Wolfssl Wolfssh vulnerabilities
5 vulnerabilities
Known vulnerabilities in Wolfssl Wolfssh, newest first, with CVSS severity, EPSS, KEV listings, ransomware use and the affected versions.
RoutineCVE-2026-83540wolfssl · wolfssh +2 morewolfSSHd on Windows race condition leading to logon token reused across connectionsWhen 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.CVSS8.8HighEPSS0.55%RoutineCVE-2026-0930wolfssl · wolfssh +1 morePotential wolfSSHd Buffer out-of-bounds Read on Windows Handling Terminal ResizePotential read out of bounds case with wolfSSHd on Windows while handling a terminal resize request. An authenticated user could trigger the out of bounds read after establishing a connection which would leak the adjacent stack memory to the pseudo-console output.CVSS4.3MediumEPSS0.17%RoutineCVE-2025-15382wolfssl · wolfssh +1 moreClient SCP Request Triggers Buffer Overread by 1 ByteA heap buffer over-read vulnerability exists in the wolfSSH_CleanPath() function in wolfSSH. An authenticated remote attacker can trigger the issue via crafted SCP path input containing '/./' sequences, resulting in a heap over read by 1 byte.CVSS8.1HighEPSS0.35%PrioritiseCVE-2025-14942wolfssl · wolfssh +1 moreAuthentication BypasswolfSSH’s key exchange state machine can be manipulated to leak the client’s password in the clear, trick the client to send a bogus signature, or trick the client into skipping user authentication. This affects client applications with wolfSSH version 1.4.21 and earlier. Users of wolfSSH must update or apply the fix patch and it’s recommended to update credentials used. This fix is also recommended for wolfSSH server applications. While there aren’t any specific attacks on server applications, the same defect is present. Thanks to Aina Toky Rasoamanana of Valeo and Olivier Levillain of Telecom SudParis for the report.CVSS9.8CriticalEPSS0.39%PrioritiseCVE-2025-11625wolfssl · wolfssh +1 moreHost verification bypass and credential leakImproper host authentication vulnerability in wolfSSH version 1.4.20 and earlier clients that allows authentication bypass and leaking of clients credentials.CVSS9.8CriticalEPSS0.43%