CVE-2026-67276

CRITICALNVD 8.19.0
EchelonGraph scoreHIGH confidence

“▲” beside the score: it is higher than NVD's CVSS score.

Score elevated to 9.0 because this CVE is listed on ENISA's EU Known Exploited Vulnerabilities catalogue (Source: ENISA EUVD), indicating that ENISA records real-world exploitation of it. It is not on CISA's Known Exploited Vulnerabilities catalog. NVD baseline CVSS 8.1 retained for reference. The 9.0 is the floor for confirmed exploitation, not an impact rating: this CVE's impact severity (EG Severity) is CVSS 8.1 HIGH under GitHub Security Advisory CVSS. Confidence: HIGH.

Triggered by: ENISA EU KEV (actively exploited, as ENISA records it; Source: ENISA EUVD)
Sources: EPSS, ENISA's EU Known Exploited Vulnerabilities catalogue, GitHub Security Advisory, NVD CVSS v3
Trending — 3 sources updated this weekElevated

Also known asEUVD-2026-72024 (ENISA EUVD) · GHSA-j9wg-77fw-f22f (GitHub Security Advisories)Source: ENISA EUVD

9.0EG
EchelonGraph verdictPatch soonRemediate within your standard update timelines at low, sooner than that at medium and as soon as possible at high mission impact (the SSVC decision on this page).
  • Exploited in the wild, as ENISA's EU KEV records it (Source: ENISA EUVD); CISA has not listed it
  • Public exploit or proof-of-concept code is available
CISA-KEV: Not listedENISA EU KEV: Listed (Source: ENISA EUVD)EPSS PROB: 8.9%CVSS: 8.1Exploit: Public PoCExposed services: Not assessed

The CVE record names the fixed release — apply it.

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
8.1
EG Score
9.0CRITICALhigh confidence
EG Risk
76
EG Risk 76/100

EG Risk is EchelonGraph's 0–100 priority score. It fuses impact severity (EG Severity, the CVSS base score, never the KEV-floored or EPSS-lifted EG Score) with real-world exploitation and automatability, under weights EchelonGraph set by hand, so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner.

How it’s computed (value × EchelonGraph’s weight)
Severity81% × 45%
Impact severity (EG Severity): CVSS 8.1 of 10. Never the KEV-floored or EPSS-lifted EG Score.
Exploitation100% × 40%
Fixed at 100% for an ENISA EU KEV listing (CISA's catalog does not list this CVE): EchelonGraph's rule. Source: ENISA EUVD.
Automatability0% × 15%
CISA's SSVC Automatable value: no (Vulnrichment).
SSVC (CISA's decision table, applied by EchelonGraph): Track at low, Attend at medium and Act at high mission impact.
Exploitation active (ENISA EU KEV listing; Source: ENISA EUVD) · Automatable no (CISA Vulnrichment) · Technical impact total (CISA Vulnrichment). From CISA's SSVC values (Vulnrichment): automatable and technical impact; the others come from the sources named beside them. EchelonGraph applied CISA's decision table to them; CISA publishes SSVC inputs and the table, not a decision for each CVE.
Action: The CVE record names the fixed release. Apply it within your standard update timelines at low, sooner than that at medium and as soon as possible at high mission impact.
EPSS PROB
8.9%
EPSS %ILE
95th
KEV
Not in CISA'sENISA's EU KEV lists it (below). Source: ENISA EUVD

What the EG score is made of (scorer v4.0: the three questions the 0–10 score mixes, published apart · methodology)

The EG score (9.0): severity, escalated by confirmed exploitation. This CVE's 9.0 is the ENISA EU KEV floor for confirmed exploitation, not an impact rating: its impact severity (EG Severity) is CVSS 8.1 HIGH. Source: ENISA EUVD.

EG Severity
8.1 HIGHCVSS-B, impact only: no KEV listing, EPSS or EG-KEV tier raises it.GitHub Security Advisory CVSS
EG Likelihood
8.9% within 30 daysSource: FIRST EPSS (model v2026.06.15, score date 2026-11-01). FIRST's exploitation probability, not an EchelonGraph model.
Confirmed exploitation
ENISA EU KEV (Source: ENISA EUVD)Reported apart from the likelihood: an observed fact, not a probability.
EG Priority
SSVC Attend at medium mission impactTrack at low, Attend at medium and Act at high mission impact.CISA BOD 26-04: 14 days if the affected system is publicly exposed; Fix on system upgrade if it is not.Each input and its source, and whom BOD 26-04 binds: the SSVC and BOD 26-04 blocks below.

