Base weakness
Draft
CWE-324: Use of a Key Past its Expiration Date
The product uses a cryptographic key or password past its expiration date, which diminishes its safety significantly by increasing the timing window for cracking attacks against that key.
Last updated
20
Recorded CVEs
With this primary weakness
0
KEVs
In the CISA KEV catalog
Low
Likelihood of exploit
Per MITRE
Base
Abstraction
MITRE classification
Overview
While the expiration of keys does not necessarily ensure that they are compromised, it is a significant concern that keys which remain in use for prolonged periods of time have a decreasing probability of integrity. For this reason, it is important to replace keys within a period of time proportional to their strength.
Real-world CVEs
20 recorded CVEs are caused by CWE-324 (Use of a Key Past its Expiration Date). The highest-severity and most recent are shown first. 2 new CWE-324 CVEs have been recorded so far in 2026 (5 in 2025).