CVE-2026-20236 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-2026-20236 are related to issues concerning incorrect calculation that are grouped under the Common Weakness Enumeration (CWE) Base CWE-682.
Vulnerability Analysis
CVE-2026-20236 is exploitable with network access, and does not require authorization privileges or user interaction. This vulnerability is considered to have a low attack complexity. The potential impact of an exploit of this vulnerability is considered to have no impact on confidentiality and integrity, and a high impact on availability.
Attack Vector:
NETWORK
Attack Complexity:
LOW
Privileges Required:
NONE
User Interaction:
NONE
Scope:
UNCHANGED
Confidentiality Impact:
NONE
Integrity Impact:
NONE
Availability Impact:
HIGH
Weakness Type
Incorrect Calculation
The software performs a calculation that generates incorrect or unintended results that are later used in security-critical decisions or resource management. When software performs a security-critical calculation incorrectly, it might lead to incorrect resource allocations, incorrect privilege assignments, or failed comparisons among other things. Many of the direct results of an incorrect calculation can lead to even larger problems such as failed protection mechanisms or even arbitrary code execution.
Products Associated with CVE-2026-20236
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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.