{"schema":"threatline.record/2","record":{"id":"CVE-2026-83540","aliases":[],"summary":"wolfSSHd on Windows race condition leading to logon token reused across connections","details":"When password or public key authentication is used with the Windows port of wolfSSHd, the Windows logon token acquired for one authenticated connection is not released before a token is acquired for a subsequent connection, resulting in user login poisoning between connections. A less privileged user with a valid account on the server can exploit this to force a login as a more privileged user. The vulnerability was introduced with the initial Windows port of wolfSSHd in wolfSSH version 1.4.15 and affects all versions through 1.5.0. Non-Windows builds of wolfSSHd are not affected.","categories":["Unclassified"],"product":"wolfSSH","vendor":"wolfSSL","ecosystem":null,"affected_ranges":[{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-83540","source_modified_at":"2026-10-07T11:29:08.132Z","fetched_at":"2026-10-23T18:48:36.087640Z","product":"wolfSSH","vendor":"wolfSSL","versions":[{"status":"affected","version":"1.4.15","lessThanOrEqual":"1.5.0","changes":[{"at":"1.6.0","status":"unaffected"}],"versionType":"semver"}],"defaultStatus":"unaffected"}],"fixed_versions":[],"cvss":7.7,"severity":"High","kev":{"listed":false},"epss":{"probability":0.00364,"percentile":0.29056,"score_date":"2026-10-23"},"published_at":"2026-10-07T02:40:35.137Z","modified_at":"2026-10-07T11:29:08.132Z","provenance":[{"source":"CVE List","url":"https://www.cve.org/CVERecord?id=CVE-2026-83540","fetched_at":"2026-10-23T18:48:36.087640Z","source_modified_at":"2026-10-07T11:29:08.132Z"},{"source":"EPSS","url":"https://api.first.org/data/v1/epss?cve=CVE-2026-83540","fetched_at":"2026-10-23T18:42:43.628194Z","source_modified_at":"2026-10-23"}],"sources":["CVE List","EPSS"],"references":[{"source":"CVE List","url":"https://github.com/wolfSSL/wolfssh","tags":["product"]},{"source":"CVE List","url":"https://github.com/wolfSSL/wolfssh/commit/b6bd975ccfac6aadf29b98e35e09114bef3840a9","tags":["patch"]},{"source":"CVE List","url":"https://github.com/wolfSSL/wolfssh/commit/9777bc5ce810d6c418a1473e9e8c40cdb0026e5a","tags":["patch"]},{"source":"CVE List","url":"https://www.wolfssl.com/docs/security-vulnerabilities/","tags":["vendor-advisory"]}],"locations":[],"motoko_assessment":{"status":"requires_architecture_review","automatic_remediation":false},"cve_state":"PUBLISHED","cvss_source":"CVE List","ssvc":{"exploitation":"none","automatable":"no","technical_impact":"total","assessed_at":"2026-10-07T11:28:54.655733Z"},"classification":{"method":"product-first software-layer rules","rules_version":"2.1","matched_on":null,"confidence":"unknown","reviewed":false},"change_timestamp":"2026-10-07T11:29:08.132Z","content_hash":"2f9d86abe9297ba51fa0f765ad60aaee59205d15eb3c99978d0ad38f78e30cf0"}}