High severity · published Sep 5, 2026
CVE-2026-67281
Unauthenticated file read in Mikrotik RouterOS
7.5
CVSS
0.7%
EPSS
No
On KEV
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)
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
High
Integrity
None
Availability
None
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.7% · higher than 54% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
RO
RouterOS · Mikrotik
7.24 before 7.24.2; 7.20 before 7.23.4 · source: vendor, NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-67281
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-67281
Third Party Advisory
https://cert.pl/en/posts/2026/09/mikrotik-routeros-cve
Mitigation
https://cert.pl/en/posts/2026/09/vulnerabilities-in-mikrotik-routeros-actively-exploited/
Release Notes
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
Vendor Advisory
https://mikrotik.com/supportsec/september-2026-vulnerability/
Exploit
https://npratley.net/reversing-mikrotiks-silent-patch-the-routeros-7-23-4-fix-they-wouldnt-explain/
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