Cisco SD-WAN Zero-Day Exploited Before Disclosure

The Hacker News reports that a critical zero-day vulnerability in Cisco's SD-WAN software was exploited by attackers months before it was publicly disclosed. The flaw, identified as CVE-2026-20245, allows attackers to execute arbitrary commands with elevated privileges. Cisco has since released patches, but the incident underscores the risks associated with unpatched vulnerabilities.

Why this matters for UK organisations

For UK businesses using Cisco SD-WAN, this incident highlights the critical importance of maintaining up-to-date systems. Unpatched vulnerabilities can serve as entry points for attackers, leading to potential data breaches and operational disruptions. Ensuring timely patch management and maintaining a comprehensive inventory of network assets are essential steps in mitigating such risks.

What to review

Organisations should review their patch management processes to ensure that all systems, especially critical infrastructure, are regularly updated and patched. It is also advisable to conduct regular security assessments to identify and address potential vulnerabilities before they can be exploited by malicious actors.

Source: The Hacker News