CVE-2026-67276

CRITICALPre-NVD 9.29.2—
EchelonGraph scoreMEDIUM confidence

This critical-severity CVE scores 9.2 under a secondary CVSS source (NVD's own analysis pending). EPSS exploit probability: 0.2%, top 84% 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
9.2EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 9.2Exploit: Elevated riskExposed: 0

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

RouterOS does not compare the complete RSA public key when matching an SSH authentication request to an authorized user key, checking the key type and modulus but omitting the exponent. Because signature verification uses the client-supplied key, an attacker knowing an authorized RSA modulus can supply a key with exponent one, forge a valid signature, and open an SSH command channel as the target user without the private key.This issue affects only 7.x branch was fixed in versions: 7.23.4 (Long-term) and 7.24.2 (Stable)

CVSS v3
9.2
EG Score
9.2(medium)
EG Risk
57(Track)
EG Risk 57/100SSVC: Track

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
Severity92% × 45%
Exploitation40% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
16%
KEV
Not listed

Published

September 5, 2026

Last Modified

September 9, 2026

Advisory Details (7)

Auto-updated Sep 15, 2026
⚠️ Active exploitation confirmed. Patch available.
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

MikroTik · September 2026 vulnerability

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

Vendor Advisories for CVE-2026-67276(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 49× in last 7d / 117× 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.

Showing the most recent 100 of 117 total refreshes for this CVE.

  1. 2026-09-19 23:06 UTCGHSA enrichment
  2. 2026-09-19 18:52 UTCEG score recompute
  3. 2026-09-19 18:52 UTCGHSA enrichment
  4. 2026-09-19 14:35 UTCGHSA enrichment
  5. 2026-09-19 10:20 UTCGHSA enrichment
  6. 2026-09-19 06:07 UTCGHSA enrichment
  7. 2026-09-19 01:54 UTCGHSA enrichment
  8. 2026-09-18 21:40 UTCEG score recompute
  9. 2026-09-18 21:40 UTCGHSA enrichment
  10. 2026-09-18 19:28 UTCEPSS rescore
  11. 2026-09-18 17:27 UTCGHSA enrichment
  12. 2026-09-18 13:14 UTCGHSA enrichment
  13. 2026-09-18 09:01 UTCGHSA enrichment
  14. 2026-09-18 04:48 UTCGHSA enrichment
  15. 2026-09-18 00:35 UTCGHSA enrichment
  16. 2026-09-17 20:22 UTCEG score recompute
  17. 2026-09-17 20:22 UTCGHSA enrichment
  18. 2026-09-17 15:43 UTCGHSA enrichment
  19. 2026-09-17 11:29 UTCGHSA enrichment
  20. 2026-09-17 07:16 UTCGHSA enrichment
  21. 2026-09-17 02:59 UTCGHSA enrichment
  22. 2026-09-16 22:34 UTCGHSA enrichment
  23. 2026-09-16 18:20 UTCEG score recompute
  24. 2026-09-16 18:20 UTCGHSA enrichment
  25. 2026-09-16 14:08 UTCEPSS rescore
Show 75 more
  1. 2026-09-16 13:15 UTCGHSA enrichment
  2. 2026-09-16 08:59 UTCEG score recompute
  3. 2026-09-16 08:59 UTCGHSA enrichment
  4. 2026-09-16 05:15 UTCEPSS rescore
  5. 2026-09-16 03:35 UTCGHSA enrichment
  6. 2026-09-15 23:22 UTCGHSA enrichment
  7. 2026-09-15 18:41 UTCGHSA enrichment
  8. 2026-09-15 14:27 UTCGHSA enrichment
  9. 2026-09-15 10:14 UTCGHSA enrichment
  10. 2026-09-15 06:00 UTCEG score recompute
  11. 2026-09-15 06:00 UTCGHSA enrichment
  12. 2026-09-15 01:47 UTCGHSA enrichment
  13. 2026-09-14 21:34 UTCGHSA enrichment
  14. 2026-09-14 17:19 UTCGHSA enrichment
  15. 2026-09-14 13:06 UTCGHSA enrichment
  16. 2026-09-14 08:53 UTCGHSA enrichment
  17. 2026-09-14 04:40 UTCGHSA enrichment
  18. 2026-09-14 00:27 UTCGHSA enrichment
  19. 2026-09-13 20:14 UTCEG score recompute
  20. 2026-09-13 20:14 UTCGHSA enrichment
  21. 2026-09-13 16:01 UTCGHSA enrichment
  22. 2026-09-13 11:48 UTCGHSA enrichment
  23. 2026-09-13 07:34 UTCGHSA enrichment
  24. 2026-09-13 03:21 UTCGHSA enrichment
  25. 2026-09-12 23:08 UTCGHSA enrichment
  26. 2026-09-12 18:55 UTCEG score recompute
  27. 2026-09-12 18:55 UTCGHSA enrichment
  28. 2026-09-12 14:41 UTCGHSA enrichment
  29. 2026-09-12 10:28 UTCGHSA enrichment
  30. 2026-09-12 06:14 UTCGHSA enrichment
  31. 2026-09-12 02:00 UTCGHSA enrichment
  32. 2026-09-11 21:47 UTCGHSA enrichment
  33. 2026-09-11 17:34 UTCEG score recompute
  34. 2026-09-11 17:34 UTCGHSA enrichment
  35. 2026-09-11 14:53 UTCEPSS rescore
  36. 2026-09-11 13:20 UTCEG score recompute
  37. 2026-09-11 13:20 UTCGHSA enrichment
  38. 2026-09-11 09:37 UTCEPSS rescore
  39. 2026-09-11 09:07 UTCGHSA enrichment
  40. 2026-09-11 04:54 UTCGHSA enrichment
  41. 2026-09-11 00:41 UTCGHSA enrichment
  42. 2026-09-10 20:28 UTCGHSA enrichment
  43. 2026-09-10 16:15 UTCGHSA enrichment
  44. 2026-09-10 11:59 UTCEG score recompute
  45. 2026-09-10 11:59 UTCGHSA enrichment
  46. 2026-09-10 07:46 UTCGHSA enrichment
  47. 2026-09-10 03:33 UTCGHSA enrichment
  48. 2026-09-09 23:20 UTCGHSA enrichment
  49. 2026-09-09 18:11 UTCGHSA enrichment
  50. 2026-09-09 13:58 UTCGHSA enrichment
  51. 2026-09-09 09:45 UTCGHSA enrichment
  52. 2026-09-09 05:32 UTCEG score recompute
  53. 2026-09-09 05:32 UTCGHSA enrichment
  54. 2026-09-09 04:41 UTCEG score recompute
  55. 2026-09-09 04:41 UTCGHSA enrichment
  56. 2026-09-09 03:17 UTCGHSA enrichment
  57. 2026-09-08 23:04 UTCEG score recompute
  58. 2026-09-08 23:04 UTCGHSA enrichment
  59. 2026-09-08 22:01 UTCEPSS rescore
  60. 2026-09-08 16:05 UTCEG score recompute
  61. 2026-09-08 16:05 UTCGHSA enrichment
  62. 2026-09-08 15:13 UTCEG score recompute
  63. 2026-09-08 15:12 UTCGHSA enrichment
  64. 2026-09-08 14:14 UTCGHSA enrichment
  65. 2026-09-08 11:43 UTCGHSA enrichment
  66. 2026-09-08 07:25 UTCGHSA enrichment
  67. 2026-09-08 03:12 UTCGHSA enrichment
  68. 2026-09-07 22:59 UTCGHSA enrichment
  69. 2026-09-07 18:46 UTCEG score recompute
  70. 2026-09-07 18:46 UTCGHSA enrichment
  71. 2026-09-07 16:01 UTCEPSS rescore
  72. 2026-09-07 14:33 UTCEG score recompute
  73. 2026-09-07 14:32 UTCGHSA enrichment
  74. 2026-09-07 13:38 UTCEG score recompute
  75. 2026-09-07 13:37 UTCGHSA enrichment

