# CVE-2026-67281

## Summary

- **CVE ID:** CVE-2026-67281
- **Severity:** HIGH
- **CVSS Score:** 8.7 (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-824, CWE-22
- **Published:** Sep 5, 2026
- **Last Modified:** Sep 8, 2026

## 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 was fixed in versions: 6.49.21 (Lont-term), 7.23.4 (Lont-term) and 7.24.2 (Stable)

## Affected Products

- Mikrotik — RouterOS (7.24)
- Mikrotik — RouterOS (7.0.0)
- Mikrotik — RouterOS (6.0.0)
- Mikrotik — RouterOS (7.20)

## References

- [CNA](https://cert.pl/en/posts/2026/09/mikrotik-routeros-cve)
- [CNA](https://cert.pl/en/posts/2026/09/vulnerabilities-in-mikrotik-routeros-actively-exploited/)
- [CNA](https://npratley.net/reversing-mikrotiks-silent-patch-the-routeros-7-23-4-fix-they-wouldnt-explain/)
- [CNA](https://mikrotik.com/supportsec/september-2026-vulnerability/)
- [CNA](https://forum.mikrotik.com/t/6-49-21-long-term-is-released/272802)
- [CNA](https://forum.mikrotik.com/t/7-23-4-long-term-is-released/272801)
- [CNA](https://forum.mikrotik.com/t/7-24-2-stable-is-released/272800)

## Exploitation Prediction (EPSS)

- **EPSS Score:** 0.45%
- **EPSS Percentile:** 37.9

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_Exported from OnDuty AI Vulnerability Intelligence on 2026-09-12._