{"id":"CVE-2026-83540","aliases":[],"url":"https://o3.security/vulnerability/CVE-2026-83540","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.","published":"2026-10-07T02:40:35.137Z","modified":"2026-10-13T02:47:14.611394160Z","cvss":null,"epss":null,"cisaKev":null,"exploitsKnown":null,"affectedPackages":[],"fix":{"url":"https://github.com/wolfSSL/wolfssh/commit/9777bc5ce810d6c418a1473e9e8c40cdb0026e5a","label":"wolfSSL/wolfssh@9777bc5"},"references":[{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/83xxx/CVE-2026-83540.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-83540"},{"type":"ADVISORY","url":"https://www.wolfssl.com/docs/security-vulnerabilities/"},{"type":"FIX","url":"https://github.com/wolfSSL/wolfssh/commit/9777bc5ce810d6c418a1473e9e8c40cdb0026e5a"},{"type":"FIX","url":"https://github.com/wolfSSL/wolfssh/commit/b6bd975ccfac6aadf29b98e35e09114bef3840a9"},{"type":"PACKAGE","url":"https://github.com/wolfSSL/wolfssh"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-10-13T02:47:14.611394160Z"}}