VULNERABILITY INTELLIGENCE

CVE-2026-89021

CVSS score6.9 MEDIUM
EPSS probability0.38%
CISA KEVNot currently listed
Published2026-09-14
Last modified2026-09-24
CVSS vectorCVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:N/I:H/A:L

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.

Weakness classification

  • disclosure@vulncheck.com: CWE-22

Primary references