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)
CVE-2026-67276
“▲” 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.
Also known asEUVD-2026-72024 (ENISA EUVD) · GHSA-j9wg-77fw-f22f (GitHub Security Advisories)Source: ENISA EUVD
- 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
The CVE record names the fixed release — apply it.
- CVSS v3
- 8.1
- EG Score
- 9.0CRITICALhigh confidence
- EG Risk
- 76EG 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, 2026Reversing 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/MikroTik · September 2026 vulnerability
https://mikrotik.com/supportsec/september-2026-vulnerability/7.24.2 [stable] is released! - Announcements - MikroTik community forum
https://forum.mikrotik.com/t/7-24-2-stable-is-released/2728007.23.4 [long-term] is released! - Announcements - MikroTik community forum
https://forum.mikrotik.com/t/7-23-4-long-term-is-released/272801Critical 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/Vulnerabilities in Mikrotik RouterOS software | CERT Polska
https://cert.pl/en/posts/2026/09/mikrotik-routeros-cve6.49.21 [long-term] is released! - Announcements - MikroTik community forum
https://forum.mikrotik.com/t/6-49-21-long-term-is-released/272802Vendor 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.
- 2026-11-02 00:26 UTCEG score recompute
- 2026-11-02 00:26 UTCGHSA enrichmentGHSA-j9wg-77fw-f22f · GitHub severity CRITICAL · GitHub CVSS 8.1
- 2026-11-01 16:35 UTCEPSS rescoreEPSS 8.9% · 95th percentile
- 2026-10-31 23:07 UTCEG score recompute
- 2026-10-31 23:07 UTCGHSA enrichmentGHSA-j9wg-77fw-f22f · GitHub severity CRITICAL · GitHub CVSS 8.1
- 2026-10-31 16:33 UTCEPSS rescoreEPSS 8.9% · 95th percentile
- 2026-10-30 21:49 UTCEG score recompute
- 2026-10-30 21:49 UTCGHSA enrichmentGHSA-j9wg-77fw-f22f · GitHub severity CRITICAL · GitHub CVSS 8.1
- 2026-10-30 16:35 UTCEPSS rescoreEPSS 8.9% · 95th percentile
- 2026-10-29 20:31 UTCEG score recompute
- 2026-10-29 20:31 UTCGHSA enrichmentGHSA-j9wg-77fw-f22f · GitHub severity CRITICAL · GitHub CVSS 8.1
- 2026-10-29 16:33 UTCEPSS rescoreEPSS 8.9% · 95th percentile
- 2026-10-28 19:13 UTCEG score recompute
- 2026-10-28 19:13 UTCGHSA enrichmentGHSA-j9wg-77fw-f22f · GitHub severity CRITICAL · GitHub CVSS 8.1
- 2026-10-28 16:33 UTCEPSS rescoreEPSS 8.9% · 95th percentile
- 2026-10-27 17:49 UTCEG score recompute
- 2026-10-27 17:49 UTCGHSA enrichmentGHSA-j9wg-77fw-f22f · GitHub severity CRITICAL · GitHub CVSS 8.1
- 2026-10-27 16:32 UTCEPSS rescoreEPSS 8.9% · 95th percentile
- 2026-10-26 16:32 UTCEPSS rescoreEPSS 8.9% · 95th percentile
- 2026-10-26 16:30 UTCGHSA enrichmentGHSA-j9wg-77fw-f22f · GitHub severity CRITICAL · GitHub CVSS 8.1
- 2026-10-26 15:32 UTCEG score recompute
- 2026-10-26 15:32 UTCGHSA enrichmentGHSA-j9wg-77fw-f22f · GitHub severity CRITICAL · GitHub CVSS 8.1
- 2026-10-25 16:33 UTCEPSS rescoreEPSS 8.9% · 95th percentile
- 2026-10-25 13:47 UTCEG score recompute▲ 0.90
- 2026-10-25 13:47 UTCGHSA enrichmentGHSA-j9wg-77fw-f22f · GitHub severity CRITICAL · GitHub CVSS 8.1