Publicly available exploits

(2 references)

Working exploit code is in the public domain (2 GitHub PoCs). Defenders should treat patch urgency accordingly — public PoCs typically lead to mass-exploitation within 24-72 hours.

  • GitHub PoCBlackHatExploitation/exploit-mikrotik-2026
    First seen Sep 7, 2026

    CVE-2026-67276 MikroTik RouterOS SSH Authentication Bypass Exploit

    Open source ↗
  • GitHub PoCdinosn/mikrotrick-poc
    First seen Sep 6, 2026

    CVE-2026-67276 RouterOS SSH public-key authentication bypass lab PoC

    Open source ↗

Frequently asked(5)

What is CVE-2026-67276?
CVE-2026-67276 is a critical vulnerability published on September 5, 2026. RouterOS does not compare the complete RSA public key when matching an SSH authentication request to an authorized user key, checking the key type and modulus but omitting the exponent. Because signature verification uses the client-supplied key, an attacker knowing an authorized RSA modulus can…
When was CVE-2026-67276 disclosed?
CVE-2026-67276 was first published in the National Vulnerability Database on September 5, 2026, with the most recent update on September 9, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-67276 actively exploited?
CVE-2026-67276 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 84.2% of all scored CVEs.
What is the CVSS score of CVE-2026-67276?
CVE-2026-67276 has a CVSS v3 base score of 9.2 (NVD).
How do I remediate CVE-2026-67276?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-67276, 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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