CISA flags new SD-WAN flaw as actively exploited in attacks

BleepingComputer

April 21, 2026 at 12:30 PM

Actively Exploited

Overview

The Cybersecurity and Infrastructure Security Agency (CISA) has issued an urgent warning regarding a vulnerability in the Catalyst SD-WAN Manager, which has been confirmed as actively exploited in attacks. U.S. government agencies have just four days to secure their systems against this threat. Attackers may be taking advantage of this flaw to gain unauthorized access or disrupt services. This situation emphasizes the need for agencies to promptly patch their systems to mitigate potential risks. Failure to address the vulnerability could lead to significant security breaches and data loss.

Key Takeaways

Active Exploitation: This vulnerability is being actively exploited by attackers. Immediate action is recommended.
Affected Systems: Catalyst SD-WAN Manager
Action Required: Agencies should apply security patches as soon as they are made available by the vendor.
Timeline: Newly disclosed

Original Article Summary

CISA has given U.S. government agencies four days to secure their systems against another Catalyst SD-WAN Manager vulnerability it flagged as actively exploited in attacks. [...]

Impact

Catalyst SD-WAN Manager

Exploitation Status

This vulnerability is confirmed to be actively exploited by attackers in real-world attacks. Organizations should prioritize patching or implementing workarounds immediately.

Timeline

Newly disclosed

Remediation

Agencies should apply security patches as soon as they are made available by the vendor. Regularly updating systems and monitoring for unusual activity are also recommended. Specific patch numbers or versions were not provided in the article.

Additional Information

This threat intelligence is aggregated from trusted cybersecurity sources. For the most up-to-date information, technical details, and official vendor guidance, please refer to the original article linked below.

Related Topics: This incident relates to Vulnerability, Patch.

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