Variant weakness
Draft
CWE-298: Improper Validation of Certificate Expiration
A certificate expiration is not validated or is incorrectly validated.
Last updated
6
Recorded CVEs
With this primary weakness
0
KEVs
In the CISA KEV catalog
Low
Likelihood of exploit
Per MITRE
Variant
Abstraction
MITRE classification
Overview
CWE-298 (Improper Validation of Certificate Expiration) is a variant-level software weakness catalogued by MITRE in the Common Weakness Enumeration (CWE). It describes a recurring type of mistake that can lead to exploitable security vulnerabilities.
Real-world CVEs
6 recorded CVEs are caused by CWE-298 (Improper Validation of Certificate Expiration). The highest-severity and most recent are shown first. 0 new CWE-298 CVEs have been recorded so far in 2026 (5 in 2025).