Secure Firewall ASA and FTD

CVE-2025-20182: Cisco Adaptive Security Appliance Software, Firepower Threat Defense Software and IOS XE Software IKEv2 Denial of Service Vulnerability

A vulnerability in the Internet Key Exchange version 2 (IKEv2) protocol processing of Cisco Adaptive Security Appliance (ASA) Software, Cisco Firepower Threat Defense (FTD) Software, Cisco IOS Software, and Cisco IOS XE Software could allow an unauthenticated, remote attacker to cause a denial of service (DoS) condition on an affected device.

Published

ExploitedNot in CISA KEV
Ransomware useNot reportedPer CISA
SeverityHIGHCVSS 3.1 8.6
EPSS0.56%Chance of exploitation in 30 days
Public exploitNot tracked
FixNot yet

Automatic summary from the vendor's CVE record. We haven't written a full analysis of this vulnerability yet.

Affected and fixed versions

Product / branchFixed in
Cisco Adaptive Security Appliance (ASA) Software 9.12See the advisory
Cisco Adaptive Security Appliance (ASA) Software 9.8See the advisory
Cisco Adaptive Security Appliance (ASA) Software 9.12See the advisory
Cisco Adaptive Security Appliance (ASA) Software 9.8See the advisory
Cisco Adaptive Security Appliance (ASA) Software 9.12See the advisory
Cisco Adaptive Security Appliance (ASA) Software 9.8See the advisory
Cisco Adaptive Security Appliance (ASA) Software 9.8See the advisory
Cisco Adaptive Security Appliance (ASA) Software 9.8See the advisory
Cisco Adaptive Security Appliance (ASA) Software 9.14See the advisory
Cisco Adaptive Security Appliance (ASA) Software 9.12See the advisory
Cisco Adaptive Security Appliance (ASA) Software 9.8See the advisory
Cisco Adaptive Security Appliance (ASA) Software 9.8See the advisory
Cisco Adaptive Security Appliance (ASA) Software 9.8See the advisory
Cisco Adaptive Security Appliance (ASA) Software 9.8See the advisory
Cisco Adaptive Security Appliance (ASA) Software 9.8See the advisory
Cisco Adaptive Security Appliance (ASA) Software 9.8See the advisory
Cisco Adaptive Security Appliance (ASA) Software 9.8See the advisory
Cisco Adaptive Security Appliance (ASA) Software 9.8See the advisory
Cisco Adaptive Security Appliance (ASA) Software 9.8See the advisory
Cisco Adaptive Security Appliance (ASA) Software 9.8See the advisory
Cisco Adaptive Security Appliance (ASA) Software 9.8See the advisory
Cisco Adaptive Security Appliance (ASA) Software 9.8See the advisory
Cisco Adaptive Security Appliance (ASA) Software 9.12See the advisory
Cisco Adaptive Security Appliance (ASA) Software 9.12See the advisory
Cisco Adaptive Security Appliance (ASA) Software 9.8See the advisory
Cisco Adaptive Security Appliance (ASA) Software 9.8See the advisory
Cisco Adaptive Security Appliance (ASA) Software 9.8See the advisory
Cisco Adaptive Security Appliance (ASA) Software 9.8See the advisory
Cisco Adaptive Security Appliance (ASA) Software 9.8See the advisory
Cisco Adaptive Security Appliance (ASA) Software 9.8See the advisory
Cisco Adaptive Security Appliance (ASA) Software 9.14See the advisory
Cisco Adaptive Security Appliance (ASA) Software 9.12See the advisory
Cisco Adaptive Security Appliance (ASA) Software 9.8See the advisory
Cisco Adaptive Security Appliance (ASA) Software 9.12See the advisory
Cisco Adaptive Security Appliance (ASA) Software 9.8See the advisory
Cisco Adaptive Security Appliance (ASA) Software 9.8See the advisory
Cisco Adaptive Security Appliance (ASA) Software 9.8See the advisory
Cisco Adaptive Security Appliance (ASA) Software 9.8See the advisory
Cisco Adaptive Security Appliance (ASA) Software 9.8See the advisory
Cisco Adaptive Security Appliance (ASA) Software 9.12See the advisory
Cisco Adaptive Security Appliance (ASA) Software 9.8See the advisory
Cisco Adaptive Security Appliance (ASA) Software 9.12See the advisory
Cisco Adaptive Security Appliance (ASA) Software 9.8See the advisory
Cisco Adaptive Security Appliance (ASA) Software 9.12See the advisory
Cisco Adaptive Security Appliance (ASA) Software 9.8See the advisory
Cisco Adaptive Security Appliance (ASA) Software 9.8See the advisory
Cisco Adaptive Security Appliance (ASA) Software 9.12See the advisory
