CWE-682 Incorrect Calculation in Cisco IOS XR Software
CVE-2026-20275 Published on September 2, 2026
Cisco IOS XR Software Security Hardening Release: September 2026
As part of Cisco's ongoing commitment to proactive security and product quality, the Cisco IOS XR Software engineering team has conducted a comprehensive internal security review. This review resulted in a software hardening releases that address multiple internally discovered vulnerabilities.
The vulnerabilities tracked by CVE-2026-20275 are related to incorrect calculation issues that are grouped under the Common Weakness Enumeration (CWE) CWE-682.
Vulnerability Analysis
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-2026-20275
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Affected Versions
Cisco IOS XR Software:- Version 6.5.29 is affected.
- Version 7.0.1 is affected.
- Version 6.5.26 is affected.
- Version 6.5.25 is affected.
- Version 6.5.28 is affected.
- Version 6.5.90 is affected.
- Version 7.1.1 is affected.
- Version 7.0.90 is affected.
- Version 6.7.1 is affected.
- Version 7.0.2 is affected.
- Version 7.1.15 is affected.
- Version 7.2.1 is affected.
- Version 7.1.2 is affected.
- Version 6.7.2 is affected.
- Version 7.0.11 is affected.
- Version 7.0.12 is affected.
- Version 7.0.14 is affected.
- Version 7.1.25 is affected.
- Version 7.2.12 is affected.
- Version 7.3.1 is affected.
- Version 7.1.3 is affected.
- Version 6.7.3 is affected.
- Version 7.4.1 is affected.
- Version 7.2.2 is affected.
- Version 6.7.4 is affected.
- Version 6.5.31 is affected.
- Version 7.3.15 is affected.
- Version 7.3.16 is affected.
- Version 6.8.1 is affected.
- Version 7.4.15 is affected.
- Version 6.5.32 is affected.
- Version 7.3.2 is affected.
- Version 7.5.1 is affected.
- Version 7.4.16 is affected.
- Version 7.3.27 is affected.
- Version 7.6.1 is affected.
- Version 7.5.2 is affected.
- Version 7.8.1 is affected.
- Version 7.6.15 is affected.
- Version 7.5.12 is affected.
- Version 7.8.12 is affected.
- Version 7.3.3 is affected.
- Version 7.7.1 is affected.
- Version 6.8.2 is affected.
- Version 7.3.4 is affected.
- Version 7.4.2 is affected.
- Version 6.7.35 is affected.
- Version 6.9.1 is affected.
- Version 7.6.2 is affected.
- Version 7.5.3 is affected.
- Version 7.7.2 is affected.
- Version 6.9.2 is affected.
- Version 7.9.1 is affected.
- Version 7.10.1 is affected.
- Version 7.8.2 is affected.
- Version 7.5.4 is affected.
- Version 6.5.33 is affected.
- Version 7.8.22 is affected.
- Version 7.7.21 is affected.
- Version 7.9.2 is affected.
- Version 7.3.5 is affected.
- Version 7.5.5 is affected.
- Version 7.11.1 is affected.
- Version 7.9.21 is affected.
- Version 7.10.2 is affected.
- Version 24.1.1 is affected.
- Version 7.6.3 is affected.
- Version 7.3.6 is affected.
- Version 7.5.52 is affected.
- Version 7.11.2 is affected.
- Version 24.2.1 is affected.
- Version 24.1.2 is affected.
- Version 24.2.11 is affected.
- Version 24.3.1 is affected.
- Version 24.4.1 is affected.
- Version 24.2.2 is affected.
- Version 7.8.23 is affected.
- Version 7.11.21 is affected.
- Version 24.2.20 is affected.
- Version 24.3.2 is affected.
- Version 24.4.10 is affected.
- Version 6.5.35 is affected.
- Version 25.1.1 is affected.
- Version 24.4.2 is affected.
- Version 24.3.20 is affected.
- Version 24.4.15 is affected.
- Version 25.2.1 is affected.
- Version 6.5.351 is affected.
- Version 25.1.2 is affected.
- Version 24.3.30 is affected.
- Version 25.3.1 is affected.
- Version 6.5.352 is affected.
- Version 24.4.30 is affected.
- Version 24.2.21 is affected.
- Version 25.4.1 is affected.
- Version 25.2.2 is affected.
- Version 25.2.15 is affected.
- Version 7.2.0 is affected.
- Version 7.0.0 is affected.
- Version 25.2.30 is affected.
- Version 6.5.353 is affected.
- Version 26.1.1 is affected.
- Version 25.1.30 is affected.
- Version 25.3.15 is affected.
- Version 26.2.100 is affected.
- Version 25.4.2 is affected.
- Version 26.2.1 is affected.
- Version 25.4.30 is affected.
- Version 26.1.2 is affected.
- Version 25.4.201 is affected.
- Version 26.2.101 is affected.