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CVE-2026-20068

Multiple Cisco Products Snort 3 TBD Denial of Service Vulnerability

Published: Mar 4, 2026Updated: Mar 5, 2026 Sources: CVE List NVDCWE-248
NVD MITRE
5.8CVSSMEDIUM
EPSS Score
0.4%
Top 65.6%
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 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.

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-248

Affected Products

Cisco Cyber VisionCiscoNetworking Infrastructure
Cisco Secure Firewall Threat Defense (FTD) SoftwareCiscoNetworking 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 5, 2026

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