AlertsCisco Security Advisory

Number: AV21-598
Date: 25 November 2021

On 24 November 2021 Cisco published a Security Advisory to address vulnerabilities in the following product:

  • Cisco Expressway Series – versions prior to X14.0.4 and X14.1

Cisco is aware that an exploit for CVE-2021-40438 exists in the wild.

The Cyber Centre encourages users and administrators to review the provided web link and apply the necessary updates once available.

Cisco Expressway Series

Note to Readers

The Canadian Centre for Cyber Security (Cyber Centre) operates as part of the Communications Security Establishment. We are Canada’s national authority on cyber security and we lead the government’s response to cyber security events. As Canada's national computer security incident response team, the Cyber Centre works in close collaboration with government departments, critical infrastructure, Canadian businesses and international partners to prepare for, respond to, mitigate, and recover from cyber events. We do this by providing authoritative advice and support, and coordinating information sharing and incident response. The Cyber Centre is outward-facing, welcoming partnerships that help build a stronger, more resilient cyber space in Canada.


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