ENISA EU KEV: listed September 5, 2026, reported by CERT.PL; not on CISA's KEV catalog.

Source: ENISA EUVD (EU Known Exploited Vulnerabilities catalogue), reproduced with acknowledgement. How a listing moves the EG score

SSVC (CISA's decision table, applied by EchelonGraph)Track at low, Attend at medium and Act at high mission impact.

The CVE record names the fixed release. Apply it within your standard update timelines at low, sooner than that at medium and as soon as possible at high mission impact.

Exploitation active (ENISA EU KEV listing; Source: ENISA EUVD) · Automatable no (CISA Vulnrichment) · Technical impact total (CISA Vulnrichment). From CISA's SSVC values (Vulnrichment): automatable and technical impact; the others come from the sources named beside them. EchelonGraph applied CISA's decision table to them; CISA publishes SSVC inputs and the table, not a decision for each CVE. Mission impact is CISA's Mission & Well-being decision point, and only you can judge it. CISA's table makes it high when Mission Prevalence is Essential — the vulnerable component "directly provides capabilities that constitute at least one MEF for at least one entity" (MEF: mission essential function) — or when Public Well-Being Impact is Irreversible: "multiple fatalities are likely", the cyber-physical system "is likely lost or destroyed", "extreme or serious externalities" are imposed on other parties, or social systems such as elections or the financial grid "are destabilized and potentially collapse". CISA's decision table

BOD 26-04 (CISA's remediation timeline, Table 1)14 days if the affected system is publicly exposed; Fix on system upgrade if it is not.

The score's inputs: In CISA KEV no (CISA's KEV catalog) · Automatable no (CISA Vulnrichment) · Technical impact total (CISA Vulnrichment). Whether your system is publicly exposed is yours to answer. BOD 26-04 binds US Federal Civilian Executive Branch agencies; for anyone else it is CISA's published timeline, a reference rather than an obligation. The directive · how EchelonGraph applies it

Published

September 5, 2026

Last Modified

September 25, 2026

Advisory Details (7)

Auto-updated Sep 15, 2026
Fix named in the CVE record.
Web page

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/
Web page

MikroTik · September 2026 vulnerability

https://mikrotik.com/supportsec/september-2026-vulnerability/
Web page

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

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

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

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

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/
Web pageMentions a patch (unverified)

Vulnerabilities in Mikrotik RouterOS software | CERT Polska

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

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 18× in last 7d / 73× in last 30d)

Each row is a time one of our pipelines fetched, updated or re-scored this CVE. 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. An arrow marks a change the record states ("CVSS v3 → 9.1"); EPSS and GHSA rows show the values recorded at that time, not what changed (EPSS values are rounded; hover one for the exact figures). Most recent first.

Showing the most recent 100 of 261 refreshes on record for this CVE.

A repeat, a row identical to one the same pipeline wrote less than 10 seconds earlier, is not a separate refresh and is not counted. None are among the latest 100 rows. The 161 oldest rows on record are not shown and were not checked, so the counts can still include repeats.

