted products

5 products

Vendor	Product	Version
Red Hat	Red Hat Enterprise Linux 10	cpe:/o:redhat:enterprise_linux:10
Red Hat	Red Hat Enterprise Linux 6	cpe:/o:redhat:enterprise_linux:6
Red Hat	Red Hat Enterprise Linux 7	cpe:/o:redhat:enterprise_linux:7
Red Hat	Red Hat Enterprise Linux 8	cpe:/o:redhat:enterprise_linux:8
Red Hat	Red Hat Enterprise Linux 9	cpe:/o:redhat:enterprise_linux:9

Date Public

2026-08-11 07:28

Credits

This issue was discovered by Found by AISLE in partnership with Red Hat.

Show details on NVD website

JSON

To clipboard

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FKIE_CVE-2026-72694

Vulnerability from fkie_nvd - Published: 2026-08-11 09:17 - Updated: 2026-08-12 16:17

Severity

7.1 (High) - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N

Summary

References

	URL	Tags
	secalert@redhat.com	https://access.redhat.com/security/cve/CVE-2026-72694
	secalert@redhat.com	https://bugzilla.redhat.com/show_bug.cgi?id=2460973

Impacted products

	Vendor	Product	Version

JSON

To clipboard

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          "cpes": [
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GHSA-PQRP-P4C6-2Q4G

Vulnerability from github – Published: 2026-08-11 09:32 – Updated: 2026-08-11 09:32

Details

Severity

7.1 (High)


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

Show details on source website

JSON

To clipboard

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  ],
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    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-08-11T09:17:14Z",
    "severity": "HIGH"
  },
  "details": "A flaw was found in MRTG. When the MRTG daemon is started as a root user and subsequently drops privileges, a local, low-privileged attacker can exploit a symbolic link (symlink) following vulnerability. By influencing or pre-placing a symlink in the process ID (PID) file path, the attacker can trick the root process into changing the ownership of an arbitrary existing file to the daemon user. This can lead to local privilege escalation, allowing unauthorized access to or modification of sensitive files.",
  "id": "GHSA-pqrp-p4c6-2q4g",
  "modified": "2026-08-11T09:32:35Z",
  "published": "2026-08-11T09:32:35Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-72694"
    },
    {
      "type": "WEB",
      "url": "https://access.redhat.com/security/cve/CVE-2026-72694"
    },
    {
      "type": "WEB",
      "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2460973"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N",
      "type": "CVSS_V3"
    }
  ]
}

ubuntu-cve-2026-72694

Vulnerability from osv_ubuntu

Published

2026-08-13 00:00

Modified

2026-08-13 00:00

Summary

Details

Severity

7.1 (High)


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

N/A (UNKNOWN)


                    
                      medium

References

URL

Type

	https://ubuntu.com/security/CVE-2026-72694	REPORT
	https://www.cve.org/CVERecord?id=CVE-2026-72694	REPORT
	https://bugzilla.redhat.com/show_bug.cgi?id=2460973	REPORT
	https://access.redhat.com/security/cve/CVE-2026-72694	REPORT

