---
id: CVE-2026-67281
title: >-
  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
summary: >-
  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…
severity: high
cvss: 8.7
cvssVector: 'CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N'
cwe:
  - CWE-22
  - CWE-824
vendor: Mikrotik
product: RouterOS
affected:
  - RouterOS >= 7.24 < 7.24.2
  - RouterOS >= 7.20 < 7.23.4
published: '2026-09-05'
updated: '2026-09-08'
sourceUpdated: '2026-09-08T16:18:11.057'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-67281'
references:
  - url: 'https://cert.pl/en/posts/2026/09/mikrotik-routeros-cve'
    label: cvd@cert.pl
  - url: >-
      https://cert.pl/en/posts/2026/09/vulnerabilities-in-mikrotik-routeros-actively-exploited/
    label: cvd@cert.pl
  - url: 'https://forum.mikrotik.com/t/7-23-4-long-term-is-released/272801'
    label: cvd@cert.pl
  - url: 'https://forum.mikrotik.com/t/7-24-2-stable-is-released/272800'
    label: cvd@cert.pl
  - url: 'https://mikrotik.com/supportsec/september-2026-vulnerability/'
    label: cvd@cert.pl
  - url: >-
      https://npratley.net/reversing-mikrotiks-silent-patch-the-routeros-7-23-4-fix-they-wouldnt-explain/
    label: cvd@cert.pl
  - url: 'https://forum.mikrotik.com/t/6-49-21-long-term-is-released/272802'
    label: cvd@cert.pl
tags:
  - nvd
  - cve.org
  - exploit-available
exploitAvailable: true
ssvc:
  exploitation: poc
  automatable: 'yes'
  technicalImpact: partial
  timestamp: '2026-09-08T15:31:52.946442Z'
cvssSource: cna
epss: 0.0045
epssPercentile: 0.38505
ingestedAt: '2026-09-06T13:55:47.630Z'
---

## Overview

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)

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.