CVE-2026-20011

Multiple Cisco Products Snort 3 SMTP MIME Denial of Service Vulnerability

En bref

Sévérité
MEDIUM 5.8
EPSS
EPSS 0.53 % · centile 44 (2026-10-27)
État
PUBLISHED
Publiée
Mise à jour
Attribuée par
cisco
Statut NVD
Awaiting Analysis

Description

Multiple Cisco products are affected by a vulnerability in the Snort 3 SMTP MIME Decoder that could allow an unauthenticated, remote attacker to cause the Snort 3 Detection Engine to restart. This vulnerability is due to a lack of error checking when the MIME fields of the SMTP header are parsed. An attacker could exploit this vulnerability by sending crafted SMTP packets through an established connection to be parsed by Snort 3. A successful exploit could allow the attacker to cause a denial of service (DoS) condition when the Snort 3 Detection Engine unexpectedly restarts.

Scores

VersionScoreVecteurÉvalué par
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)

Faiblesses (CWE)

Références européennes

Produits affectés

ProduitVersions
Cisco · Cisco Open Source Snort3affected 3.1.2.0 ; affected 3.1.3.0 ; affected 3.1.4.0 ; affected 3.1.5.0 ; affected 3.1.6.0 ; affected 3.1.7.0
Cisco · Cisco Secure Firewall Threat Defense (FTD) Softwareaffected 7.0.0 ; affected 7.0.0.1 ; affected 7.0.1 ; affected 7.0.1.1 ; affected 7.0.2 ; affected 7.2.0
Cisco · Cisco UTD SNORT IPS Engine Softwareaffected 3.17.1S ; affected 16.12.3 ; affected Fuji-16.9.5 ; affected 16.12.4 ; affected 17.3.1a ; affected 16.6.6

Références

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