IOS XR

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Mentions · 7d0
Mentions · 30d1
All mentions5
First seenSep 2, 2026
Last mentioned9d ago

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5 articles · newest first

Cisco patches 34 flaws, including critical Expressway RCE CVE-2026-76466

Fixes include Expressway X15.5.20 and Snort 3.12.4.0; Cisco says none are known to be exploited.

SecurityWeekOct 22, 10:05 UTC · 9d agoVulnerabilityCVE-2026-76466 CVE-2026-76473 CVE-2026-76474+56 · 3 reads

Cisco IOS XR Software Security Hardening Release: September 2026

Cisco released IOS XR security hardening fixes for multiple internally discovered vulnerabilities, grouped by CWE class, with no known active exploitation.

Cisco Security AdvisoriesSep 4, 18:57 UTC · Sep 4, 2026Advisory1 · 1 read

Cisco searched for IOS XR bugs and found so many it rolled them into an update release

Cisco patched three critical flaws, including CVE-2026-20212 unauthenticated remote root code execution in Nexus 9000 switches; no exploitation observed yet.

The Register · SecuritySep 4, 02:18 UTC · Sep 4, 2026VulnerabilityCVE-2026-20274 CVE-2026-20279 CVE-2026-202121 · 1 read

Critical Cisco Nexus 9000 Flaw Lets Unauthenticated Remote Attackers Run Code as Root

Cisco patches critical CVE-2026-20212 (CVSS 9.8) in Nexus 9000 switches allowing unauthenticated remote root code execution, plus IOS XR hardening release.

The Hacker NewsSep 3, 15:52 UTC · Sep 3, 2026VulnerabilityCVE-2026-20212 CVE-2026-20274 CVE-2026-20279+21

Cisco Advance Notification for Publication of September 2, 2026, Security Advisories

Cisco PSIRT published September 2, 2026 advisories including critical IOS XR hardening fixes and a Nexus 9000 remote code execution flaw.

Cisco Security AdvisoriesSep 2, 16:02 UTC · Sep 2, 2026AdvisoryCVE-2026-20277 CVE-2026-20278 CVE-2026-20280+62 · 1 read

Related CVEs

by mentions

CVE-2026-20274<1%9.8
Critical Improper Resource Control Flaws in Cisco IOS XR Software
published Sep 2, 2026Cisco IOS XR Software
CVE-2026-20212<1%9.8
Unauthenticated RCE in Cisco Nexus 9000 Switches with Silicon One Integration
published Sep 2, 2026Cisco Nexus 9000 Series Switches with Silicon One integration
CVE-2026-20279<1%9.8
Critical Improper Access Control in Cisco IOS XR Software
published Sep 2, 2026Cisco IOS XR Software
CVE-2026-20280<1%8.8
Improper Exception-Condition Handling (CWE-703) in Cisco IOS XR Software
published Sep 2, 2026Cisco IOS XR Software
CVE-2026-20275<1%8.8
Incorrect Calculation Vulnerabilities in Cisco IOS XR Software
published Sep 2, 2026Cisco IOS XR Software
CVE-2026-20276<1%8.6
Unauthenticated Remote DoS Flaws in Cisco IOS XR Software
published Sep 2, 2026Cisco IOS XR Software
CVE-2026-20277<1%8.2
Protection Mechanism Failures in Cisco IOS XR Software (CVSS 8.2)
published Sep 2, 2026Cisco IOS XR Software
CVE-2026-202367.5
Incorrect-calculation denial of service in Cisco Snort 3
published 9d agoCisco Open Source Snort 3 Software
CVE-2026-765057.5
Unauthenticated DoS in Cisco IOS XR IPv4 for-us handling
published 9d agoCisco IOS XR Software on ASR 9000 and 9900 Series Aggregation Services Routers and ASR 9902 and 9903 Compact High-Performance
CVE-2026-764625.5
A vulnerability in the interprocess communication (IPC) channel of the Secure Firewall Posture module in Cisco Secure Client could allow an authenticated…
published 9d ago

Appears with

Ciscovendor · 5
Nexus 9000product · 3
NCS 5700 Seriesproduct · 1
Unity Connectionproduct · 1
Snort 3product · 1
Cisco PSIRTorganization · 1
Secure Clientproduct · 1
Desk Phone 9800 Seriesproduct · 1
Cisco 8000 Seriesproduct · 1
Silicon Oneproduct · 1
NX-OSproduct · 1
Expressway Seriesproduct · 1
Unified Communications Managerproduct · 1

Entities are extracted by the model from each article. First seen Sep 2, 2026, last mentioned 9d ago. Watching keeps it in this browser only (no account); the watchlist page and dashboard alerts use it.