Cisco Catalyst SD-WAN Controller 0

Cybersecuritynews •Guru Baran • May 15, 2026

A maximum-severity zero-day vulnerability in Cisco Catalyst SD-WAN Controller is being actively exploited in the wild, allowing unauthenticated remote attackers to fully bypass authentication and seize administrative control of enterprise network infrastructure. Tracked as CVE-2026-20182 with a CVSS score of 10.0, the flaw puts SD-WAN deployments across on-premises, cloud, and government environments at critical risk. […]

The full story

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

Extracted Entities

Cisco Catalyst SD-WAN Controller 0

The full story

Extracted Entities

Attack Types (1)

CVEs (1)

CWE Weaknesses (1)

Industries (1)

Platforms (1)