Cisco Adaptive Security Appliance (ASA) Software 9.12See the advisory
Cisco Adaptive Security Appliance (ASA) Software 9.8See the advisory
Cisco Adaptive Security Appliance (ASA) Software 9.8See the advisory
Cisco Adaptive Security Appliance (ASA) Software 9.12See the advisory
Cisco Adaptive Security Appliance (ASA) Software 9.12See the advisory
Cisco Adaptive Security Appliance (ASA) Software 9.14See the advisory
Cisco Adaptive Security Appliance (ASA) Software 9.8See the advisory
Cisco Adaptive Security Appliance (ASA) Software 9.14See the advisory
Cisco Adaptive Security Appliance (ASA) Software 9.14See the advisory
Cisco Adaptive Security Appliance (ASA) Software 9.8See the advisory
Cisco Adaptive Security Appliance (ASA) Software 9.12See the advisory
Cisco Adaptive Security Appliance (ASA) Software 9.14See the advisory
Cisco Adaptive Security Appliance (ASA) Software 9.8See the advisory
Cisco Adaptive Security Appliance (ASA) Software 9.12See the advisory
Cisco Adaptive Security Appliance (ASA) Software 9.14See the advisory
Cisco Adaptive Security Appliance (ASA) Software 9.12See the advisory
Cisco Adaptive Security Appliance (ASA) Software 9.8See the advisory
Cisco Adaptive Security Appliance (ASA) Software 9.12See the advisory
Cisco Adaptive Security Appliance (ASA) Software 9.14See the advisory
Cisco Adaptive Security Appliance (ASA) Software 9.14See the advisory
Cisco Adaptive Security Appliance (ASA) Software 9.12See the advisory
Cisco Adaptive Security Appliance (ASA) Software 9.8See the advisory
Cisco Adaptive Security Appliance (ASA) Software 9.14See the advisory
Cisco Adaptive Security Appliance (ASA) Software 9.8See the advisory
Cisco Adaptive Security Appliance (ASA) Software 9.12See the advisory
Cisco Adaptive Security Appliance (ASA) Software 9.8See the advisory
Cisco Adaptive Security Appliance (ASA) Software 9.14See the advisory
Cisco Adaptive Security Appliance (ASA) Software 9.12See the advisory
Cisco Adaptive Security Appliance (ASA) Software 9.16See the advisory
Cisco Adaptive Security Appliance (ASA) Software 9.8See the advisory
Cisco Adaptive Security Appliance (ASA) Software 9.14See the advisory
Cisco Adaptive Security Appliance (ASA) Software 9.12See the advisory
Cisco Adaptive Security Appliance (ASA) Software 9.16See the advisory
Cisco Adaptive Security Appliance (ASA) Software 9.14See the advisory
Cisco Adaptive Security Appliance (ASA) Software 9.12See the advisory
Cisco Adaptive Security Appliance (ASA) Software 9.14See the advisory
Cisco Adaptive Security Appliance (ASA) Software 9.16See the advisory
Cisco Adaptive Security Appliance (ASA) Software 9.12See the advisory
Cisco Adaptive Security Appliance (ASA) Software 9.16See the advisory
Cisco Adaptive Security Appliance (ASA) Software 9.8See the advisory
Cisco Adaptive Security Appliance (ASA) Software 9.14See the advisory
Cisco Adaptive Security Appliance (ASA) Software 9.12See the advisory
Cisco Adaptive Security Appliance (ASA) Software 9.8See the advisory
Cisco Adaptive Security Appliance (ASA) Software 9.15See the advisory
Cisco Adaptive Security Appliance (ASA) Software 9.14See the advisory
Cisco Adaptive Security Appliance (ASA) Software 9.16See the advisory
Cisco Adaptive Security Appliance (ASA) Software 9.12See the advisory
Cisco Adaptive Security Appliance (ASA) Software 9.14See the advisory
Cisco Adaptive Security Appliance (ASA) Software 9.17See the advisory
Cisco Adaptive Security Appliance (ASA) Software 9.16See the advisory
Cisco Adaptive Security Appliance (ASA) Software 9.14See the advisory
Cisco Adaptive Security Appliance (ASA) Software 9.16See the advisory
Cisco Adaptive Security Appliance (ASA) Software 9.12See the advisory
Cisco Adaptive Security Appliance (ASA) Software 9.12See the advisory
Cisco Adaptive Security Appliance (ASA) Software 9.8See the advisory
Cisco Adaptive Security Appliance (ASA) Software 9.14See the advisory
Cisco Adaptive Security Appliance (ASA) Software 9.16See the advisory
Cisco Adaptive Security Appliance (ASA) Software 9.17See the advisory
Cisco Adaptive Security Appliance (ASA) Software 9.12See the advisory