  1. 2026-11-02 00:26 UTCEG score recompute
  2. 2026-11-02 00:26 UTCGHSA enrichmentGHSA-j9wg-77fw-f22f · GitHub severity CRITICAL · GitHub CVSS 8.1
  3. 2026-11-01 16:35 UTCEPSS rescoreEPSS 8.9% · 95th percentile
  4. 2026-10-31 23:07 UTCEG score recompute
  5. 2026-10-31 23:07 UTCGHSA enrichmentGHSA-j9wg-77fw-f22f · GitHub severity CRITICAL · GitHub CVSS 8.1
  6. 2026-10-31 16:33 UTCEPSS rescoreEPSS 8.9% · 95th percentile
  7. 2026-10-30 21:49 UTCEG score recompute
  8. 2026-10-30 21:49 UTCGHSA enrichmentGHSA-j9wg-77fw-f22f · GitHub severity CRITICAL · GitHub CVSS 8.1
  9. 2026-10-30 16:35 UTCEPSS rescoreEPSS 8.9% · 95th percentile
  10. 2026-10-29 20:31 UTCEG score recompute
  11. 2026-10-29 20:31 UTCGHSA enrichmentGHSA-j9wg-77fw-f22f · GitHub severity CRITICAL · GitHub CVSS 8.1
  12. 2026-10-29 16:33 UTCEPSS rescoreEPSS 8.9% · 95th percentile
  13. 2026-10-28 19:13 UTCEG score recompute
  14. 2026-10-28 19:13 UTCGHSA enrichmentGHSA-j9wg-77fw-f22f · GitHub severity CRITICAL · GitHub CVSS 8.1
  15. 2026-10-28 16:33 UTCEPSS rescoreEPSS 8.9% · 95th percentile
  16. 2026-10-27 17:49 UTCEG score recompute
  17. 2026-10-27 17:49 UTCGHSA enrichmentGHSA-j9wg-77fw-f22f · GitHub severity CRITICAL · GitHub CVSS 8.1
  18. 2026-10-27 16:32 UTCEPSS rescoreEPSS 8.9% · 95th percentile
  19. 2026-10-26 16:32 UTCEPSS rescoreEPSS 8.9% · 95th percentile
  20. 2026-10-26 16:30 UTCGHSA enrichmentGHSA-j9wg-77fw-f22f · GitHub severity CRITICAL · GitHub CVSS 8.1
  21. 2026-10-26 15:32 UTCEG score recompute
  22. 2026-10-26 15:32 UTCGHSA enrichmentGHSA-j9wg-77fw-f22f · GitHub severity CRITICAL · GitHub CVSS 8.1
  23. 2026-10-25 16:33 UTCEPSS rescoreEPSS 8.9% · 95th percentile
  24. 2026-10-25 13:47 UTCEG score recompute▲ 0.90
  25. 2026-10-25 13:47 UTCGHSA enrichmentGHSA-j9wg-77fw-f22f · GitHub severity CRITICAL · GitHub CVSS 8.1
Show 75 more
  1. 2026-10-25 13:46 UTCENISA EU KEV listingEUVD-2026-72024 · listed September 5, 2026 · reported by CERT.PL · Source: ENISA EUVD
  2. 2026-10-24 16:33 UTCEPSS rescoreEPSS 6.5% · 93rd percentile
  3. 2026-10-23 16:32 UTCEPSS rescoreEPSS 6.5% · 93rd percentile
  4. 2026-10-22 16:35 UTCEPSS rescoreEPSS 6.5% · 93rd percentile
  5. 2026-10-21 16:33 UTCEPSS rescoreEPSS 6.5% · 93rd percentile
  6. 2026-10-20 18:39 UTCEG score recompute
  7. 2026-10-20 18:39 UTCGHSA enrichmentGHSA-j9wg-77fw-f22f · GitHub severity CRITICAL · GitHub CVSS 8.1
  8. 2026-10-20 16:33 UTCEPSS rescoreEPSS 6.5% · 93rd percentile
  9. 2026-10-19 16:32 UTCEPSS rescoreEPSS 6.5% · 93rd percentile
  10. 2026-10-18 16:32 UTCEPSS rescoreEPSS 6.5% · 93rd percentile
  11. 2026-10-18 03:20 UTCEG score recompute
  12. 2026-10-17 16:35 UTCEPSS rescoreEPSS 6.5% · 93rd percentile
  13. 2026-10-16 16:43 UTCEPSS rescoreEPSS 6.5% · 93rd percentile
  14. 2026-10-15 16:32 UTCEPSS rescoreEPSS 6.5% · 93rd percentile
  15. 2026-10-14 16:33 UTCEPSS rescoreEPSS 6.5% · 93rd percentile
  16. 2026-10-13 16:34 UTCEPSS rescoreEPSS 6.5% · 93rd percentile
  17. 2026-10-13 10:49 UTCEG score recompute
  18. 2026-10-13 10:49 UTCGHSA enrichmentGHSA-j9wg-77fw-f22f · GitHub severity CRITICAL · GitHub CVSS 8.1
  19. 2026-10-12 16:34 UTCEPSS rescoreEPSS 6.5% · 93rd percentile
  20. 2026-10-12 15:45 UTCEG score recompute
  21. 2026-10-11 19:30 UTCEG score recompute
  22. 2026-10-11 16:46 UTCEG score recompute
  23. 2026-10-11 14:07 UTCEG score recompute
  24. 2026-10-11 13:49 UTCEPSS rescoreEPSS 6.5% · 93rd percentile
  25. 2026-10-10 20:00 UTCEPSS rescoreEPSS 6.5% · 93rd percentile
  26. 2026-10-10 11:48 UTCGHSA enrichmentGHSA-j9wg-77fw-f22f · GitHub severity CRITICAL · GitHub CVSS 8.1
  27. 2026-10-09 22:55 UTCEG score recompute
  28. 2026-10-09 22:55 UTCGHSA enrichmentGHSA-j9wg-77fw-f22f · GitHub severity CRITICAL · GitHub CVSS 8.1
