CVE-2026-20068

Multiple Cisco Products Snort 3 TBD Denial of Service Vulnerability

At a glance

Severity
MEDIUM 5.8
EPSS
EPSS 0.44 % · percentile 38 (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 error checking when parsing remote procedure call (RPC) data. An attacker could exploit this vulnerability by sending crafted RPC packets through an established connection to be parsed by Snort 3. A successful exploit could allow the attacker to cause a DoS condition when the Snort 3 Detection Engine unexpectedly restarts.

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 Cyber Visionaffected 3.0.0 ; affected 3.0.2 ; affected 3.0.3 ; affected 3.0.1 ; affected 3.1.0 ; affected 3.0.4
Cisco · Cisco Secure Firewall Threat Defense (FTD) Softwareaffected 7.2.4 ; affected 7.2.5 ; affected 7.2.4.1 ; affected 7.4.0 ; affected 7.2.5.1 ; affected 7.4.1
Cisco · Cisco UTD SNORT IPS Engine Softwareaffected 17.3.1a ; affected 17.2.1r ; affected 17.3.2 ; affected 17.4.1a ; affected 17.5.1 ; affected 17.3.3

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