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CVE record · CVE-2026-20053

Cisco Secure Firewall Threat Defense Software Snort 3 Visual Basic for Application Heap Overflow Denial of Service Vulnerability

CVSS 5.8 MediumEPSS 0.0047 · 40th percentile

Published by the CVE Program (CNA: cisco) at 4 Mar 2026, 17:46 UTC. agentprime has not analysed this yet, so whether it affects any app is not known. This CVE names a vendor and product rather than a package, so the lockfile check doesn’t match it.

Affected products, as the CNA wrote them
VendorProductVersions
Cisco Cisco Cyber Vision
  • affected 3.0.0
  • affected 3.0.2
  • affected 3.0.3
  • affected 3.0.1
  • affected 3.1.0
  • affected 3.0.4
  • affected 3.1.1
  • affected 3.1.2
  • affected 3.2.0
  • affected 3.0.5
  • affected 3.2.1
  • affected 3.0.6
  • and 42 more
Other versions: unknown
Cisco Cisco Secure Firewall Threat Defense (FTD) Software
  • affected 7.2.0
  • affected 7.2.0.1
  • affected 7.2.1
  • affected 7.3.0
  • affected 7.2.2
  • affected 7.2.3
  • affected 7.3.1
  • affected 7.2.4
  • affected 7.2.5
  • affected 7.2.4.1
  • affected 7.3.1.1
  • affected 7.4.0
  • and 25 more
Other versions: unknown
Cisco Cisco UTD SNORT IPS Engine Software
  • affected 17.12.1a
  • affected 17.9.4
  • affected 17.12.2
  • affected 17.13.1a
  • affected 17.12.3
  • affected 17.14.1a
  • affected 17.12.4
  • affected 17.12.3a
  • affected 17.15.1a
  • affected 17.16.1a
  • affected 17.9.5e
  • affected 17.12.4a
  • and 17 more
Other versions: unknown
Identifiers
CVE-2026-20053
CNA
cisco
Weakness (CWE)
CWE-122
Tags
Published
4 Mar 2026
Updated
4 Mar 2026

Not analysed yet

We haven’t published our own analysis of this CVE. If a person reviews it, this page will say what’s affected and what has to be true for it to matter.

Severity and exploitation

ScoreRatingCVSSVectorSource
5.8 Medium 3.1 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:L CNA (cisco)
  • CISA KEV Not listed.
  • EPSS 0.0047, the 40th percentile, on 5 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

Timeline

This record came from the full history of the CVE Program, published 4 Mar 2026. New records show when each source confirmed them.

Sources

References from the CNA

Facts on this page come from the CVE List as the CNA published them, with CVSS from the sources named above, CISA KEV and FIRST EPSS. Vendors, products and versions are shown as the CNA wrote them. We don’t reproduce the CVE’s description.