  29. 2026-10-09 20:07 UTCEPSS rescoreEPSS 6.5% · 93rd percentile
  30. 2026-10-09 01:01 UTCEG score recompute
  31. 2026-10-09 01:01 UTCGHSA enrichmentGHSA-j9wg-77fw-f22f · GitHub severity CRITICAL · GitHub CVSS 8.1
  32. 2026-10-08 17:13 UTCEPSS rescoreEPSS 6.5% · 93rd percentile
  33. 2026-10-07 23:48 UTCEPSS rescoreEPSS 6.5% · 93rd percentile
  34. 2026-10-07 22:52 UTCGHSA enrichmentGHSA-j9wg-77fw-f22f · GitHub severity CRITICAL · GitHub CVSS 8.1
  35. 2026-10-07 08:03 UTCGHSA enrichmentGHSA-j9wg-77fw-f22f · GitHub severity CRITICAL · GitHub CVSS 8.1
  36. 2026-10-06 19:12 UTCEG score recompute
  37. 2026-10-06 19:12 UTCGHSA enrichmentGHSA-j9wg-77fw-f22f · GitHub severity CRITICAL · GitHub CVSS 8.1
  38. 2026-10-06 15:18 UTCEPSS rescoreEPSS 6.5% · 93rd percentile
  39. 2026-10-06 06:21 UTCEG score recompute
  40. 2026-10-06 06:21 UTCGHSA enrichmentGHSA-j9wg-77fw-f22f · GitHub severity CRITICAL · GitHub CVSS 8.1
  41. 2026-10-05 17:43 UTCEPSS rescoreEPSS 6.5% · 93rd percentile
  42. 2026-10-05 16:38 UTCGHSA enrichmentGHSA-j9wg-77fw-f22f · GitHub severity CRITICAL · GitHub CVSS 8.1
  43. 2026-10-05 03:20 UTCEG score recompute
  44. 2026-10-05 03:20 UTCGHSA enrichmentGHSA-j9wg-77fw-f22f · GitHub severity CRITICAL · GitHub CVSS 8.1
  45. 2026-10-04 23:22 UTCEPSS rescoreEPSS 6.5% · 93rd percentile
  46. 2026-10-04 14:27 UTCGHSA enrichmentGHSA-j9wg-77fw-f22f · GitHub severity CRITICAL · GitHub CVSS 8.1
  47. 2026-10-04 01:21 UTCEG score recompute
  48. 2026-10-04 01:21 UTCGHSA enrichmentGHSA-j9wg-77fw-f22f · GitHub severity CRITICAL · GitHub CVSS 8.1
  49. 2026-10-03 14:26 UTCEPSS rescoreEPSS 6.5% · 93rd percentile
  50. 2026-10-03 12:29 UTCGHSA enrichmentGHSA-j9wg-77fw-f22f · GitHub severity CRITICAL · GitHub CVSS 8.1
  51. 2026-10-02 21:57 UTCEG score recompute
  52. 2026-10-02 21:57 UTCGHSA enrichmentGHSA-j9wg-77fw-f22f · GitHub severity CRITICAL · GitHub CVSS 8.1
  53. 2026-10-02 17:56 UTCEPSS rescoreEPSS 6.5% · 93rd percentile
  54. 2026-10-02 09:06 UTCGHSA enrichmentGHSA-j9wg-77fw-f22f · GitHub severity CRITICAL · GitHub CVSS 8.1
  55. 2026-10-01 20:10 UTCEG score recompute
  56. 2026-10-01 20:10 UTCGHSA enrichmentGHSA-j9wg-77fw-f22f · GitHub severity CRITICAL · GitHub CVSS 8.1
  57. 2026-10-01 19:50 UTCEPSS rescoreEPSS 6.5% · 93rd percentile
  58. 2026-10-01 07:15 UTCGHSA enrichmentGHSA-j9wg-77fw-f22f · GitHub severity CRITICAL · GitHub CVSS 8.1
  59. 2026-09-30 18:24 UTCEG score recompute
  60. 2026-09-30 18:24 UTCGHSA enrichmentGHSA-j9wg-77fw-f22f · GitHub severity CRITICAL · GitHub CVSS 8.1
  61. 2026-09-30 15:03 UTCEPSS rescoreEPSS 6.5% · 93rd percentile
  62. 2026-09-30 02:37 UTCEG score recompute
  63. 2026-09-30 02:37 UTCGHSA enrichmentGHSA-j9wg-77fw-f22f · GitHub severity CRITICAL · GitHub CVSS 8.1
  64. 2026-09-29 09:28 UTCEG score recompute
  65. 2026-09-29 09:28 UTCGHSA enrichmentGHSA-j9wg-77fw-f22f · GitHub severity CRITICAL · GitHub CVSS 8.1
  66. 2026-09-28 20:37 UTCEG score recompute
  67. 2026-09-28 20:37 UTCGHSA enrichmentGHSA-j9wg-77fw-f22f · GitHub severity CRITICAL · GitHub CVSS 8.1
  68. 2026-09-28 13:52 UTCEPSS rescoreEPSS 6.5% · 93rd percentile
  69. 2026-09-28 07:40 UTCGHSA enrichmentGHSA-j9wg-77fw-f22f · GitHub severity CRITICAL · GitHub CVSS 8.1
  70. 2026-09-27 18:49 UTCEG score recompute
  71. 2026-09-27 18:49 UTCGHSA enrichmentGHSA-j9wg-77fw-f22f · GitHub severity CRITICAL · GitHub CVSS 8.1
  72. 2026-09-27 13:48 UTCEPSS rescoreEPSS 6.5% · 93rd percentile
  73. 2026-09-27 05:58 UTCGHSA enrichmentGHSA-j9wg-77fw-f22f · GitHub severity CRITICAL · GitHub CVSS 8.1
  74. 2026-09-26 17:07 UTCEG score recompute
  75. 2026-09-26 17:06 UTCGHSA enrichmentGHSA-j9wg-77fw-f22f · GitHub severity CRITICAL · GitHub CVSS 8.1

