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CVE-2026-20013

Affected software2 products, listed below
Severity5.8 Medium CVSS 3.1
WeaknessCWE-401
Published4 Mar 2026
Updated11 Aug 2026

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.

Exploitation status

No public exploit

No exploit has been reported in the sources we check.

  • CISA KEV not listed
  • VulnCheck KEV not listed
  • CISA Vulnrichment exploitation: none
  • Indexed PoC none indexed
  • EPSS 0.35% chance in 30 days

Waratek protection

Outside Waratek scope

A Java vulnerability, but not one Waratek protects. It affects only Java on a user's desktop (applets, Web Start, JavaFX, the installer), sits in a product the Waratek agent can't be installed into, or is in a package we don't expect in business applications. The decision below says which.

  • Protection none
  • Action not pursued none
  • Review automated Upstream data
  • Record active
Decided by The only affected product being a sealed appliance image, where Java runs but no -javaagent can be attached
Finding This CVE names only products the Waratek agent cannot be installed into (cisco/secure_firewall_threat_defense). They ship as sealed appliance images or as native code with no application JVM, so there is no start-up line to add -javaagent to. The vulnerability may well be a Java one; it is permanently out of ARMR's reach rather than outside its subject.

Affected software and releases

Products and versions

2 products, 8 version entries
SourceVendorProductSchemeAffected versions
nvd cisco adaptive security appliance software generic ≥ 9.18.1 and < 9.18.4.66 · ≥ 9.19.1 and < 9.20.3.20 · ≥ 9.22.1.1 and < 9.22.2.4 · ≥ 9.23.1 and < 9.23.1.3
nvd cisco secure firewall threat defense generic ≥ 7.2.0 and < 7.2.11 · ≥ 7.3.0 and < 7.4.3 · ≥ 7.6.0 and < 7.6.4 · ≥ 7.7.0 and < 7.7.10

References

URLTags
https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-asaftd-ikev2-dos-eBueGdEG Vendor Advisory

Timeline

Published2026-03-04By the CVE Program.
NVD record modified2026-08-11NVD's own last-modified date for this record.