Critical Cisco Secure Workload Vulnerability Enables Unauthorized API Access

Cybersecuritynews •Abinaya • May 21, 2026

Cisco has disclosed a critical security vulnerability in its Secure Workload platform that could allow unauthenticated attackers to gain unauthorized access to sensitive resources via internal APIs. The flaw, tracked as CVE-2026-20223, carries a maximum CVSS score of 10.0 and is categorized under CWE-306 (Missing Authentication for Critical Function). The issue stems from improper authentication […]

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This article is one source in a clustered incident — the cluster page carries the summary, timeline and every other outlet covering it.

Critical Zero-Day Vulnerability CVE-2026-20182 Exploited in Cisco SD-WAN Systems Cisco has disclosed a critical authentication bypass vulnerability, CVE-2026-20182, affecting its Catalyst SD-WAN Controller and Manager. This flaw allows unauthenticated remote attackers to bypass authentication and gain administrative privileges, enabling manipulation of network configurations. The vulnerability has a CVSS score of 10.0 and is actively exploited in the wild by a threat actor known as UAT-8616, who previously exploited a similar vulnerability, CVE-2026-20127. Cisco became aware of the exploitation in May 2026 and has released patches to address the issue. Organizations are urged to apply these updates immediately, as there are no effective workarounds. The vulnerability impacts all deployment types of the Cisco Catalyst SD-WAN, including cloud and on-premises solutions. Security advisories have been issued to monitor for unauthorized access attempts. 131 sources 87

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Critical Cisco Secure Workload Vulnerability Enables Unauthorized API Access

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