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New Cisco DoS flaw requires manual reboot to revive devices

bleepingcomputer.com·May 6, 2026

Cisco has issued security updates to address a high-severity denial-of-service (DoS) vulnerability in its Crosswork Network Controller and Network Services Orchestrator software, which can be exploited remotely to crash unpatched systems, requiring a manual reboot for recovery. While this flaw has not yet been exploited in the wild, Cisco recommends that customers upgrade to the fixed software to prevent potential attacks.

Cisco has released security updates for a high-severity DoS vulnerability in their Crosswork Network Controller (CNC) and Network Services Orchestrator (NSO) that requires a manual reboot to recover affected systems. As someone focused on threat intelligence and incident response, it's crucial to ensure that your systems are patched with the fixed software versions to mitigate potential remote exploitation by unauthenticated actors. Prioritize this update in your vulnerability management process, especially if your organization relies on Cisco's CNC and NSO for network operations.

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