EUVD-2026-70203

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. Th...

CVE-2026-20276

CVE-2026-20276 affects Cisco IOS XR Software and stems from insufficient control flow management (CWE-691), identified during an internal security review as part of a September 2026 hardening release. The CVSS 3.1 score is 8.6 (HIGH) with a network attack vector, no privileges required, no user i...

CVE-2026-20277 Cisco IOS XR Software Security Hardening Release: September 2026

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. Th...

CVE-2026-20277 Cisco IOS XR Software Security Hardening Release: September 2026

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. Th...

CVE-2026-20277

Cisco IOS XR Software is affected by multiple internally discovered protection mechanism failure vulnerabilities (CWE-693), identified during a comprehensive internal security review. The issues carry a CVSS v3.1 score of 8.2 (HIGH) , with primarily an availability impact and a low integrity impa...

EUVD-2026-70202

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. Th...

Cisco IOS XR Software Security Hardening Release: September 2026

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 software hardening releases that address multiple internally discovered vulnerabilities. Thes...

CVE-2026-20276: Insufficient Control Flow Management

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. Th...

CVE-2026-20274: Improper Control of a Resource Through its Lifetime

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. Th...

PT-2026-84811

Name of the Vulnerable Software and Affected Versions Cisco IOS XR Software affected versions not specified Description Improper access control issues exist within the software, which are categorized under Common Weakness Enumeration CWE CWE-284. This refers to a situation where the software does...

PT-2026-84812

Name of the Vulnerable Software and Affected Versions Cisco IOS XR Software affected versions not specified Description An issue exists involving the improper checking or handling of exceptional conditions. This relates to Common Weakness Enumeration CWE CWE-703, which occurs when a program does...

PT-2026-84806

Name of the Vulnerable Software and Affected Versions Cisco IOS XR Software affected versions not specified Description An improper resource control issue exists within the software, which could lead to a security compromise. This issue is categorized under CWE-664, which refers to an improper...

PT-2026-84809

Name of the Vulnerable Software and Affected Versions Cisco IOS XR Software affected versions not specified Description Protection mechanism failure issues were identified during an internal security review. These issues are categorized under CWE-693, which refers to a failure to protect against ...

CVE-2026-20279: Improper Access Control

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. Th...

CVE-2026-20278: Improper Neutralization

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. Th...

CVE-2026-20275: Incorrect Calculation

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. Th...

CVE-2026-20280: Improper Check or Handling of Exceptional Conditions

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. Th...

CVE-2026-20277: Protection Mechanism Failure

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. Th...

PT-2026-84807

Name of the Vulnerable Software and Affected Versions Cisco IOS XR Software affected versions not specified Description An issue exists involving incorrect calculation errors, categorized under CWE-682, which refers to a correctness issue where a program performs an operation on a buffer that is...

PT-2026-84810

Name of the Vulnerable Software and Affected Versions Cisco IOS XR Software affected versions not specified Description An internal security review identified issues related to improper neutralization, which occurs when software fails to properly clean or filter input data before using it in a wa...