CVE-2025-20134

CWE-4154 documents4 sources
Severity
8.6HIGH
EPSS
0.1%
top 69.20%
CISA KEV
Not in KEV
Exploit
No known exploits
Affected products
2
Cisco Cisco Adaptive Security Appliance (asa) SoftwareCisco Cisco Firepower Threat Defense Software
Timeline
PublishedAug 14

Description

A vulnerability in the certificate processing of Cisco Secure Firewall Adaptive Security Appliance (ASA) Software and Cisco Secure Firewall Threat Defense (FTD) Software could allow an unauthenticated, remote attacker to cause the device to reload unexpectedly, resulting in a denial of service (DoS) condition. This vulnerability is due to improper parsing of SSL/TLS certificates. An attacker could exploit this vulnerability by sending crafted DNS packets that match a static Network Address Tran…

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:HExploitability: 3.9 | Impact: 4.0

Affected Packages2 packages

🔴Vulnerability Details

2
GHSA
GHSA-wmcm-x4v8-vf3r: A vulnerability in the certificate processing of Cisco Secure Firewall Adaptive Security Appliance (ASA) Software and Cisco Secure Firewall Threat Def↗2025-08-14
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CVEList
Cisco Adaptive Security Appliance and Firepower Threat Defense Software SSL/TLS Certificate Denial of Service Vulnerability↗2025-08-14
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📋Vendor Advisories

1
Cisco
Cisco Secure Firewall Adaptive Security Appliance and Secure Firewall Threat Defense Software SSL/TLS Certificate Denial of Service Vulnerability↗2025-08-14
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CVE-2025-20134 (HIGH CVSS 8.6) | A vulnerability in the certificate | cvebase.io