Vulnerability · Published Aug 14, 2025 · Assigned by cisco
CVE-2025-20225
Medium 5.8
In plain English
A medium-severity memory leak in Cisco Adaptive Security Appliance (ASA) Software from Cisco. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.7% (higher than 55% of all known vulnerabilities).
Official description
A vulnerability in the Internet Key Exchange Version 2 (IKEv2) feature of Cisco IOS Software, IOS XE Software, Secure Firewall Adaptive Security Appliance (ASA) Software, and Secure Firewall Threat Defense (FTD) Software could allow an unauthenticated, remote attacker to trigger a memory leak, resulting in a denial of service (DoS) condition. This vulnerability is due to a lack of proper processing of IKEv2 packets. An attacker could exploit this vulnerability by sending crafted IKEv2 packets to an affected device. In the case of Cisco IOS and IOS XE Software, a successful exploit could allow the attacker to cause the device to reload unexpectedly. In the case of Cisco ASA and FTD Software, a successful exploit could allow the attacker to partially exhaust system memory, causing system instability such as being unable to establish new IKEv2 VPN sessions. A manual reboot of the device is required to recover from this condition.
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| Cisco | IOS | 15.1(2)T15.1(1)T415.1(3)T215.1(1)T115.1(2)T0a15.1(3)T315.1(1)T315.1(2)T3 |
| Cisco | Cisco Adaptive Security Appliance (ASA) Software | 9.8.19.8.1.59.8.1.79.8.29.8.2.89.8.2.149.8.2.159.8.2.17 |
| Cisco | Cisco IOS XE Software | 3.3.0SG3.3.2SG3.3.1SG3.4.0SG3.4.2SG3.4.1SG3.4.3SG3.4.4SG |
| Cisco | Cisco Firepower Threat Defense Software | 6.2.36.2.3.16.2.3.26.2.3.36.2.3.46.2.3.56.2.3.66.2.3.7 |
Weakness: CWE-401 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:L