CVE-2025-11933

MEDIUM

Wolfssl < 5.8.4 - Improper Input Validation

Title source: rule

Description

Improper Input Validation in the TLS 1.3 CKS extension parsing in wolfSSL 5.8.2 and earlier on multiple platforms allows a remote unauthenticated attacker to potentially cause a denial-of-service via a crafted ClientHello message with duplicate CKS extensions.

References (2)

[Product] https://github.com/wolfSSL/wolfssl

[Issue Tracking, Patch] https://github.com/wolfSSL/wolfssl/pull/9132

Scores

CVSS v3 6.5

EPSS 0.0005

EPSS Percentile 16.3%

Attack Vector NETWORK

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Details

CWE

CWE-20

Status published

Products (1)

wolfssl/wolfssl 5.8.2 - 5.8.4

Published Nov 21, 2025

Tracked Since Feb 18, 2026