Access of Uninitialized Pointer in MikroTik RouterOS - CVE-2026-67281
Published: September 6, 2026
Vulnerability identifier: #VU147170
CSH Severity: Medium
CVSS v4: 8.2 [CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-67281
CWE-ID: CWE-824
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote attacker to disclose root-owned files.
The vulnerability exists due to access of an uninitialized pointer in the RouterOS WebFig /jsproxy file authorization path when handling crafted encrypted URIs. A remote attacker can prepare the allocator and supply parent-directory components in an encrypted URI to disclose root-owned files.
The stale principal pointer can be dereferenced with sufficient rights to escape the WebFig file namespace.
Affected software
MikroTik RouterOS
How to mitigate CVE-2026-67281
Install security update from vendor's website.
MikroTik RouterOS - addressed in versions 6.49.21, 7.23.4, 7.24.2