Is CVE-2026-20013 actively exploited?

No active exploitation of CVE-2026-20013 has been confirmed so far. Continue monitoring, as exploit status can change.

Can CVE-2026-20013 be exploited remotely?

Yes. CVE-2026-20013 is exploitable remotely over the network (CVSS attack vector: Network).

What is the CVSS score of CVE-2026-20013?

CVE-2026-20013 has a CVSS score of 5.8 (MEDIUM).

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MEDIUM

CVE-2026-20013

CWE-401Published: March 4, 2026· Updated: Mar 5, 2026

5.8

CVSS v3.1

EPSS:0.09%probability of exploitation in 30 daysPercentile:26.1th

Official Description

A vulnerability in the IKEv2 feature of Cisco Secure Firewall ASA Software and Cisco Secure FTD Software could allow an unauthenticated, remote attacker to cause a DoS condition on an affected device that may also impact the availability of services to devices elsewhere in the network.

This vulnerability is due to memory exhaustion caused by not freeing memory during IKEv2 packet processing. An attacker could exploit this vulnerability by sending crafted IKEv2 packets to an affected device. A successful exploit could allow the attacker to exhaust resources, causing a DoS condition that will eventually require the device to manually reload.

NVD Source

Technical Analysis

CVE-2026-20013 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

The vulnerability requires no privileges and no user interaction, making it a prime target for automated exploitation campaigns and worm-like propagation.

The vulnerability has a "Changed" scope, meaning successful exploitation can impact components beyond the vulnerable component itself — such as the host operating system or adjacent services.