CVE-2026-84897: wolfSSH 1.2.0 through 1.5.0; status changes: 1.6.0 — unaffected

Affected technology

wolfSSH · 1.2.0 through 1.5.0; status changes: 1.6.0 — unaffected
wolfSSL Inc.

Description’s affected range: through 1.5.0 admits the server-to-client Diffie-Hellman group exchange messages SSH_MSG_KEX_DH_GEX_GROUP (31) and SSH_MSG_KEX_DH_GEX_REPLY (33) when a server receives them from an unauthenticated client

Component: key exchange
Function: IsMessageAllowedServer, DoKexDhGexGroup, ValidateKexDhGexGroup, falls
File: src/internal.c

Attack conditions (Vendor/CNA, CVSS 4.0): Network (remote) · No privileges required · No user interaction required

What an attacker can do

Vendor/CNA’s CVSS 4.0 assessment (base score 6.9/10) rates confidentiality and integrity impact as none; availability impact as low. The description does not specify what an attacker can achieve beyond these rated impacts.