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CISA Known Exploited Vulnerabilities

KEV additions — March 2026

15 CVEs entered the KEV catalog in March 2026.

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Added March 25, 20261

CVECVSSDue date
CVE-2026-33017—Apr 8, 2026

Added March 20, 20263

CVECVSSDue date
CVE-2025-312778.8Apr 3, 2026
CVE-2025-3243210Apr 3, 2026
CVE-2025-540689.8Apr 3, 2026

Added March 19, 20261

CVECVSSDue date
CVE-2026-20131ransomware10Mar 22, 2026

Added March 18, 20261

CVECVSSDue date
CVE-2026-209639.8Mar 21, 2026

Added March 16, 20261

CVECVSSDue date
CVE-2025-478134.3Mar 30, 2026

Added March 13, 20262

CVECVSSDue date
CVE-2026-39098.8Mar 27, 2026
CVE-2026-39108.8Mar 27, 2026

Added March 11, 20261

CVECVSSDue date
CVE-2025-686138.8Mar 25, 2026

Added March 9, 20263

CVECVSSDue date
CVE-2021-220547.5Mar 23, 2026
CVE-2025-263999.8Mar 12, 2026
CVE-2026-16038.6Mar 23, 2026

Added March 3, 20262

CVECVSSDue date
CVE-2026-213857.8Mar 24, 2026
CVE-2026-227198.1Mar 24, 2026