CVE-2026-20274
Received Received - Intake

Improper Resource Control in Cisco IOS XR Software

Publication date: 2026-09-02

Last updated on: 2026-09-02

Assigner: Cisco Systems, Inc.

Description
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-2026-20274 are related to improper resource control issues that are grouped under the Common Weakness Enumeration (CWE) CWE-664.

CVSS Scores

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Meta Information

Published
2026-09-02
Last Modified
2026-09-02
Generated
2026-09-02
AI Q&A
2026-09-02
EPSS Evaluated
N/A
NVD
CVE-2026-20274
EUVD
EUVD-2026-70204

Affected Vendors & Products

Showing 1 associated CPE
Vendor Product Version / Range
cisco ios_xr_software *

Helpful Resources

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.

Attack-Flow Graph

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Executive Summary

CVE-2026-20274 is an improper resource control vulnerability in Cisco IOS XR Software. It falls under CWE-664, which involves failures in managing system resources properly. This could allow unauthorized access or disruption of services due to uncontrolled resource allocation.

Impact Analysis

This vulnerability could lead to high-impact consequences such as system crashes, unauthorized access, or denial of service. The CVSS score of 9.8 indicates it is highly severe, potentially affecting confidentiality, integrity, and availability of the system.

Compliance Impact

The provided CVE data does not specify direct impacts on compliance with standards like GDPR or HIPAA. The vulnerability involves improper resource control (CWE-664) with high CVSS severity, which could potentially lead to unauthorized access or system compromise, indirectly affecting compliance if exploited.

Mitigation Strategies

Apply the latest Cisco IOS XR Software updates from Cisco's official security advisories to address the improper resource control issues. Monitor Cisco's PSIRT notifications for patches and follow their hardening recommendations.

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