MikroTik RouterOS up to 7.24.1 Container Package path traversal

Summaryinfo

A vulnerability classified as problematic has been found in MikroTik RouterOS up to 7.24.1. This affects an unknown function of the component Container Package. This manipulation causes path traversal. This vulnerability is registered as CVE-2026-89021. Remote exploitation of the attack is possible. No exploit is available. It is recommended to upgrade the affected component.

Detailsinfo

A vulnerability was found in MikroTik RouterOS up to 7.24.1. It has been declared as problematic. Affected by this vulnerability is some unknown processing of the component Container Package. The manipulation with an unknown input leads to a path traversal vulnerability. The CWE definition for the vulnerability is CWE-22. The product uses external input to construct a pathname that is intended to identify a file or directory that is located underneath a restricted parent directory, but the product does not properly neutralize special elements within the pathname that can cause the pathname to resolve to a location that is outside of the restricted directory. As an impact it is known to affect integrity, and availability. The summary by CVE is:

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, and there is no fixed long-term release at the time of publication.

It is possible to read the advisory at mikrotik.com. This vulnerability is known as CVE-2026-89021 since 09/10/2026. The exploitation appears to be easy. The attack can be launched remotely. The exploitation requires an enhanced level of successful authentication. It demands that the victim is doing some kind of user interaction. The technical details are unknown and an exploit is not publicly available. The attack technique deployed by this issue is T1006 according to MITRE ATT&CK.

Upgrading to version 7.24.2 eliminates this vulnerability.

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Productinfo

Type

• Router Operating System

Vendor

• MikroTik

Name

• RouterOS

Version

• 7.24.0
• 7.24.1

License

• commercial

CPE 2.3info

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• 🔒

CPE 2.2info

• 🔒
• 🔒

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