CVE-2026-20269
Received Received - Intake

Memory Corruption in Cisco IOS XE Software

Publication date: 2026-08-05

Last updated on: 2026-08-05

Assigner: Cisco Systems, Inc.

Description
As part of Cisco's ongoing commitment to proactive security and product quality, the Cisco IOS XE 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-2026-20269 are related to issues with improper control of a resource through its lifetime that are grouped under the Common Weakness Enumeration (CWE) Pillar CWE-664.

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Meta Information

Published
2026-08-05
Last Modified
2026-08-05
Generated
2026-08-05
AI Q&A
2026-08-05
EPSS Evaluated
N/A
NVD
CVE-2026-20269
EUVD
EUVD-2026-53455

Affected Vendors & Products

Showing 7 associated CPEs
Vendor Product Version / Range
cisco ios_xe *
cisco ios_xe 17.9.10
cisco ios_xe 17.12.8
cisco ios_xe 17.15.6
cisco ios_xe 17.18.4
cisco ios_xe 26.1.2
cisco ios_xe From 17.9 (inc) to 26.1 (inc)

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Exploitability

CWE
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KEV
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CWE ID Description
CWE-664 The product does not maintain or incorrectly maintains control over a resource throughout its lifetime of creation, use, and release.

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Executive Summary

CVE-2026-20269 is a vulnerability in Cisco IOS XE Software related to improper control of a resource through its lifetime, classified under CWE-664. This means the software may not properly manage system resources during operations, potentially leading to unintended behavior or crashes.

Detection Guidance

The provided CVE data does not include specific detection methods or commands for identifying CVE-2026-20269 on a network or system. Detection would typically involve checking the Cisco IOS XE Software version against the affected releases listed in Cisco's advisory.

Impact Analysis

This vulnerability could cause denial-of-service conditions, system instability, or crashes due to improper resource management. It may disrupt network operations if exploited, though it does not directly lead to data breaches or unauthorized access based on the provided details.

Compliance Impact

The provided CVE data does not specify direct impacts on compliance with standards like GDPR or HIPAA. The vulnerability relates to improper resource control (CWE-664) in Cisco IOS XE Software, which could potentially lead to system instability or denial of service (CVSS 8.6). Such issues may indirectly affect compliance if they disrupt security controls or data protection mechanisms.

Mitigation Strategies

Update Cisco IOS XE Software to the latest hardened release addressing CVE-2026-20269. Monitor Cisco's security advisories for patches and apply them promptly.

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