Show 75 moreShow fewer
- 2026-10-25 13:46 UTCENISA EU KEV listingEUVD-2026-72024 · listed September 5, 2026 · reported by CERT.PL · Source: ENISA EUVD
- 2026-10-24 16:33 UTCEPSS rescoreEPSS 6.5% · 93rd percentile
- 2026-10-23 16:32 UTCEPSS rescoreEPSS 6.5% · 93rd percentile
- 2026-10-22 16:35 UTCEPSS rescoreEPSS 6.5% · 93rd percentile
- 2026-10-21 16:33 UTCEPSS rescoreEPSS 6.5% · 93rd percentile
- 2026-10-20 18:39 UTCEG score recompute
- 2026-10-20 18:39 UTCGHSA enrichmentGHSA-j9wg-77fw-f22f · GitHub severity CRITICAL · GitHub CVSS 8.1
- 2026-10-20 16:33 UTCEPSS rescoreEPSS 6.5% · 93rd percentile
- 2026-10-19 16:32 UTCEPSS rescoreEPSS 6.5% · 93rd percentile
- 2026-10-18 16:32 UTCEPSS rescoreEPSS 6.5% · 93rd percentile
- 2026-10-18 03:20 UTCEG score recompute
- 2026-10-17 16:35 UTCEPSS rescoreEPSS 6.5% · 93rd percentile
- 2026-10-16 16:43 UTCEPSS rescoreEPSS 6.5% · 93rd percentile
- 2026-10-15 16:32 UTCEPSS rescoreEPSS 6.5% · 93rd percentile
- 2026-10-14 16:33 UTCEPSS rescoreEPSS 6.5% · 93rd percentile
- 2026-10-13 16:34 UTCEPSS rescoreEPSS 6.5% · 93rd percentile
- 2026-10-13 10:49 UTCEG score recompute
- 2026-10-13 10:49 UTCGHSA enrichmentGHSA-j9wg-77fw-f22f · GitHub severity CRITICAL · GitHub CVSS 8.1
- 2026-10-12 16:34 UTCEPSS rescoreEPSS 6.5% · 93rd percentile
- 2026-10-12 15:45 UTCEG score recompute
- 2026-10-11 19:30 UTCEG score recompute
- 2026-10-11 16:46 UTCEG score recompute
- 2026-10-11 14:07 UTCEG score recompute
- 2026-10-11 13:49 UTCEPSS rescoreEPSS 6.5% · 93rd percentile
- 2026-10-10 20:00 UTCEPSS rescoreEPSS 6.5% · 93rd percentile
- 2026-10-10 11:48 UTCGHSA enrichmentGHSA-j9wg-77fw-f22f · GitHub severity CRITICAL · GitHub CVSS 8.1
- 2026-10-09 22:55 UTCEG score recompute
- 2026-10-09 22:55 UTCGHSA enrichmentGHSA-j9wg-77fw-f22f · GitHub severity CRITICAL · GitHub CVSS 8.1
- 2026-10-09 20:07 UTCEPSS rescoreEPSS 6.5% · 93rd percentile
- 2026-10-09 01:01 UTCEG score recompute
- 2026-10-09 01:01 UTCGHSA enrichmentGHSA-j9wg-77fw-f22f · GitHub severity CRITICAL · GitHub CVSS 8.1
- 2026-10-08 17:13 UTCEPSS rescoreEPSS 6.5% · 93rd percentile
- 2026-10-07 23:48 UTCEPSS rescoreEPSS 6.5% · 93rd percentile
- 2026-10-07 22:52 UTCGHSA enrichmentGHSA-j9wg-77fw-f22f · GitHub severity CRITICAL · GitHub CVSS 8.1
- 2026-10-07 08:03 UTCGHSA enrichmentGHSA-j9wg-77fw-f22f · GitHub severity CRITICAL · GitHub CVSS 8.1
- 2026-10-06 19:12 UTCEG score recompute
- 2026-10-06 19:12 UTCGHSA enrichmentGHSA-j9wg-77fw-f22f · GitHub severity CRITICAL · GitHub CVSS 8.1
- 2026-10-06 15:18 UTCEPSS rescoreEPSS 6.5% · 93rd percentile
- 2026-10-06 06:21 UTCEG score recompute
- 2026-10-06 06:21 UTCGHSA enrichmentGHSA-j9wg-77fw-f22f · GitHub severity CRITICAL · GitHub CVSS 8.1
- 2026-10-05 17:43 UTCEPSS rescoreEPSS 6.5% · 93rd percentile
- 2026-10-05 16:38 UTCGHSA enrichmentGHSA-j9wg-77fw-f22f · GitHub severity CRITICAL · GitHub CVSS 8.1
- 2026-10-05 03:20 UTCEG score recompute
- 2026-10-05 03:20 UTCGHSA enrichmentGHSA-j9wg-77fw-f22f · GitHub severity CRITICAL · GitHub CVSS 8.1
