CVE-2026-67281: MikroTik RouterOS

High severity, CVSS 7.5. EPSS: 0.7% chance of exploitation in the next 30 days.

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)

Affected products

• MikroTik RouterOS: from 7.20, before 7.23.4 (fixed in 7.23.4); from 7.24, before 7.24.2 (fixed in 7.24.2)

Published 2026-09-05. Last modified 2026-09-25.