{"id":"CVE-2026-67281","state":"PUBLISHED","title":"Unauthenticated file read in Mikrotik RouterOS","description":"RouterOS WebFig contains an unauthenticated file-read vulnerability in the /jsproxy path where a newly allocated session retains a stale uninitialized principal pointer used for file authorization. An unauthenticated attacker can prepare the allocator so that the file-serving path dereferences this pointer with sufficient rights, then supply parent-directory components in an encrypted URI to escape the WebFig file namespace and disclose root-owned files, including configuration stores containing credentials.This issue affects only 7.x branch was fixed in versions: 7.23.4 (Long-term) and 7.24.2 (Stable)","publishedAt":"2026-09-05T20:00:58.457Z","updatedAt":"2026-09-08T15:32:07.407Z","severity":{"score":8.7,"label":"High","version":"4.0","vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N","source":"CERT-PL"},"assigner":"CERT-PL","products":["Mikrotik RouterOS"],"affected":[{"vendor":"Mikrotik","product":"RouterOS","defaultStatus":"unaffected","versions":[{"version":"7.24","status":"affected","lessThan":"7.24.2","versionType":"custom"},{"version":"7.20","status":"affected","lessThan":"7.23.4","versionType":"custom"}]}],"references":["https://cert.pl/en/posts/2026/09/mikrotik-routeros-cve","https://cert.pl/en/posts/2026/09/vulnerabilities-in-mikrotik-routeros-actively-exploited/","https://npratley.net/reversing-mikrotiks-silent-patch-the-routeros-7-23-4-fix-they-wouldnt-explain/","https://mikrotik.com/supportsec/september-2026-vulnerability/","https://forum.mikrotik.com/t/7-23-4-long-term-is-released/272801","https://forum.mikrotik.com/t/7-24-2-stable-is-released/272800"],"weaknesses":["CWE-824","CWE-22"],"ingestedAt":"2026-10-29T20:12:41.951Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/67xxx/CVE-2026-67281.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-67281","state":"PUBLISHED","datePublished":"2026-09-05T20:00:58.457Z","dateUpdated":"2026-09-08T15:32:07.407Z","assignerShortName":"CERT-PL","assignerOrgId":"4bb8329e-dd38-46c1-aafb-9bf32bcb93c6","dateReserved":"2026-07-29T11:59:30.538Z"},"containers":{"cna":{"title":"Unauthenticated file read in Mikrotik RouterOS","descriptions":[{"lang":"en","value":"RouterOS WebFig contains an unauthenticated file-read vulnerability in the /jsproxy path where a newly allocated session retains a stale uninitialized principal pointer used for file authorization. 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