{"resultsPerPage":1,"startIndex":0,"totalResults":1,"format":"NVD_CVE","version":"2.0","timestamp":"2026-10-01T02:34:01.316","vulnerabilities":[{"cve":{"id":"CVE-2026-67277","sourceIdentifier":"cvd@cert.pl","published":"2026-09-05T20:17:18.120","lastModified":"2026-09-11T12:52:29.533","vulnStatus":"Analyzed","cveTags":[],"descriptions":[{"lang":"en","value":"RouterOS accepts a \"related\" btest connection before the corresponding primary session has completed authentication. An unauthenticated client can use this state to start an IPv4 UDP test. With \"random-data=false\", the sender transmits an uninitialized tail from a kernel packet buffer. A separate unchecked, inverted packet-size interval causes unsigned integer underflow, anomalously large fragmented output, and can restart the RouterOS kernel.\n\n\n\nThis issue was fixed in versions: 6.49.21 (Long-term), 7.23.4 (Long-term) and 7.24.2 (Stable)"}],"affected":[{"source":"cvd@cert.pl","affectedData":[{"vendor":"Mikrotik","product":"RouterOS","defaultStatus":"unaffected","versions":[{"version":"7.24","lessThan":"7.24.2","versionType":"custom","status":"affected"},{"version":"7.0.0","lessThan":"7.23.4","versionType":"custom","status":"affected"},{"version":"6.0.0","lessThan":"6.49.21","versionType":"custom","status":"affected"}]}]}],"metrics":{"cvssMetricV40":[{"source":"cvd@cert.pl","type":"Secondary","cvssData":{"version":"4.0","vectorString":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X","baseScore":8.8,"baseSeverity":"HIGH","attackVector":"NETWORK","attackComplexity":"LOW","attackRequirements":"NONE","privilegesRequired":"NONE","userInteraction":"NONE","vulnConfidentialityImpact":"LOW","vulnIntegrityImpact":"NONE","vulnAvailabilityImpact":"HIGH","subConfidentialityImpact":"NONE","subIntegrityImpact":"NONE","subAvailabilityImpact":"NONE","exploitMaturity":"NOT_DEFINED","confidentialityRequirement":"NOT_DEFINED","integrityRequirement":"NOT_DEFINED","availabilityRequirement":"NOT_DEFINED","modifiedAttackVector":"NOT_DEFINED","modifiedAttackComplexity":"NOT_DEFINED","modifiedAttackRequirements":"NOT_DEFINED","modifiedPrivilegesRequired":"NOT_DEFINED","modifiedUserInteraction":"NOT_DEFINED","modifiedVulnConfidentialityImpact":"NOT_DEFINED","modifiedVulnIntegrityImpact":"NOT_DEFINED","modifiedVulnAvailabilityImpact":"NOT_DEFINED","modifiedSubConfidentialityImpact":"NOT_DEFINED","modifiedSubIntegrityImpact":"NOT_DEFINED","modifiedSubAvailabilityImpact":"NOT_DEFINED","Safety":"NOT_DEFINED","Automatable":"NOT_DEFINED","Recovery":"NOT_DEFINED","valueDensity":"NOT_DEFINED","vulnerabilityResponseEffort":"NOT_DEFINED","providerUrgency":"NOT_DEFINED"}}],"cvssMetricV31":[{"source":"nvd@nist.gov","type":"Primary","cvssData":{"version":"3.1","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:H","baseScore":8.2,"baseSeverity":"HIGH","attackVector":"NETWORK","attackComplexity":"LOW","privilegesRequired":"NONE","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"LOW","integrityImpact":"NONE","availabilityImpact":"HIGH"},"exploitabilityScore":3.9,"impactScore":4.2}],"ssvcV203":[{"source":"134c704f-9b21-4f2e-91b3-4a467353bcc0","ssvcData":{"timestamp":"2026-09-08T00:00:00+00:00","id":"CVE-2026-67277","options":[{"exploitation":"active"},{"automatable":"yes"},{"technicalImpact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}]},"cisaExploitAdd":"2026-09-10","cisaActionDue":"2026-09-13","cisaRequiredAction":"Apply mitigations in accordance with vendor instructions, ensuring compliance with CISA’s BOD 26-04 Prioritizing Security Updates Based on Risk (see URL in Notes) guidance and CISA’s “Forensics Triage Requirements” (see URL in Notes). Follow applicable BOD 26-04 guidance for cloud services or discontinue use of the product if mitigations are unavailable. Stakeholders are responsible for evaluating each asset's internet exposure and ensuring adherence to BOD 26-04 patching guidelines.","cisaVulnerabilityName":"MikroTik RouterOS Missing Authentication for Critical Function Vulnerability","weaknesses":[{"source":"cvd@cert.pl","type":"Secondary","description":[{"lang":"en","value":"CWE-306"}]}],"configurations":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:mikrotik:routeros:*:*:*:*:*:*:*:*","versionStartIncluding":"6.0","versionEndExcluding":"6.49.21","matchCriteriaId":"CFC981EC-B44C-40B5-945B-2283FADEC961"},{"vulnerable":true,"criteria":"cpe:2.3:o:mikrotik:routeros:*:*:*:*:*:*:*:*","versionStartIncluding":"7.0","versionEndExcluding":"7.23.4","matchCriteriaId":"881306AB-32B1-4B5F-96D8-9532D25F7AE4"},{"vulnerable":true,"criteria":"cpe:2.3:o:mikrotik:routeros:*:*:*:*:*:*:*:*","versionStartIncluding":"7.24","versionEndExcluding":"7.24.2","matchCriteriaId":"A41D6B3C-D321-4C61-B3D5-00F8276CB4AC"}]}]}],"references":[{"url":"https://cert.pl/en/posts/2026/09/mikrotik-routeros-cve","source":"cvd@cert.pl","tags":["Third Party Advisory"]},{"url":"https://cert.pl/en/posts/2026/09/vulnerabilities-in-mikrotik-routeros-actively-exploited/","source":"cvd@cert.pl","tags":["Mitigation","Third Party Advisory"]},{"url":"https://forum.mikrotik.com/t/6-49-21-long-term-is-released/272802","source":"cvd@cert.pl","tags":["Release Notes"]},{"url":"https://forum.mikrotik.com/t/7-23-4-long-term-is-released/272801","source":"cvd@cert.pl","tags":["Release Notes"]},{"url":"https://forum.mikrotik.com/t/7-24-2-stable-is-released/272800","source":"cvd@cert.pl","tags":["Release Notes"]},{"url":"https://mikrotik.com/supportsec/september-2026-vulnerability/","source":"cvd@cert.pl","tags":["Vendor Advisory"]},{"url":"https://npratley.net/reversing-mikrotiks-silent-patch-the-routeros-7-23-4-fix-they-wouldnt-explain/","source":"cvd@cert.pl","tags":["Exploit","Third Party Advisory"]},{"url":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-67277","source":"134c704f-9b21-4f2e-91b3-4a467353bcc0","tags":["US Government Resource"]}]}}]}