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Cisco IOS XR Software — Vulnerabilities & Security Advisories 113

All 113 CVE vulnerabilities found in Cisco IOS XR Software, with AI-generated Chinese analysis, references, and POCs.

This page aggregates known security weaknesses for Cisco IOS XR Software, focusing on critical implementation flaws and configuration errors. It collects vulnerabilities reported against this specific router operating system, covering advisories published from 2009 through 2024. Readers can use this resource to track Cisco's security bulletins, analyze common weakness patterns like buffer overflows or authentication bypasses, and review the historical vulnerability profile of the product. The data is organized to support security operations teams in assessing exposure and prioritizing patches without needing to search individual CVE databases.

Vendor: n/a

CVE ID Title CVSS Severity Published
CVE-2026-20278 Cisco IOS XR Software Security Hardening Release: September 2026 CWE-707 8.8 High 2026-09-02
CVE-2026-20280 Cisco IOS XR Software Security Hardening Release: September 2026 CWE-703 8.8 High 2026-09-02
CVE-2026-20279 Cisco IOS XR Software Security Hardening Release: September 2026 CWE-284 9.8 Critical 2026-09-02
CVE-2026-20275 Cisco IOS XR Software Security Hardening Release: September 2026 CWE-682 8.8 High 2026-09-02
CVE-2026-20274 Cisco IOS XR Software Security Hardening Release: September 2026 CWE-664 9.8 Critical 2026-09-02
CVE-2026-20276 Cisco IOS XR Software Security Hardening Release: September 2026 CWE-691 8.6 High 2026-09-02
CVE-2026-20277 Cisco IOS XR Software Security Hardening Release: September 2026 CWE-693 8.2 High 2026-09-02
CVE-2026-20118 Cisco IOS-XR NCS 5500 and NCS 5700 Egress Packet Network Interfaces Aligner Interrupt Denial of Service Vulnerability CWE-460 6.8 Medium 2026-03-11
CVE-2026-20046 Cisco IOS XR Software CLI Privilege Escalation Vulnerability CWE-264 8.8 High 2026-03-11
CVE-2026-20074 Cisco IOS XR Software Multi-Instance Intermediate System-to-Intermediate System Denial of Service Vulnerability CWE-1287 7.4 High 2026-03-11
CVE-2026-20040 Cisco IOS XR Software CLI Privilege Escalation Vulnerability CWE-78 8.8 High 2026-03-11
CVE-2025-20340 Cisco IOS XR Address Resolution Protocol Broadcast Storm Vulnerability CWE-400 7.4 High 2025-09-10
CVE-2025-20159 Cisco IOS XR Software Management Interface ACL Bypass Vulnerability CWE-284 5.3 Medium 2025-09-10
CVE-2025-20248 Cisco IOS XR Software Image Verification Bypass Vulnerability CWE-347 6.0 Medium 2025-09-10
CVE-2025-20154 Cisco IOS, IOS XE and IOS XR Software TWAMP Denial of Service Vulnerability CWE-20 8.6 High 2025-05-07
CVE-2025-20209 Cisco IOS XR Software Internet Key Exchange Version 2 Denial of Service Vulnerability CWE-770 7.5 High 2025-03-12
CVE-2025-20177 Cisco IOS XR Software Image Verification Bypass Vulnerability CWE-274 6.7 Medium 2025-03-12
CVE-2025-20146 Cisco IOS XR Software for ASR 9000 Series Routers Layer 3 Multicast Routing Denial of Service Vulnerability CWE-20 8.6 High 2025-03-12
CVE-2025-20145 Cisco IOS XR Software Access Control List Bypass Vulnerability CWE-264 5.8 Medium 2025-03-12
CVE-2025-20144 Cisco IOS XR Software Access Control List Bypass Vulnerability CWE-284 4.0 Medium 2025-03-12
CVE-2025-20143 Cisco IOS XR Software Secure Boot Bypass Vulnerability CWE-347 6.7 Medium 2025-03-12
CVE-2025-20142 Cisco IOS XR Software for ASR 9000 Series Routers L2VPN Denial of Service Vulnerability CWE-20 8.6 High 2025-03-12
CVE-2025-20141 Cisco IOS XR Software Release 7.9.2 Denial of Service Vulnerabillity CWE-770 7.4 High 2025-03-12
CVE-2025-20138 Cisco IOS XR Software CLI Privilege Escalation Vulnerability CWE-78 8.8 High 2025-03-12
CVE-2025-20115 Cisco IOS XR Software Border Gateway Protocol Denial of Service Vulnerability CWE-120 8.6 High 2025-03-12
CVE-2021-1440 Cisco IOS XR Software BGP Resource Public Key Infrastructure Denial of Service Vulnerability CWE-617 6.8 Medium 2024-11-18
CVE-2022-20655 Cisco 多款产品操作系统命令注入漏洞 CWE-78 8.8 High 2024-11-15
CVE-2022-20846 Cisco IOS XR Software Cisco Discovery Protocol Buffer Overflow Vulnerability CWE-120 4.3 Medium 2024-11-15
CVE-2022-20845 Cisco Network Convergence System 4000 Series TL1 Denial of Service Vulnerability CWE-789 6.0 Medium 2024-11-15
CVE-2022-20849 Cisco IOS XR Software Broadband Network Gateway PPPoE Denial of Service Vulnerability CWE-391 6.1 Medium 2024-11-15

All 113 known CVE vulnerabilities affecting Cisco IOS XR Software with full Chinese analysis, references, and POCs where available.