U.S. Cybersecurity and Infrastructure Security Agency (CISA) has uncovered 66 new vulnerabilities that are exploited by attackers.

The agency urged federal agencies to apply available patches before April 15, 2022, to limit the risk of the bugs being exploited.

Based on evidence of active exploitation, the 66 bugs include current and older bugs in networking kit, several Windows bugs, and security appliances from D-Link, Cisco, Netgear, Citrix, Kuiper, Palo Alto, Sophos, Zyxel, and enterprise software from Oracle, OpenBSD, VMware, and others.

Some of the vulnerabilities identified vulnerabilities include a flaw affecting Watch Guard’s Firefox and XTM appliances (CVE-2022-26318), and another flaw impacting Mitel’s MiCollab, MiVoice Business Express Access Control Vulnerability (CVE-2022-26143).

Hackers exploited the Mitel bug to launch the TP240PhoneHome DDoS attack. A Windows Print Spooler Elevation of Privilege vulnerability, traced as CVE-2022-21999, has also been added to the list of bugs to be patched.