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The IT pulse, every Friday.

A weekly briefing on the developments shaping enterprise IT, cloud, AI, cybersecurity and SaaS, sourced from reputable publishers across the past seven days, interpreted by BiVi Intelligence for IT leaders, with every story linked back to its original report. The previous fortnight stays available below.

Cybersecurity

Cisco Reports Critical SD-WAN Zero-Day Exploit via Authentication Bypass

14 May 2026

Cisco has issued an alert regarding a critical authentication bypass vulnerability in Catalyst SD-WAN Controllers that has been actively exploited in the wild to gain administrator privileges.

Cisco Reports Critical SD-WAN Zero-Day Exploit via Authentication Bypass

Cisco has disclosed a critical security vulnerability, tracked as CVE-2026-20182, affecting its Catalyst SD-WAN Controller. This flaw allows remote attackers to bypass authentication and gain full administrative privileges on targeted devices. The company confirmed that it detected active exploitation of the vulnerability in zero-day attacks prior to the official disclosure. The security flaw stems from an insufficient validation of authentication credentials within the SD-WAN architecture.

The vulnerability impacts Cisco Catalyst SD-WAN Controller software and can lead to unauthorized access to the underlying operating system. Once an attacker gains administrative control, they can potentially manage or disrupt the entire software-defined wide area network. Cisco has released software updates to address the security gap and is urging organizations to transition to fixed releases immediately to prevent unauthorized access and infrastructure compromise. No workarounds are currently available to mitigate the risk outside of installing the patched firmware.

Organizations utilizing the Catalyst SD-WAN solution should prioritize auditing their controller instances and reviewing system logs for signs of unauthorized administrative activity. Given the zero-day status and the administrative-level access granted by successful exploitation, rapid patching is necessary to maintain network integrity. This incident highlights the ongoing targeting of networking infrastructure by sophisticated actors seeking persistent access to corporate environments.

For CIOs and IT operations leaders, this development necessitates an immediate assessment of the SD-WAN security perimeter. Failure to update affected controllers leaves the core network management layer vulnerable to total takeover by external threats. Technical teams must coordinate with their internal security operations centers to deploy the necessary Cisco patches and verify the security posture of their wide area network deployments to ensure business continuity and data protection.

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