CVE-2026-20276
published 2026-09-02CVE-2026-20276: As part of Cisco's ongoing commitment to proactive security and product quality, the Cisco IOS XR Software engineering team has conducted a comprehensive…
PriorityP350high8.6CVSS 3.1
AVNACLPRNUINSCCNINAH
EPSS
0.25%
16.6th percentile
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.
Affected
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VulDB
Cisco IOS XR Software up to 26.2.101 Control Flow Management insufficient control flow management (EUVD-2026-70203)
vuldb·2026-09-02·CVSS 8.6
CVE-2026-20276 [HIGH] Cisco IOS XR Software up to 26.2.101 Control Flow Management insufficient control flow management (EUVD-2026-70203)
A vulnerability was found in Cisco IOS XR Software. It has been classified as critical. This affects an unknown part of the component Control Flow Management. Performing a manipulation results in insufficient control flow management.
This vulnerability is known as CVE-2026-20276. Remote exploitation of the attack is possible. No exploit is available.
Upgrading the affected component is recommended.
GHSA
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.
ghsa_unreviewed·2026-09-02·CVSS 8.6
CVE-2026-20276 [HIGH] CWE-691 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.
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.
No detection rules found.
No public exploits indexed.
2026-09-02
Published