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)
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| Mikrotik | RouterOS | 7.24 – < 7.24.2, 7.20 – < 7.23.4 | 7.24.2 |
Public exploits
Exploit or proof-of-concept code for this vulnerability is publicly available, which lowers the bar for attackers. Treat it as a reason to patch sooner.
GitHub 1 repository
-
sohel160/Webfig-jsproxy-unauthenticated-file-read-CVE-2026-67281- ★ 0 · Oct 14, 2026
Sources: PoC-in-GitHub, Metasploit Framework, Exploit-DB — updated daily. Only links are listed; no exploit code is hosted here.
Advisories 1
- WID-SEC-2026-3193 MikroTik RouterOS: Mehrere Schwachstellen BSI CERT-Bund (WID) · Sep 10, 2026
References
- https://cert.pl/en/posts/2026/09/mikrotik-routeros-cve third-party-advisory
- https://cert.pl/en/posts/2026/09/vulnerabilities-in-mikrotik-routeros-actively-exploited/ technical-description
- https://npratley.net/reversing-mikrotiks-silent-patch-the-routeros-7-23-4-fix-they-wouldnt-explain/ exploit
- https://mikrotik.com/supportsec/september-2026-vulnerability/ vendor-advisory
- https://forum.mikrotik.com/t/7-23-4-long-term-is-released/272801 release-notes
- https://forum.mikrotik.com/t/7-24-2-stable-is-released/272800 release-notes