Unauthenticated File-Read Vulnerability in RouterOS by MikroTik
CVE-2026-67281

8.7HIGH

Key Information:

Vendor

Mikrotik

Status
Routeros
Vendor
CVE Published:
5 September 2026

Badges

👾 Exploit Exists

What is CVE-2026-67281?

RouterOS WebFig is susceptible to an unauthenticated file-read vulnerability located in the /jsproxy path. This underlying flaw allows an attacker to exploit a stale uninitialized principal pointer utilized for file authorization. By strategically preparing the allocator, an unauthorized actor can leverage this vulnerability to dereference the pointer with elevated rights. Consequently, they can manipulate encrypted URIs to traverse out of the WebFig file namespace, achieving unauthorized access to root-owned files. This includes sensitive configuration stores containing credentials. The issue has been remediated in RouterOS versions 6.49.21, 7.23.4, and 7.24.2.

Affected Version(s)

RouterOS 7.24 < 7.24.2

RouterOS 7.0.0 < 7.23.4

RouterOS 6.0.0 < 6.49.21

References

https://cert.pl/en/posts/2026/09/mikrotik-routeros-cve
third-party-advisory
https://cert.pl/en/posts/2026/09/vulnerabilities-in-mikro...
technical-description
https://npratley.net/reversing-mikrotiks-silent-patch-the...
exploit

CVSS V4

Score:
8.7
Severity:
HIGH
Confidentiality:
High
Integrity:
None
Availability:
None
Attack Vector:
Network
Attack Complexity:
Low
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
None

Timeline

  • 🟡

    Public PoC available

  • 👾

    Exploit known to exist

  • Vulnerability published

  • Vulnerability Reserved

Credit

Sławomir Rozbicki (CERT.PL)
.