CVE-2026-20291 is a vulnerability in Cisco Cyber Vision
Published on October 21, 2026
Multiple Cisco Products Snort 3 Software Hardening Release: October 2026
As part of Cisco's ongoing commitment to proactive security and product quality, the Cisco owned Open Source Snort 3 Software engineering team has conducted a comprehensive internal security review. This review resulted in software hardening releases that address multiple internally discovered vulnerabilities.
The vulnerabilities tracked by CVE-2026-20291 are related to issues concerning improper privilege management that are grouped under the Common Weakness Enumeration (CWE) Base CWE-269.
Vulnerability Analysis
CVE-2026-20291 can be exploited with local system access, and requires small amount of user privileges. This vulnerability is considered to have a low attack complexity. The potential impact of an exploit of this vulnerability is considered to be very high.
Attack Vector:
LOCAL
Attack Complexity:
LOW
Privileges Required:
LOW
User Interaction:
NONE
Scope:
UNCHANGED
Confidentiality Impact:
HIGH
Integrity Impact:
HIGH
Availability Impact:
HIGH
Weakness Type
Improper Privilege Management
The software does not properly assign, modify, track, or check privileges for an actor, creating an unintended sphere of control for that actor.
Products Associated with CVE-2026-20291
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Affected Versions
Cisco Cyber Vision:- Version 3.0.0 is affected.
- Version 3.0.2 is affected.
- Version 3.0.3 is affected.
- Version 3.0.1 is affected.
- Version 3.1.0 is affected.
- Version 3.0.4 is affected.
- Version 3.1.1 is affected.
- Version 3.1.2 is affected.
- Version 3.2.0 is affected.
- Version 3.0.5 is affected.
- Version 3.2.1 is affected.
- Version 3.0.6 is affected.
- Version 3.2.2 is affected.
- Version 3.2.3 is affected.
- Version 3.2.4 is affected.
- Version 4.0.0 is affected.
- Version 4.0.1 is affected.
- Version 4.0.2 is affected.
- Version 4.0.3 is affected.
- Version 4.1.0 is affected.
- Version 4.1.1 is affected.
- Version 4.1.2 is affected.
- Version 4.1.3 is affected.
- Version 4.1.4 is affected.
- Version 4.2.0 is affected.
- Version 4.2.1 is affected.
- Version 4.1.5 is affected.
- Version 4.2.2 is affected.
- Version 4.2.X is affected.
- Version 4.2.3 is affected.
- Version 4.2.4 is affected.
- Version 4.2.6 is affected.
- Version 4.1.6 is affected.
- Version 4.3.0 is affected.
- Version 4.3.1 is affected.
- Version 4.3.2 is affected.
- Version 4.3.3 is affected.
- Version 4.4.0 is affected.
- Version 4.4.1 is affected.
- Version 4.4.2 is affected.
- Version 4.4.3 is affected.
- Version 4.1.7 is affected.
- Version 5.0.0 is affected.
- Version 5.0.1 is affected.
- Version 5.0.2 is affected.
- Version 5.1.0 is affected.
- Version 5.1.1 is affected.
- Version 5.1.2 is affected.
- Version 5.1.3 is affected.
- Version 5.2.0 is affected.
- Version 5.2.1 is affected.
- Version 5.3.0 is affected.
- Version 5.3.1 is affected.
- Version 5.3.2 is affected.
- Version 5.3.3 is affected.
- Version 5.5.1 is affected.
- Version 5.6.1 is affected.
- Version 5.4.0 is affected.
- Version 5.4.1 is affected.
- Version 5.4.2 is affected.
- Version 5.7.0 is affected.
- Version 5.8.1 is affected.
- Version 5.7.1 is affected.
- Version 5.8.0 is affected.
- Version 5.5.2 is affected.
- Version 3.12.2.0 is affected.
- Version 3.1.2.0 is affected.
- Version 3.1.3.0 is affected.
- Version 3.1.4.0 is affected.
- Version 3.1.5.0 is affected.
- Version 3.1.6.0 is affected.