Cisco Adaptive Security Appliance (ASA) Software 9.16See the advisory
Cisco Adaptive Security Appliance (ASA) Software 9.14See the advisory
Cisco Adaptive Security Appliance (ASA) Software 9.16See the advisory
Cisco Adaptive Security Appliance (ASA) Software 9.16See the advisory
Cisco Adaptive Security Appliance (ASA) Software 9.17See the advisory
Cisco Adaptive Security Appliance (ASA) Software 9.14See the advisory
Cisco Adaptive Security Appliance (ASA) Software 9.12See the advisory
Cisco Adaptive Security Appliance (ASA) Software 9.17See the advisory
Cisco Adaptive Security Appliance (ASA) Software 9.8See the advisory
Cisco Adaptive Security Appliance (ASA) Software 9.18See the advisory
Cisco Adaptive Security Appliance (ASA) Software 9.12See the advisory
Cisco Adaptive Security Appliance (ASA) Software 9.14See the advisory
Cisco Adaptive Security Appliance (ASA) Software 9.16See the advisory
Cisco Adaptive Security Appliance (ASA) Software 9.18See the advisory
Cisco Adaptive Security Appliance (ASA) Software 9.17See the advisory
Cisco Adaptive Security Appliance (ASA) Software 9.12See the advisory
Cisco Adaptive Security Appliance (ASA) Software 9.14See the advisory
Cisco Adaptive Security Appliance (ASA) Software 9.18See the advisory
Cisco Adaptive Security Appliance (ASA) Software 9.16See the advisory
Cisco Adaptive Security Appliance (ASA) Software 9.17See the advisory
Cisco Adaptive Security Appliance (ASA) Software 9.12See the advisory
Cisco Adaptive Security Appliance (ASA) Software 9.14See the advisory
Cisco Adaptive Security Appliance (ASA) Software 9.17See the advisory
Cisco Adaptive Security Appliance (ASA) Software 9.8See the advisory
Cisco Adaptive Security Appliance (ASA) Software 9.12See the advisory
Cisco Adaptive Security Appliance (ASA) Software 9.14See the advisory
Cisco Adaptive Security Appliance (ASA) Software 9.16See the advisory
Cisco Adaptive Security Appliance (ASA) Software 9.18See the advisory
Cisco Adaptive Security Appliance (ASA) Software 9.16See the advisory
Cisco Adaptive Security Appliance (ASA) Software 9.12See the advisory
Cisco Adaptive Security Appliance (ASA) Software 9.14See the advisory
Cisco Adaptive Security Appliance (ASA) Software 9.8See the advisory
Cisco Adaptive Security Appliance (ASA) Software 9.17See the advisory
Cisco Adaptive Security Appliance (ASA) Software 9.18See the advisory
Cisco Adaptive Security Appliance (ASA) Software 9.19See the advisory
Cisco Adaptive Security Appliance (ASA) Software 9.16See the advisory
Cisco Adaptive Security Appliance (ASA) Software 9.12See the advisory
Cisco Adaptive Security Appliance (ASA) Software 9.18See the advisory
Cisco Adaptive Security Appliance (ASA) Software 9.14See the advisory
Cisco Adaptive Security Appliance (ASA) Software 9.16See the advisory
Cisco Adaptive Security Appliance (ASA) Software 9.8See the advisory
Cisco Adaptive Security Appliance (ASA) Software 9.18See the advisory
Cisco Adaptive Security Appliance (ASA) Software 9.19See the advisory
Cisco Adaptive Security Appliance (ASA) Software 9.14See the advisory
Cisco Adaptive Security Appliance (ASA) Software 9.12See the advisory
Cisco Adaptive Security Appliance (ASA) Software 9.16See the advisory
Cisco Adaptive Security Appliance (ASA) Software 9.17See the advisory
Cisco Adaptive Security Appliance (ASA) Software 9.19See the advisory
Cisco Adaptive Security Appliance (ASA) Software 9.18See the advisory
Cisco Adaptive Security Appliance (ASA) Software 9.16See the advisory
Cisco Adaptive Security Appliance (ASA) Software 9.12See the advisory
Cisco Adaptive Security Appliance (ASA) Software 9.19See the advisory
Cisco Adaptive Security Appliance (ASA) Software 9.18See the advisory
Cisco Adaptive Security Appliance (ASA) Software 9.16See the advisory
Cisco Adaptive Security Appliance (ASA) Software 9.19See the advisory
Cisco Adaptive Security Appliance (ASA) Software 9.18See the advisory
Cisco Adaptive Security Appliance (ASA) Software 9.18See the advisory
Cisco Adaptive Security Appliance (ASA) Software 9.16See the advisory
Cisco Adaptive Security Appliance (ASA) Software 9.17See the advisory
