Link Following Affecting mrtg package, versions <0:2.17.7-11.el9_4.1


Severity

Recommended
0.0
high
0
10

Based on Red Hat Enterprise Linux security rating.

Threat Intelligence

EPSS
0.14% (4th percentile)

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  • Snyk IDSNYK-RHEL9-MRTG-21824117
  • published29 Oct 2026
  • disclosed11 Aug 2026

Introduced: 11 Aug 2026

CVE-2026-72694  (opens in a new tab)
CWE-59  (opens in a new tab)

How to fix?

Upgrade RHEL:9 mrtg to version 0:2.17.7-11.el9_4.1 or higher.
This issue was patched in RHSA-2026:92051.

NVD Description

Note: Versions mentioned in the description apply only to the upstream mrtg package and not the mrtg package as distributed by RHEL. See How to fix? for RHEL:9 relevant fixed versions and status.

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.

CVSS Base Scores

version 3.1