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CVE-2026-67281

7.5 · HIGH

RouterOS WebFig contains an unauthenticated file-read vulnerability in the /jsproxy path where a newly allocated session retains a stale uninitialized principal pointer used for file authorization.

Published Sep 5, 2026mikrotikCWE-22EPSS 0.73%

Overview

CVE-2026-67281 is a high-severity vulnerability affecting mikrotik routeros. It was published on September 5, 2026 and has a CVSS 3.1 base score of 7.5 (HIGH).

This vulnerability has a CVSS 3.1 base score of 7.5, rated HIGH. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

Technical description

RouterOS WebFig contains an unauthenticated file-read vulnerability in the /jsproxy path where a newly allocated session retains a stale uninitialized principal pointer used for file authorization. An unauthenticated attacker can prepare the allocator so that the file-serving path dereferences this pointer with sufficient rights, then supply parent-directory components in an encrypted URI to escape the WebFig file namespace and disclose root-owned files, including configuration stores containing credentials.This issue affects only 7.x branch was fixed in versions: 7.23.4 (Long-term) and 7.24.2 (Stable)

Remediation

Check the references section for vendor advisories and patches from mikrotik. Update routeros to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

Affected products

VendorProductVersionsStatus
mikrotikrouteros>= 7.20, < 7.23.4Affected

References

Refcert.pl/en/posts/2026/09/mikrotik-routeros-cveRefcert.pl/en/posts/2026/09/vulnerabilities-in-mikrotik-routeros-actively-exploited/Refforum.mikrotik.com/t/7-23-4-long-term-is-released/272801Refforum.mikrotik.com/t/7-24-2-stable-is-released/272800Refmikrotik.com/supportsec/september-2026-vulnerability/Refnpratley.net/reversing-mikrotiks-silent-patch-the-routeros-7-23-4-fix-they-wouldnt-explain/

How CyberStrike helps

Frequently asked questions

What is CVE-2026-67281?

CVE-2026-67281 is a high-severity vulnerability affecting mikrotik routeros. It was published on September 5, 2026 and has a CVSS 3.1 base score of 7.5 (HIGH).

How severe is CVE-2026-67281?

This vulnerability has a CVSS 3.1 base score of 7.5, rated HIGH. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

How do I fix or remediate CVE-2026-67281?

Check the references section for vendor advisories and patches from mikrotik. Update routeros to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

How can CyberStrike help with CVE-2026-67281?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2026-67281 is actually reachable in your own applications and APIs, then verifies each finding before reporting it. That tells you if the weakness is a real, exploitable risk in your environment or a false positive you can safely deprioritize.

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