CVE-2026-67279

MEDIUMPre-NVD 6.96.9—
EchelonGraph scoreMEDIUM confidence

This medium-severity CVE scores 6.9 under a secondary CVSS source (NVD's own analysis pending). EPSS exploit probability: 0.4%, top 62% of all CVEs by exploit prediction. GitHub Security Advisory data not yet ingested — confidence will rise once GHSA publishes (typical lag: hours to days for open-source ecosystem CVEs; never for infrastructure-only CVEs).

Triggered by: NVD CVSS baseline
Sources: epss, secondary
Trending — 3 sources updated this weekElevated
6.9EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 6.9Exploit: Elevated riskExposed: 0

No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.

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)

CVSS v3
6.9
EG Score
6.9(medium)
EG Risk
62(Attend)
EG Risk 62/100SSVC: Attend

EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).

How it’s computed
Severity69% × 45%
Exploitation40% × 40%
Automatability100% × 15%
Action: Remediate soon — notable exploitation risk.
EPSS PROB
0%
EPSS %ILE
38%
KEV
Not listed

Published

September 5, 2026

Last Modified

September 8, 2026

Advisory Details (7)

Auto-updated Sep 5, 2026
⚠️ Active exploitation confirmed. Patch available.
generic

7.24.2 [stable] is released! - Announcements - MikroTik community forum

https://forum.mikrotik.com/t/7-24-2-stable-is-released/272800
generic

7.23.4 [long-term] is released! - Announcements - MikroTik community forum

https://forum.mikrotik.com/t/7-23-4-long-term-is-released/272801
generic

6.49.21 [long-term] is released! - Announcements - MikroTik community forum

https://forum.mikrotik.com/t/6-49-21-long-term-is-released/272802
generic

MikroTik · September 2026 vulnerability

https://mikrotik.com/supportsec/september-2026-vulnerability/
generic

Reversing MikroTik's Silent Patch: The RouterOS 7.23.4 Fix They Wouldn't Explain | Nick Pratley

https://npratley.net/reversing-mikrotiks-silent-patch-the-routeros-7-23-4-fix-they-wouldnt-explain/
generic🔴 Active Exploitation

Critical vulnerabilities in MikroTik RouterOS are being actively exploited. Immediate update recommended | CERT Polska

https://cert.pl/en/posts/2026/09/vulnerabilities-in-mikrotik-routeros-actively-exploited/
generic Patch Available

Vulnerabilities in Mikrotik RouterOS software | CERT Polska

https://cert.pl/en/posts/2026/09/mikrotik-routeros-cve

Vendor Advisories for CVE-2026-67279(1)

These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Data Freshness Timeline

(refreshed 18× in last 7d / 43× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

  1. 2026-09-19 09:55 UTCEG score recompute
  2. 2026-09-19 09:55 UTCGHSA enrichment
  3. 2026-09-18 19:28 UTCEPSS rescore
  4. 2026-09-18 10:17 UTCEG score recompute
  5. 2026-09-18 10:17 UTCGHSA enrichment
  6. 2026-09-17 10:59 UTCEG score recompute
  7. 2026-09-17 10:58 UTCGHSA enrichment
  8. 2026-09-16 14:08 UTCEPSS rescore
  9. 2026-09-16 11:39 UTCEG score recompute
  10. 2026-09-16 11:39 UTCGHSA enrichment
  11. 2026-09-16 05:15 UTCEPSS rescore
  12. 2026-09-15 12:16 UTCEG score recompute
  13. 2026-09-15 12:16 UTCGHSA enrichment
  14. 2026-09-14 12:57 UTCEG score recompute
  15. 2026-09-14 12:57 UTCGHSA enrichment
  16. 2026-09-13 13:38 UTCEG score recompute
  17. 2026-09-13 13:38 UTCGHSA enrichment
  18. 2026-09-12 14:19 UTCGHSA enrichment
  19. 2026-09-11 15:00 UTCEG score recompute
  20. 2026-09-11 15:00 UTCGHSA enrichment
  21. 2026-09-11 14:53 UTCEPSS rescore
  22. 2026-09-11 09:37 UTCEPSS rescore
  23. 2026-09-10 15:41 UTCEG score recompute
  24. 2026-09-10 15:41 UTCGHSA enrichment
  25. 2026-09-09 16:22 UTCEG score recompute
Show 18 more
  1. 2026-09-09 16:22 UTCGHSA enrichment
  2. 2026-09-08 22:01 UTCEPSS rescore
  3. 2026-09-08 17:00 UTCEG score recompute
  4. 2026-09-08 17:00 UTCGHSA enrichment
  5. 2026-09-08 16:05 UTCEG score recompute
  6. 2026-09-08 16:05 UTCGHSA enrichment
  7. 2026-09-08 14:14 UTCGHSA enrichment
  8. 2026-09-07 19:55 UTCEG score recompute
  9. 2026-09-07 19:55 UTCGHSA enrichment
  10. 2026-09-07 16:01 UTCEPSS rescore
  11. 2026-09-06 20:36 UTCEG score recompute
  12. 2026-09-06 20:36 UTCGHSA enrichment
  13. 2026-09-06 13:47 UTCEPSS rescore
  14. 2026-09-05 21:17 UTCEG score recompute
  15. 2026-09-05 20:45 UTCEG score recompute
  16. 2026-09-05 20:24 UTCEG score recompute
  17. 2026-09-05 20:05 UTCEG score recompute
  18. 2026-09-05 20:05 UTCMITRE cvelistV5first tracked

Frequently asked(5)

What is CVE-2026-67279?
CVE-2026-67279 is a medium vulnerability published on September 5, 2026. 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…
When was CVE-2026-67279 disclosed?
CVE-2026-67279 was first published in the National Vulnerability Database on September 5, 2026, with the most recent update on September 8, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-67279 actively exploited?
CVE-2026-67279 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0% probability of exploitation in the next 30 days, which ranks it in the top 61.9% of all scored CVEs.
What is the CVSS score of CVE-2026-67279?
CVE-2026-67279 has a CVSS v3 base score of 6.9 (NVD).
How do I remediate CVE-2026-67279?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-67279, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

Dependency Blast Radius

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