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CVE-2026-20223

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CVSS

10.0

Reports

4

First seen

May 21, 2026

Last seen

May 28, 2026

Affected product

Cisco Secure Workload 3.9, 3.10, 4.0

Associated actors

Fox Tempest ×1 RondoDox ×1 Silver Fox ×1 TeamPCP ×1 UNG0002 ×1

Recent reports

Cisco Secure Workload Missing Authentication Vulnerability (CVE-2026-20223)

NICS TaiwanMay 28, 2026 Critical

Weekly Recap: Linux Flaws, Defender 0-Days, Router Botnets, and Supply Chain Chaos

The Hacker NewsMay 25, 2026 Critical

Cisco Patches CVSS 10.0 Secure Workload REST API Flaw Enabling Data Access

The Hacker NewsMay 22, 2026 Critical

Max severity Cisco Secure Workload flaw gives Site Admin privileges

Bleeping ComputerMay 21, 2026

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