- 2026-10-04 23:22 UTCEPSS rescoreEPSS 6.5% · 93rd percentile
- 2026-10-04 14:27 UTCGHSA enrichmentGHSA-j9wg-77fw-f22f · GitHub severity CRITICAL · GitHub CVSS 8.1
- 2026-10-04 01:21 UTCEG score recompute
- 2026-10-04 01:21 UTCGHSA enrichmentGHSA-j9wg-77fw-f22f · GitHub severity CRITICAL · GitHub CVSS 8.1
- 2026-10-03 14:26 UTCEPSS rescoreEPSS 6.5% · 93rd percentile
- 2026-10-03 12:29 UTCGHSA enrichmentGHSA-j9wg-77fw-f22f · GitHub severity CRITICAL · GitHub CVSS 8.1
- 2026-10-02 21:57 UTCEG score recompute
- 2026-10-02 21:57 UTCGHSA enrichmentGHSA-j9wg-77fw-f22f · GitHub severity CRITICAL · GitHub CVSS 8.1
- 2026-10-02 17:56 UTCEPSS rescoreEPSS 6.5% · 93rd percentile
- 2026-10-02 09:06 UTCGHSA enrichmentGHSA-j9wg-77fw-f22f · GitHub severity CRITICAL · GitHub CVSS 8.1
- 2026-10-01 20:10 UTCEG score recompute
- 2026-10-01 20:10 UTCGHSA enrichmentGHSA-j9wg-77fw-f22f · GitHub severity CRITICAL · GitHub CVSS 8.1
- 2026-10-01 19:50 UTCEPSS rescoreEPSS 6.5% · 93rd percentile
- 2026-10-01 07:15 UTCGHSA enrichmentGHSA-j9wg-77fw-f22f · GitHub severity CRITICAL · GitHub CVSS 8.1
- 2026-09-30 18:24 UTCEG score recompute
- 2026-09-30 18:24 UTCGHSA enrichmentGHSA-j9wg-77fw-f22f · GitHub severity CRITICAL · GitHub CVSS 8.1
- 2026-09-30 15:03 UTCEPSS rescoreEPSS 6.5% · 93rd percentile
- 2026-09-30 02:37 UTCEG score recompute
- 2026-09-30 02:37 UTCGHSA enrichmentGHSA-j9wg-77fw-f22f · GitHub severity CRITICAL · GitHub CVSS 8.1
- 2026-09-29 09:28 UTCEG score recompute
- 2026-09-29 09:28 UTCGHSA enrichmentGHSA-j9wg-77fw-f22f · GitHub severity CRITICAL · GitHub CVSS 8.1
- 2026-09-28 20:37 UTCEG score recompute
- 2026-09-28 20:37 UTCGHSA enrichmentGHSA-j9wg-77fw-f22f · GitHub severity CRITICAL · GitHub CVSS 8.1
- 2026-09-28 13:52 UTCEPSS rescoreEPSS 6.5% · 93rd percentile
- 2026-09-28 07:40 UTCGHSA enrichmentGHSA-j9wg-77fw-f22f · GitHub severity CRITICAL · GitHub CVSS 8.1
- 2026-09-27 18:49 UTCEG score recompute
- 2026-09-27 18:49 UTCGHSA enrichmentGHSA-j9wg-77fw-f22f · GitHub severity CRITICAL · GitHub CVSS 8.1
- 2026-09-27 13:48 UTCEPSS rescoreEPSS 6.5% · 93rd percentile
- 2026-09-27 05:58 UTCGHSA enrichmentGHSA-j9wg-77fw-f22f · GitHub severity CRITICAL · GitHub CVSS 8.1
- 2026-09-26 17:07 UTCEG score recompute
- 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_POCPublished Sep 9, 2026
Testing tool for the Mikrotrick exploit (CVE-2026-67276)
Open source ↗ - GitHub PoCBlackHatExploitation/exploit-mikrotik-2026Published Sep 7, 2026
CVE-2026-67276 MikroTik RouterOS SSH Authentication Bypass Exploit
Open source ↗ - GitHub PoCdinosn/mikrotrick-pocPublished Sep 6, 2026
CVE-2026-67276 RouterOS SSH public-key authentication bypass lab PoC
Open source ↗
Related CVEs(same CWE)
Frequently asked(5)
What is CVE-2026-67276?
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What is the CVSS score of CVE-2026-67276?
How do I remediate CVE-2026-67276?
Dependency Blast Radius
Explore the affected products and dependency analysis for CVE-2026-67276
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