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
- Cisco Adaptive_security_appliance_software — versions 9.20.1, 9.20.1.5, 9.20.2
- Cisco Adaptive Security Appliance (Asa) Software — versions 9.20.1, 9.20.1.5, 9.20.2
- Cisco Firepower Threat Defense Software — versions 7.4.0, 7.4.1, 7.4.1.1
- Cisco Firepower_threat_defense — versions 7.4.0, 7.4.1, 7.4.1.1
- Cisco Secure_firewall_3105
- Cisco Secure_firewall_3110
- Cisco Secure_firewall_3120
- Cisco Secure_firewall_3130
- Cisco Secure_firewall_3140
- Cisco Secure_firewall_4215
Weakness classification (CWE)
References
- psirt@cisco.com (Vendor Advisory)
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.