CISCO-SA-XE-SECUREBOOT-BYPASS-B6UYXYSZ: Cisco IOS XE Software for Cisco Catalyst and Rugged Series Switches Secure Boot Bypass Vulnerability

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PublisherCisco

Article IDCISCO-SA-XE-SECUREBOOT-BYPASS-B6UYXYSZ

Verified snapshot28 Sept 2026, 20:28 UTC

Linked CVEs1

Linked CVE reports

These are source relationships, not a claim that this article fixes every affected product or branch.

CVE-2026-20104Cisco Cisco IOS XE Software: Buffer Underwrite ('Buffer Underflow')

Source and provenance

Original title: Cisco IOS XE Software for Cisco Catalyst and Rugged Series Switches Secure Boot Bypass Vulnerability. Captured 28 Sept 2026, 20:28 UTC. The stored article is used for enrichment and change detection; BlackTree does not republish the publisher's full text here.

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