Vulnerability in Cisco Adaptive_security_appliance_software

CVE-2025-20127

A vulnerability in the TLS 1.3 implementation for a specific cipher for Cisco Secure Firewall Adaptive Security Appliance (ASA) Software and Cisco Secure Firewall Threat Defense (FTD) Software for Cisco Firepower 3100 and 4200 Series devic…

EPSS: 0.006 (43.2th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 7.7 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H.

Affected products

Weakness classification (CWE)

References

Frequently asked questions

What is CVE-2025-20127?
CVE-2025-20127 is a high-severity vulnerability in Cisco Adaptive_security_appliance_software, classified under Improper Resource Shutdown or Release. CVSS score: 7.7/10. Published 2025-08-14.
How severe is CVE-2025-20127?
High severity. CVSS v3 base score is 7.7 out of 10.