Cisco Adaptive Security Appliance (ASA) Software 9.12See the advisory
Cisco Adaptive Security Appliance (ASA) Software 9.16See the advisory
Cisco Adaptive Security Appliance (ASA) Software 9.18See the advisory
Cisco Adaptive Security Appliance (ASA) Software 9.20See the advisory
Cisco Adaptive Security Appliance (ASA) Software 9.16See the advisory
Cisco Adaptive Security Appliance (ASA) Software 9.19See the advisory
Cisco Adaptive Security Appliance (ASA) Software 9.18See the advisory
Cisco Adaptive Security Appliance (ASA) Software 9.20See the advisory
Cisco Adaptive Security Appliance (ASA) Software 9.18See the advisory
Cisco Adaptive Security Appliance (ASA) Software 9.19See the advisory
Cisco Adaptive Security Appliance (ASA) Software 9.16See the advisory
Cisco Adaptive Security Appliance (ASA) Software 9.18See the advisory
Cisco Adaptive Security Appliance (ASA) Software 9.20See the advisory
Cisco Adaptive Security Appliance (ASA) Software 9.19See the advisory
Cisco Adaptive Security Appliance (ASA) Software 9.12See the advisory
Cisco Adaptive Security Appliance (ASA) Software 9.16See the advisory
Cisco Adaptive Security Appliance (ASA) Software 9.18See the advisory
Cisco Adaptive Security Appliance (ASA) Software 9.20See the advisory
Cisco Adaptive Security Appliance (ASA) Software 9.16See the advisory
Cisco Adaptive Security Appliance (ASA) Software 9.19See the advisory
Cisco Adaptive Security Appliance (ASA) Software 9.17See the advisory
Cisco Adaptive Security Appliance (ASA) Software 9.12See the advisory
Cisco Adaptive Security Appliance (ASA) Software 9.14See the advisory
Cisco Adaptive Security Appliance (ASA) Software 9.18See the advisory
Cisco Adaptive Security Appliance (ASA) Software 9.20See the advisory
Cisco Adaptive Security Appliance (ASA) Software 9.16See the advisory
Cisco Adaptive Security Appliance (ASA) Software 9.19See the advisory
Cisco Adaptive Security Appliance (ASA) Software 9.18See the advisory
Cisco Firepower Threat Defense Software 6.2See the advisory
Cisco Firepower Threat Defense Software 6.4See the advisory
Cisco Firepower Threat Defense Software 6.2See the advisory
Cisco Firepower Threat Defense Software 6.2See the advisory
Cisco Firepower Threat Defense Software 6.4See the advisory
Cisco Firepower Threat Defense Software 6.2See the advisory
Cisco Firepower Threat Defense Software 6.2See the advisory
Cisco Firepower Threat Defense Software 6.2See the advisory
Cisco Firepower Threat Defense Software 6.4See the advisory
Cisco Firepower Threat Defense Software 6.2See the advisory
Cisco Firepower Threat Defense Software 6.4See the advisory
Cisco Firepower Threat Defense Software 6.4See the advisory
Cisco Firepower Threat Defense Software 6.2See the advisory
Cisco Firepower Threat Defense Software 6.4See the advisory
Cisco Firepower Threat Defense Software 6.2See the advisory
Cisco Firepower Threat Defense Software 6.2See the advisory
Cisco Firepower Threat Defense Software 6.2See the advisory
Cisco Firepower Threat Defense Software 6.2See the advisory
Cisco Firepower Threat Defense Software 6.2See the advisory
Cisco Firepower Threat Defense Software 6.4See the advisory
Cisco Firepower Threat Defense Software 6.2See the advisory
Cisco Firepower Threat Defense Software 6.2See the advisory
Cisco Firepower Threat Defense Software 6.2See the advisory
Cisco Firepower Threat Defense Software 6.4See the advisory
Cisco Firepower Threat Defense Software 6.4See the advisory
Cisco Firepower Threat Defense Software 6.6See the advisory
Cisco Firepower Threat Defense Software 6.4See the advisory
Cisco Firepower Threat Defense Software 6.2See the advisory
Cisco Firepower Threat Defense Software 6.6See the advisory
Cisco Firepower Threat Defense Software 6.6See the advisory
Cisco Firepower Threat Defense Software 6.4See the advisory
Cisco Firepower Threat Defense Software 6.4See the advisory
Cisco Firepower Threat Defense Software 6.6See the advisory
Cisco Firepower Threat Defense Software 6.6See the advisory
Cisco Firepower Threat Defense Software 6.4See the advisory
Cisco Firepower Threat Defense Software 7.0See the advisory
