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)
Attack Parameters
Attack Vector
Network
Can be exploited remotely
Attack Complexity
Low
Easy to exploit
Attack Requirements
None
No additional conditions
Privileges Required
None
No privileges needed
User Interaction
None
No user interaction needed
Impact Assessment
Confidentiality
High
Complete data leak
Integrity
None
No data modification
Availability
None
No disruption
CVSS Vector v4.0
Weakness Type (CWE)
Vulnerable Products 2
| Configuration | From (including) | Up to (excluding) |
|---|---|---|
|
Mikrotik Routeros
cpe:2.3:o:mikrotik:routeros:*:*:*:*:*:*:*:*
|
7.20
|
7.23.4
|
|
Mikrotik Routeros
cpe:2.3:o:mikrotik:routeros:*:*:*:*:*:*:*:*
|
7.24
|
7.24.2
|
References 7
https://cert.pl/en/posts/2026/09/mikrotik-routeros-cve
cvd@cert.pl
https://cert.pl/en/posts/2026/09/vulnerabilities-in-mikrotik-routeros-actively-…
cvd@cert.pl
https://forum.mikrotik.com/t/6-49-21-long-term-is-released/272802
cvd@cert.pl
https://forum.mikrotik.com/t/7-23-4-long-term-is-released/272801
cvd@cert.pl
https://forum.mikrotik.com/t/7-24-2-stable-is-released/272800
cvd@cert.pl
https://mikrotik.com/supportsec/september-2026-vulnerability/
cvd@cert.pl
https://npratley.net/reversing-mikrotiks-silent-patch-the-routeros-7-23-4-fix-t…
cvd@cert.pl