[ CVE-2026-83540 · Published 7 Oct 2026 ]

Vulnerability in wolfSSL wolfSSH

CVSS 8.8 EPSS <1%Fix available

[ Description ]Official description

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.

[ Fixes ]Fixes and patches