Cisco Firepower Threat Defense Software 6.2See the advisory
Cisco Firepower Threat Defense Software 7.0See the advisory
Cisco Firepower Threat Defense Software 6.6See the advisory
Cisco Firepower Threat Defense Software 7.0See the advisory
Cisco Firepower Threat Defense Software 7.1See the advisory
Cisco Firepower Threat Defense Software 6.4See the advisory
Cisco Firepower Threat Defense Software 6.6See the advisory
Cisco Firepower Threat Defense Software 6.2See the advisory
Cisco Firepower Threat Defense Software 7.0See the advisory
Cisco Firepower Threat Defense Software 6.4See the advisory
Cisco Firepower Threat Defense Software 7.1See the advisory
Cisco Firepower Threat Defense Software 6.6See the advisory
Cisco Firepower Threat Defense Software 7.0See the advisory
Cisco Firepower Threat Defense Software 6.4See the advisory
Cisco Firepower Threat Defense Software 7.2See the advisory
Cisco Firepower Threat Defense Software 7.0See the advisory
Cisco Firepower Threat Defense Software 7.0See the advisory
Cisco Firepower Threat Defense Software 6.6See the advisory
Cisco Firepower Threat Defense Software 7.1See the advisory
Cisco Firepower Threat Defense Software 7.2See the advisory
Cisco Firepower Threat Defense Software 7.0See the advisory
Cisco Firepower Threat Defense Software 7.2See the advisory
Cisco Firepower Threat Defense Software 7.0See the advisory
Cisco Firepower Threat Defense Software 6.4See the advisory
Cisco Firepower Threat Defense Software 7.3See the advisory
Cisco Firepower Threat Defense Software 7.2See the advisory
Cisco Firepower Threat Defense Software 7.2See the advisory
Cisco Firepower Threat Defense Software 6.6See the advisory
Cisco Firepower Threat Defense Software 7.3See the advisory
Cisco Firepower Threat Defense Software 7.1See the advisory
Cisco Firepower Threat Defense Software 7.2See the advisory
Cisco Firepower Threat Defense Software 7.0See the advisory
Cisco Firepower Threat Defense Software 7.2See the advisory
Cisco Firepower Threat Defense Software 7.2See the advisory
Cisco Firepower Threat Defense Software 7.3See the advisory
Cisco Firepower Threat Defense Software 7.4See the advisory
Cisco Firepower Threat Defense Software 6.4See the advisory
Cisco Firepower Threat Defense Software 7.0See the advisory
Cisco Firepower Threat Defense Software 7.2See the advisory
Cisco Firepower Threat Defense Software 7.4See the advisory
Cisco Firepower Threat Defense Software 7.2See the advisory
Cisco Firepower Threat Defense Software 7.0See the advisory
Cisco Firepower Threat Defense Software 7.4See the advisory
Cisco Firepower Threat Defense Software 6.6See the advisory
Cisco Firepower Threat Defense Software 6.4See the advisory
Cisco Firepower Threat Defense Software 7.2See the advisory
Cisco Firepower Threat Defense Software 7.2See the advisory
Cisco Firepower Threat Defense Software 7.3See the advisory
Cisco Firepower Threat Defense Software 7.2See the advisory
Cisco Firepower Threat Defense Software 7.2See the advisory

Always confirm against the vendor advisory, which lists every fixed hotfix.

What it is

A vulnerability in the Internet Key Exchange version 2 (IKEv2) protocol processing of Cisco Adaptive Security Appliance (ASA) Software, Cisco Firepower Threat Defense (FTD) Software, Cisco IOS Software, and Cisco IOS XE Software could allow an unauthenticated, remote attacker to cause a denial of service (DoS) condition on an affected device.

This vulnerability is due to insufficient input validation when processing IKEv2 messages. An attacker could exploit this vulnerability by sending crafted IKEv2 traffic to an affected device. A successful exploit could allow the attacker to cause the device to reload, resulting in a DoS condition on the affected device.

Exploitation

The Cisco Product Security Incident Response Team (PSIRT) is not aware of any public announcements or malicious use of the vulnerability that is described in this advisory.

Sources

KEV status, EPSS score and vendor data refreshed automatically, last on 11 Oct 2026.

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