- Version 3.1.7.0 is affected.
- Version 3.1.8.0 is affected.
- Version 3.1.9.0 is affected.
- Version 3.1.10.0 is affected.
- Version 3.1.12.0 is affected.
- Version 3.1.13.0 is affected.
- Version 3.1.14.0 is affected.
- Version 3.1.15.0 is affected.
- Version 3.1.16.0 is affected.
- Version 3.1.17.0 is affected.
- Version 3.1.18.0 is affected.
- Version 3.1.19.0 is affected.
- Version 3.1.20.0 is affected.
- Version 3.1.21.0 is affected.
- Version 3.1.22.0 is affected.
- Version 3.1.23.0 is affected.
- Version 3.1.24.0 is affected.
- Version 3.1.25.0 is affected.
- Version 3.1.27.0 is affected.
- Version 3.1.28.0 is affected.
- Version 3.1.29.0 is affected.
- Version 3.1.30.0 is affected.
- Version 3.1.31.0 is affected.
- Version 3.1.32.0 is affected.
- Version 3.1.36.0 is affected.
- Version 3.1.38.0 is affected.
- Version 3.1.39.0 is affected.
- Version 3.1.40.0 is affected.
- Version 3.1.41.0 is affected.
- Version 3.1.42.0 is affected.
- Version 3.1.43.0 is affected.
- Version 3.1.45.0 is affected.
- Version 3.1.47.0 is affected.
- Version 3.1.48.0 is affected.
- Version 3.1.50.0 is affected.
- Version 3.1.51.0 is affected.
- Version 3.1.52.0 is affected.
- Version 3.1.53.0 is affected.
- Version 3.1.55.0 is affected.
- Version 3.1.56.0 is affected.
- Version 3.1.57.0 is affected.
- Version 3.1.58.0 is affected.
- Version 3.1.59.0 is affected.
- Version 3.1.60.0 is affected.
- Version 3.1.61.0 is affected.
- Version 3.1.62.0 is affected.
- Version 3.1.63.0 is affected.
- Version 3.1.64.0 is affected.
- Version 3.1.65.0 is affected.
- Version 3.1.66.0 is affected.
- Version 3.1.67.0 is affected.
- Version 3.1.69.0 is affected.
- Version 3.1.70.0 is affected.
- Version 3.1.71.0 is affected.
- Version 3.1.72.0 is affected.
- Version 3.1.73.0 is affected.
- Version 3.1.74.0 is affected.
- Version 3.1.75.0 is affected.
- Version 3.1.76.0 is affected.
- Version 3.1.77.0 is affected.
- Version 3.1.78.0 is affected.
- Version 3.1.81.0 is affected.
- Version 3.1.82.0 is affected.
- Version 3.1.83.0 is affected.
- Version 3.1.84.0 is affected.
- Version 3.2.1.0 is affected.
- Version 3.2.2.0 is affected.
- Version 3.3.0.0 is affected.
- Version 3.3.1.0 is affected.
- Version 3.3.2.0 is affected.
- Version 3.3.3.0 is affected.
- Version 3.3.4.0 is affected.
- Version 3.3.5.0 is affected.
- Version 3.3.7.0 is affected.
- Version 3.5.0.0 is affected.
- Version 3.5.1.0 is affected.
- Version 3.8.1.0 is affected.
- Version 3.6.0.0 is affected.
- Version 3.6.2.0 is affected.
- Version 3.9.3.0 is affected.
- Version 3.7.2.0 is affected.
- Version 3.7.0.0 is affected.
- Version 3.9.6.0 is affected.
- Version 3.10.0.0 is affected.
- Version 3.10.2.0 is affected.
- Version 3.7.4.0 is affected.
- Version 3.9.0.0 is affected.
- Version 3.5.2.0 is affected.
- Version 3.12.1.0 is affected.
- Version 3.6.1.0 is affected.
- Version 3.9.2.0 is affected.
- Version 3.6.3.0 is affected.
- Version 3.9.5.0 is affected.
- Version 3.7.1.0 is affected.
