AEGLIX vulnerability intelligence
CVE-2026-67279
MEDIUM · CVSS 6.9 · Analyzed
Published: 2026-09-05 · Updated: 2026-09-26 · Source: NVD
Vulnerability overview
RouterOS SSH enters the connection protocol after a client-requested rekey even though user authentication was never attempted, allowing an unauthenticated client to open a session channel and send an exec request. On affected builds the server dispatches the command, enabling unauthenticated creation, overwrite, and reconstruction of files in the RouterOS managed file namespace, including support files containing configuration and diagnostic data.This issue was fixed in versions: 6.49.21 (Long-term), 7.23.4 (Long-term) and 7.24.2 (Stable)
Severity and scoring
- CVSS score
- 6.9 · MEDIUM
- CVSS version
- 4.0
- CVSS vector
- CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
- Weaknesses
- CWE-841
CVSS measures technical severity; it does not establish whether this vulnerability is being exploited in your environment.
Known exploitation and remediation
Listed in CISA’s Known Exploited Vulnerabilities catalog.
- Affected product
- MikroTik · RouterOS
- Added to catalog
- 2026-09-25
- Required action
- Apply mitigations in accordance with vendor instructions, ensuring compliance with CISA’s BOD 26-04 Prioritizing Security Updates Based on Risk (see URL in Notes) guidance and CISA’s “Forensics Triage Requirements” (see URL in Notes). Follow applicable BOD 26-04 guidance for cloud services or discontinue use of the product if mitigations are unavailable. Stakeholders are responsible for evaluating each asset's internet exposure and ensuring adherence to BOD 26-04 patching guidelines.
- CISA remediation due date
- 2026-09-28
CISA deadlines apply to the organizations covered by its directives. Confirm your own remediation requirements.
Verify affected versions and patch availability in the vendor advisory before making changes.
Affected products and versions
cpe:2.3:o:mikrotik:routeros:*:*:*:*:*:*:*:*
From (inclusive): 6.0
Before (exclusive): 6.49.21
cpe:2.3:o:mikrotik:routeros:*:*:*:*:*:*:*:*
From (inclusive): 7.0
Before (exclusive): 7.23.4
cpe:2.3:o:mikrotik:routeros:*:*:*:*:*:*:*:*
From (inclusive): 7.24
Before (exclusive): 7.24.2
These are NVD CPE applicability entries. Some products depend on configuration conditions; consult the official record to confirm applicability.
Advisories and references
- https://cert.pl/en/posts/2026/09/mikrotik-routeros-cve
Third Party Advisory
- https://cert.pl/en/posts/2026/09/vulnerabilities-in-mikrotik-routeros-actively-exploited/
Mitigation · Third Party Advisory
- https://forum.mikrotik.com/t/6-49-21-long-term-is-released/272802
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
Release Notes
- https://mikrotik.com/supportsec/september-2026-vulnerability/
Vendor Advisory
- https://npratley.net/reversing-mikrotiks-silent-patch-the-routeros-7-23-4-fix-they-wouldnt-explain/
Exploit · Third Party Advisory
- https://bishopfox.com/blog/mikrotrick-inside-the-routeros-takeover-chain
Third Party Advisory
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-67279
US Government Resource