CVE-2025-20253: Cisco IOS, IOS XE, Secure Firewall Adaptive Security Appliance, and Secure Firewall Threat Defense Software IKEv2 Denial of Service Vulnerability
A vulnerability in the IKEv2 feature of Cisco IOS Software, IOS XE Software, Secure Firewall ASA Software, and Secure FTD Software could allow an unauthenticated, remote attacker to cause the device to reload, resulting in a DoS condition. This vulnerability is due to the improper processing of IKEv2 packets. An attacker could exploit this vulnerability by sending crafted IKEv2 packets to an affected device. A successful exploit could allow the attacker to cause an infinite loop that exhausts resources and could cause the device to reload.
Affected Software
Event History
Frequently Asked Questions
What is the severity of CVE-2025-20253?
The severity of CVE-2025-20253 is considered high due to its potential to cause a denial of service.
How do I fix CVE-2025-20253?
To fix CVE-2025-20253, upgrade to the latest patched version of the affected Cisco software.
Who is affected by CVE-2025-20253?
CVE-2025-20253 affects devices running Cisco IOS Software, IOS XE Software, Secure Firewall ASA Software, and Secure FTD Software.
What type of attack can CVE-2025-20253 lead to?
CVE-2025-20253 can allow an unauthenticated, remote attacker to perform a denial of service attack by causing the device to reload.
Is authentication required to exploit CVE-2025-20253?
No, exploitation of CVE-2025-20253 does not require authentication.