CVE-2026-67433

Root file corruption via legacy-database symlink following

Published Jul 29, 2026 · Updated Jul 29, 2026

Link following in Linuxfabrik Monitoring Plugins 6.0.0 allows local users to corrupt root-writable files through the logfile check. Its legacy migration renames a predictable /tmp path without rejecting a symlink, then sqlite3.connect() follows the moved link inside the secured state directory. Exploitation requires control of the monitoring account, a root-run logfile check, and non-default fs.protected_symlinks=0; writes can target an empty file or corrupt an existing SQLite database.

CVSS severity5.8
Medium
EPSS probability0.08%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Link following in Linuxfabrik Monitoring Plugins 6.0.0 allows local users to corrupt root-writable files through the logfile check. Its legacy migration renames a predictable /tmp path without rejecting a symlink, then sqlite3.connect() follows the moved link inside the secured state directory. Exploitation requires control of the monitoring account, a root-run logfile check, and non-default fs.protected_symlinks=0; writes can target an empty file or corrupt an existing SQLite database.

The record

CVE
CVE-2026-67433
Published
Jul 29, 2026
Updated
Jul 29, 2026
Vendor
Linuxfabrik
Product
Linuxfabrik Monitoring Plugins
Classifications
CWE-59, CWE-367, T1548.003
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Jul 29, 2026CVE publishedPublication date reported by the CVE source.
  2. Jul 29, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=6.0.0

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

Linuxfabrik · Linuxfabrik Monitoring Pluginsversion=6.0.0

Published CVSS scores

5.8GitHub, Inc.CVSS:4.0/AV:L/AC:H/AT:P/PR:L/UI:N/VC:N/VI:H/VA:L/SC:N/SI:N/SA:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-59Improper Link Resolution Before File Access ('Link Following')
CWE-367Time-of-check Time-of-use (TOCTOU) Race Condition
T1548.003Sudo and Sudo Caching

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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