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

ID: 8e2d777d-610f-59d7-8bb7-27d33fbcc70c

STIX ID: report--8e2d777d-610f-59d7-8bb7-27d33fbcc70c

Feed Name: The Register (Security)

Threat Score
75/100

Date Published: 2026-09-04

Date Updated: 2026-09-05

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Cisco disclosed multiple critical vulnerabilities in IOS XR and Nexus 9000 Series switches — including two 9.8-rated IOS XR flaws covering buffer and access-control issues and a 9.8-rated Nexus 9000 RCE (CVE-2026-20212) reachable via TCP ports 43210/43211 — and has released IOS XR updates and recommended iACL mitigations for affected devices while noting no observed exploitation.

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