- Version 3.9.7.0 is affected.
- Version 3.7.3.0 is affected.
- Version 3.10.1.0 is affected.
- Version 3.9.1.0 is affected.
- Version 3.11.1.0 is affected.
- Version 7.0.0 is affected.
- Version 7.0.0.1 is affected.
- Version 7.0.1 is affected.
- Version 7.0.1.1 is affected.
- Version 7.0.2 is affected.
- Version 7.2.0 is affected.
- Version 7.0.2.1 is affected.
- Version 7.0.3 is affected.
- Version 7.2.0.1 is affected.
- Version 7.0.4 is affected.
- Version 7.2.1 is affected.
- Version 7.0.5 is affected.
- Version 7.3.0 is affected.
- Version 7.2.2 is affected.
- Version 7.2.3 is affected.
- Version 7.3.1 is affected.
- Version 7.2.4 is affected.
- Version 7.0.6 is affected.
- Version 7.2.5 is affected.
- Version 7.2.4.1 is affected.
- Version 7.3.1.1 is affected.
- Version 7.4.0 is affected.
- Version 7.0.6.1 is affected.
- Version 7.2.5.1 is affected.
- Version 7.4.1 is affected.
- Version 7.2.6 is affected.
- Version 7.0.6.2 is affected.
- Version 7.4.1.1 is affected.
- Version 7.2.7 is affected.
- Version 7.2.5.2 is affected.
- Version 7.3.1.2 is affected.
- Version 7.2.8 is affected.
- Version 7.6.0 is affected.
- Version 7.4.2 is affected.
- Version 7.2.8.1 is affected.
- Version 7.0.6.3 is affected.
- Version 7.4.2.1 is affected.
- Version 7.2.9 is affected.
- Version 7.0.7 is affected.
- Version 7.7.0 is affected.
- Version 7.4.2.2 is affected.
- Version 7.2.10 is affected.
- Version 7.6.1 is affected.
- Version 7.4.2.3 is affected.
- Version 7.0.8 is affected.
- Version 7.6.2 is affected.
- Version 7.7.10 is affected.
- Version 7.7.11 is affected.
- Version 7.0.8.1 is affected.
- Version 7.6.2.1 is affected.
- Version 7.7.10.1 is affected.
- Version 7.4.2.4 is affected.
- Version 7.2.10.2 is affected.
- Version 7.4.3 is affected.
- Version 7.6.4 is affected.
- Version 10.0.0 is affected.
- Version 7.4.4 is affected.
- Version 7.0.9 is affected.
- Version 7.2.11 is affected.
- Version 7.4.7 is affected.
- Version 17.12.1a is affected.
- Version 17.12.2 is affected.
- Version 17.13.1a is affected.
- Version 17.12.3 is affected.
- Version 17.14.1a is affected.
- Version 17.12.4 is affected.
- Version 17.12.3a is affected.
- Version 17.15.1a is affected.
- Version 17.16.1a is affected.
- Version 17.12.4a is affected.
- Version 17.15.2c is affected.
- Version 17.12.4b is affected.
- Version 17.15.2a is affected.
- Version 17.12.5 is affected.
- Version 17.17.1 is affected.
- Version 17.12.5a is affected.
- Version 17.15.3a is affected.
- Version 17.15.3 is affected.
- Version 17.12.5b is affected.
- Version 17.12.5c is affected.
- Version 17.15.4 is affected.
- Version 17.18.1 is affected.
- Version 17.18.1a is affected.
- Version 17.12.6 is affected.
- Version 17.15.4c is affected.
- Version 17.12.5d is affected.
- Version 17.18.2 is affected.
- Version 26.1.1 is affected.
- Version 17.15.5 is affected.
- Version 17.15.5a is affected.
- Version 17.12.7 is affected.
- Version 17.12.7a is affected.
- Version 17.12.7b is affected.
- Version 17.18.3a is affected.
- Version 17.12.8 is affected.
- Version 17.15.6 is affected.
- Version 17.18.4 is affected.
- Version 26.1.2 is affected.