{"schemaVersion":3,"id":"CVE-2026-67276","aliases":[],"status":"published","duplicateOf":null,"title":"MikroTrick","description":"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. 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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 was fixed in versions: 6.49.21 (Long-term), 7.23.4 (Long-term) and 7.24.2 (Stable)","notes":[{"type":"url","href":"https://cert.pl/en/posts/2026/09/vulnerabilities-in-mikrotik-routeros-actively-exploited/","label":"cert.pl/en/posts/2026/09/vulnerabilities-in-mikrotik-routeros-actively-exploited/"}],"vendor":"MikroTik","product":"RouterOS","ransomware":false,"ransomwareUse":null,"exploitationType":"unknown"}],"listedCount":1,"totalCatalogs":3,"catalogs":[{"source":"cisa","label":"CISA","listed":false,"entry":null},{"source":"enisa","label":"ENISA","listed":true,"entry":{"source":"enisa","sourceLabel":"ENISA","dateAdded":"2026-09-05T00:00:00.000Z","dueDate":null,"requiredAction":null,"name":"MikroTrick","description":"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 was fixed in versions: 6.49.21 (Long-term), 7.23.4 (Long-term) and 7.24.2 (Stable)","notes":[{"type":"url","href":"https://cert.pl/en/posts/2026/09/vulnerabilities-in-mikrotik-routeros-actively-exploited/","label":"cert.pl/en/posts/2026/09/vulnerabilities-in-mikrotik-routeros-actively-exploited/"}],"vendor":"MikroTik","product":"RouterOS","ransomware":false,"ransomwareUse":null,"exploitationType":"unknown"}},{"source":"circl","label":"CIRCL","listed":false,"entry":null}]},"ransomware":{"state":"none-recorded","sources":[]},"exploits":[{"id":"REF_F219796D3E196329","name":"Exploit Reference (npratley.net)","source":"reference","url":"https://npratley.net/reversing-mikrotiks-silent-patch-the-routeros-7-23-4-fix-they-wouldnt-explain/","maturity":"unknown","reliabilityScore":0.2,"verified":false,"type":null,"platforms":[],"requiresAuth":null,"exploitdb":null,"metasploit":null}],"exploitCount":1,"weaknesses":[{"id":"CWE-347","name":"Improper Verification of Cryptographic Signature","description":"The product does not verify, or incorrectly verifies, the cryptographic signature for data.","type":"weakness","status":"Draft","abstraction":"Base","likelihoodOfExploit":null,"url":"https://cwe.mitre.org/data/definitions/347.html"}],"affected":[{"vendor":"mikrotik","product":"routeros","name":"RouterOS","label":"routeros","ecosystem":null,"cpePart":"a","purl":null,"purlType":null,"versions":[{"text":"≥ 7.9, < 7.23.4","noFixRecorded":false,"fixedIn":null},{"text":"≥ 7.24, < 7.24.2","noFixRecorded":false,"fixedIn":null}],"versionsText":"≥ 7.9, < 7.23.4 | ≥ 7.24, < 7.24.2","eol":{"isEol":null,"eolDate":null,"matchMethod":"cpe","cycle":null,"product":{"name":"routeros","label":"RouterOS","category":"os"}},"hubHref":"/vendor/mikrotik/routeros"}],"affectedCount":1,"eol":{"hasEol":false,"count":0},"references":[{"url":"https://cert.pl/en/posts/2026/09/mikrotik-routeros-cve","label":"cert.pl/en/posts/2026/09/mikrotik-routeros-cve","hostname":"cert.pl","tags":["Third Party Advisory"]},{"url":"https://cert.pl/en/posts/2026/09/vulnerabilities-in-mikrotik-routeros-actively-exploited/","label":"cert.pl/en/posts/2026/09/vulnerabilities-in-mikrotik-routeros-actively-exploited/","hostname":"cert.pl","tags":["Technical Description","Mitigation","Third Party Advisory"]},{"url":"https://npratley.net/reversing-mikrotiks-silent-patch-the-routeros-7-23-4-fix-they-wouldnt-explain/","label":"npratley.net/reversing-mikrotiks-silent-patch-the-routeros-7-23-4-fix-they-wouldnt-explain/","hostname":"npratley.net","tags":["Exploit","Third Party Advisory"]},{"url":"https://mikrotik.com/supportsec/september-2026-vulnerability/","label":"mikrotik.com/supportsec/september-2026-vulnerability/","hostname":"mikrotik.com","tags":["Vendor Advisory"]},{"url":"https://forum.mikrotik.com/t/7-23-4-long-term-is-released/272801","label":"forum.mikrotik.com/t/7-23-4-long-term-is-released/272801","hostname":"forum.mikrotik.com","tags":["Release Notes"]},{"url":"https://forum.mikrotik.com/t/7-24-2-stable-is-released/272800","label":"forum.mikrotik.com/t/7-24-2-stable-is-released/272800","hostname":"forum.mikrotik.com","tags":["Release Notes"]}],"lineage":{"upstream":[],"downstream":[],"duplicates":[],"related":[]},"timeline":[{"kind":"published","date":"2026-09-05T20:00:55.811Z","label":"Published","detail":"Vulnerability first disclosed.","source":null},{"kind":"kev-added","date":"2026-09-05T00:00:00.000Z","label":"Added to ENISA KEV","detail":"MikroTrick","source":"enisa"},{"kind":"modified","date":"2026-09-09T04:26:19.218Z","label":"Last modified","detail":"Vulnerability information updated.","source":null}],"risk":{"score":85,"level":"critical","profile":"Default","thresholds":{"critical":75,"high":50,"medium":25,"low":10}},"meta":{"dataAsOf":"2026-10-22T18:25:40.324Z","stale":false,"partial":false}}