Uncontrolled Resource Consumption Vulnerability in Cisco Open Source Snort 3
CVE-2026-20356

7.5HIGH

Key Information:

Vendor

Cisco
Status
Cisco Cyber Vision
Cisco Open Source Snort3
Cisco Secure Firewall Threat Defense (ftd) Software
Cisco Utd Snort Ips Engine Software
Vendor
CVE Published:
21 October 2026

Badges

👾 Exploit Exists

What is CVE-2026-20356?

The vulnerability within Cisco's Open Source Snort 3 software relates to uncontrolled resource consumption. This issue could allow an attacker to exhaust system resources, leading to a denial of service. Cisco's engineering team has performed a thorough security review and released updates to enhance the software's robustness against these vulnerabilities. Organizations using Snort 3 are encouraged to apply the latest security patches to maintain their defenses.

Affected Version(s)

Cisco Cyber Vision 3.0.0

Cisco Cyber Vision 3.0.2

Cisco Cyber Vision 3.0.3

References

https://sec.cloudapps.cisco.com/security/center/content/C...

CVSS V3.1

Score:
7.5
Severity:
HIGH
Confidentiality:
None
Integrity:
None
Availability:
None
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
None
Scope:
Unchanged

Timeline

  • 👾

    Exploit known to exist

  • Vulnerability published

  • Vulnerability Reserved

.