CVE-2025-11933CWE-20

CVE-2025-11933

Medium · published November 22, 2025

CVSS v3.1
6.5
EPSS
0%
Percentile
38.2
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v3.1
6.5 · MEDIUM
Vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
CVSS v4.0
Not supplied
EPSS
0.00451 · 38.2th percentile
Weakness
CWE-20 · Improper Input Validation
Published
2025-11-22T04:15Z
Affected products (1)
ProductVersionsFixed in
wolfssl/wolfssl≥ 5.8.2, < 5.8.45.8.4
References (2)
https://github.com/wolfSSL/wolfssl · [email protected]https://github.com/wolfSSL/wolfssl/pull/9132 · [email protected]
EPSS history
Timeline
  • 21 NOV 22:19Z
    DoS Vulnerability in wolfSSL TLS 1.3 CKS Extension
    cvelistv5