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CVE-2026-20005

Published: Mar 4, 2026Updated: Mar 4, 2026 Sources: CVE List NVDCWE-392
NVD MITRE
5.8CVSSMEDIUM
EPSS Score
0.5%
Top 61.8%
CISA KEV
Not in KEV
Exploits
0 Known
Remediation
No Fix Available

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.

CVSS Vector Breakdown

AV:NAC:LPR:NUI:NS:CC:NI:NA:L
Exploitability
AV:NAttack Vector
Network
AC:LAttack Complexity
Low
PR:NPrivileges Required
None
UI:NUser Interaction
None
Scope
S:CScope
Changed
Impact
C:NConfidentiality
None
I:NIntegrity
None
A:LAvailability
Low
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Weaknesses

CWE-392

Affected Products

Cisco Secure Firewall Threat Defense (FTD) SoftwareCiscoNetworking Infrastructure
Cisco Cyber VisionCiscoNetworking Infrastructure
Cisco UTD SNORT IPS Engine SoftwareCiscoNetworking Infrastructure
ciscocommercialUSNetworking Infrastructureaka cisco systems, cisco systems inc.

Exploitability

0 exploit sources identified

Exploit details including PoC links, Metasploit modules, and scanner templates are available after registration.

View exploit details

References

https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-snort3-multi-dos-XFWkWSwz
sec.cloudapps.cisco.com

Timeline

Published
Mar 4, 2026
Last Updated
Mar 4, 2026

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