CVE-2025-20239 | Cisco IOS - IKEv2 Operational Intel

Executive Risk Summary

"A vulnerability in the Internet Key Exchange Version 2 (IKEv2) feature of Cisco IOS 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 and can be exploited by sending crafted IKEv2 packets to an affected device."

Operational Audit Arsenal

Target Type Firmware Image

Target Asset IKEv2

Standard Path Global Firmware

Manual Verification Required

This is a non-Windows asset (Cisco). Use the target asset details and official path provided above to verify your current version against the official vendor advisories listed below.

Patch Impact Forecast

Reboot Required Likely

System instability, inability to establish new IKEv2 VPN sessions

Internal Work Notes

CVE-2025-20239: Cisco IOS IKEv2 vulnerability causing DoS condition, requires manual reboot to recover

Technical Intelligence & Operational Utilities • Delivered Weekly

Intelligence Sources

Official Advisoryhttps://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-asa-ftd-ios-dos-DOESHWHy

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Data compiled from NVD, MSRC, and CISA KEV Catalog. Intelligence synthesized via AI. Scripts provided for diagnostic purposes under MIT License.