CVE-2025-11933
DoS Vulnerability in wolfSSL TLS 1.3 CKS Extension
Vexday Risk Score
8Low
SSVC decision (CISA)
Track
No exploitation signal → monitor
CVSS 2.3EPSS 0.4%KEV nãoPoC —Nuclei —Metasploit —Patch —
Lifecycle
21 Nov 2025Published on NVD
Recommendation: Monitor — no exploitation signal at the moment.
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.
CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:L
Affected products
wofSSL · wolfSSL