Microsoft Mpeg-2 Video Extension vulnerabilities

2 CVEs affecting Microsoft Mpeg-2 Video Extension, 0 known to be exploited (CISA KEV), with EPSS scores. Latest: CVE-2026-70343, published 2026-10-13.

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Known exploited (CISA KEV) first, then by EPSS exploit probability.

• CVE-2021-38644, published 2021-09-15. High severity, CVSS 7.8. EPSS: 2.3% chance of exploitation in the next 30 days. Microsoft MPEG-2 Video Extension Remote Code Execution Vulnerability
• CVE-2026-70343, published 2026-10-13. High severity, CVSS 8.8. EPSS: 0.8% chance of exploitation in the next 30 days. Heap-based buffer overflow in Microsoft MPEG-2 Video Extension allows an unauthorized attacker to execute code over a network.