CVE-2026-20276

8.6 Élevée

Publiée le 02/09/2026 à 19:17 · Modifiée le 18/09/2026 à 15:17 · Analysée par le NVD · Source : psirt@cisco.com

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-2026-20276 are related to insufficient control flow management issues that are grouped under the Common Weakness Enumeration (CWE) CWE-691.

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Produits concernés

Cisco IOS XR Software
Cisco ios xr

Scores CVSS

Version	Score	Source	Vecteur
3.1	8.6 Élevée	psirt@cisco.com	`CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H`
3.1	8.6 Élevée	nvd@nist.gov (NVD)	`CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H`

Faiblesses (CWE)

CWE-691

Références

https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-hardening-iosxr-qg64NcM Vendor Advisory
https://www.cve.org/Media/News/item/blog/2026/06/16/Preserving-Vulnerability-Level-Identification Not Applicable

Ailleurs

NVD
CVE.org
CIRCL Vulnerability-Lookup
CERT-FR
GitHub Advisories