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Back to active CVEs
Medium · CVSS 6.9CVE-2026-89021

MikroTik RouterOS Path Traversal via Container OCI/tar Image ExtractionCVE-2026-89021

Answer in brief

CVE-2026-89021 records a Medium severity (CVSS 6.9) vulnerability in MikroTik RouterOS Path Traversal via Container OCI/tar Image Extraction. The current sources do not mark it as known exploited. The current feed maps MikroTik/RouterOS (generic). Check affected ranges and fixed versions before updating.

Analysis pending evidence review

HOL Guard separates source facts from reviewed analysis. See the methodology.

Published Sep 14, 2026Updated Oct 1, 2026Source checked Oct 29, 2026First seen by HOL Sep 14, 2026Material review Oct 1, 2026
Upstream Advisory

Key facts

Risk
Medium · CVSS 6.9
Exploitation
Not marked as known exploited
Affected software
1 mapped package or product
Fix availability
Available

Why this deserves its current priority

CVSS is 6.9. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.

Analysis status

Analysis pending evidence review

Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.

Affected scope and exposure questions

The current feed maps MikroTik/RouterOS (generic). Check affected ranges and fixed versions before updating.

Mapped affected packages and fixed versions
PackageAffected rangeFixed version
MikroTik/RouterOSgeneric>=0 <7.24.27.24.2

Recommended response

  1. 1Check inventory. Check lockfiles and deployed manifests for MikroTik/RouterOS.
  2. 2Review the reported fix. Update MikroTik/RouterOS to 7.24.2 if you use the affected versions. Test the change in a non-production environment first.

Evidence timeline and material changes

  1. Published upstream

    Sep 14, 2026

    Evidence: source:cvelist:source_dates:source-dates:record

  2. Source modified

    Oct 1, 2026

    Evidence: source:cvelist:source_dates:source-dates:record

  3. First seen by HOL

    Sep 14, 2026

Sources and claim methodology

  • Source referenceforum.mikrotik.com
  • Source referencevulncheck.com
  • Source referencemikrotik.com
Upstream source description

MikroTik RouterOS before 7.24.2 contains a path traversal vulnerability in the container package OCI/tar image extraction that allows attackers to write files outside the container root by supplying a crafted container image with symlinks pointing to arbitrary paths. Attackers can exploit unsanitized tar member path extraction during container import via /container/add to achieve root-privileged file creation, directory creation, file deletion via overlayfs whiteout, and hardlink creation on the persistent data partition without ever starting the container. The 7.23.x long-term branch does not contain this fix; the container binaries in container-7.23.3.npk and container-7.23.4.npk are byte-identical. The vendor has confirmed that the issue is not resolved in the long-term release and that the fix is carried forward only in the stable branch from 7.24.2 onward, with no backport to the long-term branch planned.

Quoted source text, attributed separately from HOL analysis.

Related CVEs

  • Nomad dispatch payload writes can escape the allocation directory through symlinksAlso CWE-59
  • Nomad allocation data migration may allow host directory permission modification via symlink followingAlso CWE-59

Record context

Vulnerability class
Path Traversal
EPSS
Not reported
CWE IDs
CWE-59, CWE-22
Source
CVE List V5
Source checked
Oct 29, 2026
References
3 linked sources
Open source record