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.
History

Thu, 03 Sep 2026 15:45:00 +0000

Type Values Removed Values Added
First Time appeared Cisco
Cisco ios Xr Software
Vendors & Products Cisco
Cisco ios Xr Software

Thu, 03 Sep 2026 05:30:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'yes', 'Exploitation': 'none', 'Technical Impact': 'total'}, 'version': '2.0.3'}


Wed, 02 Sep 2026 16:30:00 +0000

Type Values Removed Values Added
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.
Title Cisco IOS XR Software Security Hardening Release: September 2026
Weaknesses CWE-664
References
Metrics cvssV3_1

{'score': 9.8, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H'}


cve-icon MITRE

Status: PUBLISHED

Assigner: cisco

Published:

Updated: 2026-09-03T03:56:33.256Z

Reserved: 2025-10-08T11:59:15.403Z

Link: CVE-2026-20274

cve-icon Vulnrichment

Updated: 2026-09-02T17:56:48.593Z

cve-icon NVD

Status : Awaiting Analysis

Published: 2026-09-02T17:17:32.630

Modified: 2026-09-03T13:04:39.223

Link: CVE-2026-20274

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-09-03T15:30:05Z