CVE-2026-67281

HighCVSS 7.5/10Last modified Sep 25, 2026

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)

Metrics

CVSS 3.1 7.5/10CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

Weakness enumeration

CWE-22 CWE-824

Affected software

Vendor	Product	Versions
Mikrotik	RouterOS	>= 7.24, < 7.24.2; >= 7.20, < 7.23.4

References

https://cert.pl/en/posts/2026/09/mikrotik-routeros-cveThird Party Advisory
https://cert.pl/en/posts/2026/09/vulnerabilities-in-mikrotik-routeros-actively-exploited/Mitigation, Third Party Advisory
https://forum.mikrotik.com/t/7-23-4-long-term-is-released/272801Release Notes
https://forum.mikrotik.com/t/7-24-2-stable-is-released/272800Release Notes
https://mikrotik.com/supportsec/september-2026-vulnerability/Vendor Advisory
https://npratley.net/reversing-mikrotiks-silent-patch-the-routeros-7-23-4-fix-they-wouldnt-explain/Exploit, Third Party Advisory

Timeline

Published: Sep 5, 2026
Last modified: Sep 25, 2026
NVD status: Analyzed

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