CVE-2026-20005

At a glance

Severity
MEDIUM 5.8
EPSS
EPSS 0.52 % · percentile 44 (2026-10-27)
State
PUBLISHED
Published
Updated
Assigner
cisco
NVD status
Analyzed

Description

Multiple Cisco products are affected by a vulnerability in the Snort 3 Detection Engine that could allow an unauthenticated, remote attacker to cause the Snort 3 Detection Engine to restart, resulting in an interruption of packet inspection. This vulnerability is due to incomplete parsing of the SSL handshake ingress packets. An attacker could exploit this vulnerability by sending crafted SSL handshake packets. A successful exploit could allow the attacker to cause a denial of service (DoS) condition when the Snort 3 Detection Engine restarts unexpectedly.

Scores

VersionScoreVectorScored by
CVSS 3.1MEDIUM 5.8CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:Lcisco
CVSS 3.1MEDIUM 5.8CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:LNVD · psirt@cisco.com (Secondary)

Weaknesses (CWE)

European references

Affected configurations (NVD CPE)

Affected products

ProductVersions
Cisco · Cisco Secure Firewall Threat Defense (FTD) Softwareaffected 7.6.0 ; affected 7.6.1 ; affected 7.6.2 ; affected 7.6.2.1 ; affected 7.7.0 ; affected 7.7.10
Cisco · Cisco Cyber Visionaffected 3.0.4 ; affected 3.0.0 ; affected 3.0.1 ; affected 3.0.2 ; affected 3.0.3 ; affected 3.0.5
Cisco · Cisco UTD SNORT IPS Engine Softwareaffected 17.2.1r ; affected 17.3.1a ; affected 17.3.2 ; affected 17.3.3 ; affected 17.3.4a ; affected 17.3.6

References

Sources

SourceLicence
CVE List (CVEProject cvelistV5)CVE Program Terms of Use
EPSS (FIRST.org)FIRST — attribution requested
ENISA EUVDENISA — reproduction authorised, source acknowledged
NVD (NIST) via fkie-cad/nvd-json-data-feedsPublic domain — this product uses data from the NVD API but is not endorsed or certified by the NVD