JSON

To clipboard

{
  "affected": [
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "mrtg",
            "binary_version": "2.17.4-3ubuntu1"
          },
          {
            "binary_name": "mrtg-contrib",
            "binary_version": "2.17.4-3ubuntu1"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:16.04:LTS",
        "name": "mrtg",
        "purl": "pkg:deb/ubuntu/mrtg@2.17.4-3ubuntu1?arch=source\u0026distro=xenial"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "2.17.4-2ubuntu2",
        "2.17.4-3ubuntu1"
      ]
    },
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "mrtg",
            "binary_version": "2.17.4-4.1ubuntu1"
          },
          {
            "binary_name": "mrtg-contrib",
            "binary_version": "2.17.4-4.1ubuntu1"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:18.04:LTS",
        "name": "mrtg",
        "purl": "pkg:deb/ubuntu/mrtg@2.17.4-4.1ubuntu1?arch=source\u0026distro=bionic"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "2.17.4-4ubuntu1",
        "2.17.4-4.1ubuntu1"
      ]
    },
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "mrtg",
            "binary_version": "2.17.7-1ubuntu1"
          },
          {
            "binary_name": "mrtg-contrib",
            "binary_version": "2.17.7-1ubuntu1"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:20.04:LTS",
        "name": "mrtg",
        "purl": "pkg:deb/ubuntu/mrtg@2.17.7-1ubuntu1?arch=source\u0026distro=focal"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "2.17.7-1ubuntu1"
      ]
    },
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "mrtg",
            "binary_version": "2.17.10-3"
          },
          {
            "binary_name": "mrtg-contrib",
            "binary_version": "2.17.10-3"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:22.04:LTS",
        "name": "mrtg",
        "purl": "pkg:deb/ubuntu/mrtg@2.17.10-3?arch=source\u0026distro=jammy"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "2.17.7-3ubuntu1",
        "2.17.8+git20211026.912afc5-4",
        "2.17.8+git20211026.912afc5-5",
        "2.17.8+git20211109.9205d1d-1",
        "2.17.8+git20211109.9205d1d-2",
        "2.17.8+git20211109.9205d1d-3",
        "2.17.9-1",
        "2.17.10-1",
        "2.17.10-2",
        "2.17.10-3"
      ]
    },
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "mrtg",
            "binary_version": "2.17.10-12"
          },
          {
            "binary_name": "mrtg-contrib",
            "binary_version": "2.17.10-12"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:24.04:LTS",
        "name": "mrtg",
        "purl": "pkg:deb/ubuntu/mrtg@2.17.10-12?arch=source\u0026distro=noble"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "2.17.10-9",
        "2.17.10-12"
      ]
    },
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "mrtg",
            "binary_version": "2.17.10-14"
          },
          {
            "binary_name": "mrtg-contrib",
            "binary_version": "2.17.10-14"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:26.04:LTS",
        "name": "mrtg",
        "purl": "pkg:deb/ubuntu/mrtg@2.17.10-14?arch=source\u0026distro=resolute"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "2.17.10-13",
        "2.17.10-14"
      ]
    }
  ],
  "aliases": [],
  "details": "A flaw was found in MRTG. When the MRTG daemon is started as a root user and subsequently drops privileges, a local, low-privileged attacker can exploit a symbolic link (symlink) following vulnerability. By influencing or pre-placing a symlink in the process ID (PID) file path, the attacker can trick the root process into changing the ownership of an arbitrary existing file to the daemon user. This can lead to local privilege escalation, allowing unauthorized access to or modification of sensitive files.",
  "id": "UBUNTU-CVE-2026-72694",
  "modified": "2026-08-13T00:00:00Z",
  "published": "2026-08-13T00:00:00Z",
  "references": [
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2026-72694"
    },
    {
      "type": "REPORT",
      "url": "https://www.cve.org/CVERecord?id=CVE-2026-72694"
    },
    {
      "type": "REPORT",
      "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2460973"
    },
    {
      "type": "REPORT",
      "url": "https://access.redhat.com/security/cve/CVE-2026-72694"
    }
  ],
  "related": [],
  "schema_version": "1.7.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N",
      "type": "CVSS_V3"
    },
    {
      "score": "medium",
      "type": "Ubuntu"
    }
  ],
  "upstream": [
    "CVE-2026-72694"
  ]
}

Sightings

Author	Source	Type	Date	Other

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.

The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.

Action not permitted

CVE-2026-72694 (GCVE-0-2026-72694)

FKIE_CVE-2026-72694

GHSA-PQRP-P4C6-2Q4G

ubuntu-cve-2026-72694

Vulnerability from osv_ubuntu

Tags

Sightings

Nomenclature