Publicly available exploits

(3 references)

Public exploit code is referenced for this CVE (3 GitHub PoCs). Defenders should treat patch urgency accordingly.

  • GitHub PoC4rt-Net/Mikrotrick_POC
    Published Sep 9, 2026

    Testing tool for the Mikrotrick exploit (CVE-2026-67276)

    Open source ↗
  • GitHub PoCBlackHatExploitation/exploit-mikrotik-2026
    Published Sep 7, 2026

    CVE-2026-67276 MikroTik RouterOS SSH Authentication Bypass Exploit

    Open source ↗
  • GitHub PoCdinosn/mikrotrick-poc
    Published 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-severity vulnerability; its CVE record was 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 made public?
CVE-2026-67276 was made public on September 5, 2026: that is the date its CVE record's CNA, CERT.PL, gives for when the vulnerability was made public. The CVE record itself was published on September 5, 2026. EchelonGraph's copy of the record carries a last-modified date of September 25, 2026; the record at its source may have been updated since.
Is CVE-2026-67276 actively exploited?
CVE-2026-67276 is not currently on CISA's Known Exploited Vulnerabilities catalog. ENISA's EU Known Exploited Vulnerabilities catalogue lists CVE-2026-67276 (added September 5, 2026, reported by CERT.PL): ENISA records its exploitation in the wild. Source: ENISA EUVD (EU Known Exploited Vulnerabilities catalogue), reproduced with acknowledgement. FIRST EPSS estimates a 8.9% probability of exploitation in the next 30 days (95th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-67276?
CVE-2026-67276 has a CVSS v3 base score of 8.1 (NVD). EchelonGraph synthesises NVD + ENISA's EU KEV (Source: ENISA EUVD) + FIRST EPSS + GHSA into a combined EG score of 9.0 (CRITICAL).
How do I remediate CVE-2026-67276?
The CVE record for CVE-2026-67276 names the fix: "…was fixed in versions: 7.23.4 (Long-term) and 7.24.2 (Stable)". The vendor advisories EchelonGraph has for CVE-2026-67276 are linked in the Vendor Advisories panel on this page.

Dependency Blast Radius

Explore the affected products and dependency analysis for CVE-2026-67276

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