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CVE-2026-20024

Severity6.8 Medium CVSS 3.1 2 scores
WeaknessBuffer errors (CWE-119)
Published4 Mar 2026
Updated11 Aug 2026

Description

A vulnerability in the OSPF protocol of Cisco Secure Firewall ASA Software and Cisco Secure FTD Software could allow an authenticated, adjacent attacker to cause an affected device to reload unexpectedly, resulting in a DoS condition. To exploit this vulnerability, the attacker must have the OSPF secret key. This vulnerability is due to heap corruption in OSPF when parsing packets. An attacker could exploit this vulnerability by sending crafted packets to the OSPF service. A successful exploit could allow the attacker to corrupt the heap, causing the affected device to reload, resulting in a DoS condition.

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 0.21% 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.

CVSS

6.8 MEDIUM v3.1 CVSS:3.1/AV:A/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H 2 metrics

We show the highest score from the newest CVSS version. Scores from different versions can't be compared, and the first score listed is sometimes a 0.0 placeholder.

VersionScoreBandVectorAssignerType
CVSS 3.1 6.8 MEDIUM CVSS:3.1/AV:A/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H psirt@cisco.com Secondary published
CVSS 3.1 5.7 MEDIUM CVSS:3.1/AV:A/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H NVD Primary

Affected software and releases

Products and versions

2 products, 209 version entries
SourceVendorProductSchemeAffected versions
nvd cisco adaptive security appliance software generic 9.12.1 · 9.12.1.2 · 9.12.1.3 · 9.12.2 · 9.12.2.1 · 9.12.2.4 · 9.12.2.5 · 9.12.2.9 · 9.12.3 · 9.12.3.2 · 9.12.3.7 · 9.12.3.9 · 9.12.3.12 · 9.12.4 · 9.12.4.2 · 9.12.4.4 · 9.12.4.7 · 9.12.4.8 · 9.12.4.10 · 9.12.4.13 · 9.12.4.18 · 9.12.4.24 · 9.12.4.26 · 9.12.4.29 · 9.12.4.30 · 9.12.4.35 · 9.12.4.37 · 9.12.4.38 · 9.12.4.39 · 9.12.4.40 · 9.12.4.41 · 9.12.4.47 · 9.12.4.48 · 9.12.4.50 · 9.12.4.52 · 9.12.4.54 · 9.12.4.55 · 9.12.4.56 · 9.12.4.58 · 9.12.4.62 · 9.12.4.65 · 9.12.4.67 · 9.16.1 · 9.16.1.28 · 9.16.2 · 9.16.2.3 · 9.16.2.7 · 9.16.2.11 · 9.16.2.13 · 9.16.2.14 · 9.16.3 · 9.16.3.3 · 9.16.3.14 · 9.16.3.15 · 9.16.3.19 · 9.16.3.23 · 9.16.4 · 9.16.4.9 · 9.16.4.14 · 9.16.4.19 · 9.16.4.27 · 9.16.4.38 · 9.16.4.39 · 9.16.4.42 · 9.16.4.48 · 9.16.4.55 · 9.16.4.57 · 9.16.4.61 · 9.16.4.62 · 9.16.4.67 · 9.16.4.70 · 9.16.4.71 · 9.16.4.76 · 9.16.4.82 · 9.17.1 · 9.17.1.7 · 9.17.1.9 · 9.17.1.10 · 9.17.1.11 · 9.17.1.13 · 9.17.1.15 · 9.17.1.20 · 9.17.1.30 · 9.17.1.33 · 9.17.1.39 · 9.17.1.45 · 9.17.1.46 · 9.18.1 · 9.18.1.3 · 9.18.2 · 9.18.2.5 · 9.18.2.7 · 9.18.2.8 · 9.18.3 · 9.18.3.39 · 9.18.3.46 · 9.18.3.53 · 9.18.3.55 · 9.18.3.56 · 9.18.4 · 9.18.4.5 · 9.18.4.8 · 9.18.4.22 · 9.18.4.24 · 9.18.4.29 · 9.18.4.34 · 9.18.4.40 · 9.18.4.47 · 9.18.4.50 · 9.18.4.52 · 9.18.4.53 · 9.19.1 · 9.19.1.5 · 9.19.1.9 · 9.19.1.12 · 9.19.1.18 · 9.19.1.22 · 9.19.1.24 · 9.19.1.27 · 9.19.1.28 · 9.19.1.31 · 9.19.1.37 · 9.19.1.38 · 9.20.1 · 9.20.1.5 · 9.20.2 · 9.20.2.10 · 9.20.2.21 · 9.20.2.22 · 9.20.3 · 9.20.3.4 · 9.20.3.7 · 9.20.3.9 · 9.20.3.10 · 9.20.3.13 · 9.20.3.16 · 9.22.1.1 · 9.22.1.2 · 9.22.1.3 · 9.22.1.6 · 9.23.1
nvd cisco secure firewall threat defense generic 6.4.0 · 6.4.0.1 · 6.4.0.2 · 6.4.0.3 · 6.4.0.4 · 6.4.0.5 · 6.4.0.6 · 6.4.0.7 · 6.4.0.8 · 6.4.0.9 · 6.4.0.10 · 6.4.0.11 · 6.4.0.12 · 6.4.0.13 · 6.4.0.14 · 6.4.0.15 · 6.4.0.16 · 6.4.0.17 · 6.4.0.18 · 7.0.0 · 7.0.0.1 · 7.0.1 · 7.0.1.1 · 7.0.2 · 7.0.2.1 · 7.0.3 · 7.0.4 · 7.0.5 · 7.0.6 · 7.0.6.1 · 7.0.6.2 · 7.0.6.3 · 7.0.7 · 7.0.8 · 7.0.8.1 · 7.1.0 · 7.1.0.1 · 7.1.0.2 · 7.1.0.3 · 7.2.0 · 7.2.0.1 · 7.2.1 · 7.2.2 · 7.2.3 · 7.2.4 · 7.2.4.1 · 7.2.5 · 7.2.5.1 · 7.2.5.2 · 7.2.6 · 7.2.7 · 7.2.8 · 7.2.8.1 · 7.2.9 · 7.3.0 · 7.3.1 · 7.3.1.1 · 7.3.1.2 · 7.4.0 · 7.4.1 · 7.4.1.1 · 7.4.2 · 7.4.2.1 · 7.4.2.2 · 7.4.2.3 · 7.4.2.4 · 7.6.0 · 7.7.0

References

URLTags
https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-asaftd-ospf-ZH8PhbSW Vendor Advisory

Timeline

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