What is CVE-2026-70343?

CVE-2026-70343 is a security advisory published by Microsoft Security Response Center (MSRC) with High severity. Microsoft MPEG-2 Video Extension Remote Code Execution Vulnerability

Which CVE IDs does CVE-2026-70343 cover?

CVE-2026-70343 covers the following CVE IDs: CVE-2026-70343. Each CVE has its own detail page on EchelonGraph Pulse with the synthesized EG score.

What is the CVSS v3 score of CVE-2026-70343?

CVE-2026-70343 has a CVSS v3 base score of 8.8, published by Microsoft Security Response Center (MSRC).

Which products are affected by CVE-2026-70343?

CVE-2026-70343 affects 1 product, including: MPEG-2 Video Extension.

CVE-2026-70343HighCVSS 8.8

Microsoft MPEG-2 Video Extension Remote Code Execution Vulnerability

Vendor

Microsoft Security Response Center (MSRC)

Published

October 13, 2026

Last Modified

—

🔗 CVE IDs covered (1)

CVE-2026-70343 →

📋 Description

Heap-based buffer overflow in Microsoft MPEG-2 Video Extension allows an unauthorized attacker to execute code over a network.

🎯 Affected products1

MPEG-2 Video Extension

✅ Remediation

KBStore App (Security Update) — fixed build 1.2.32.0

🔗 References (2)

advisoryhttps://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-70343
patchhttps://apps.microsoft.com/detail/9n95q1zzpmh4?launch=true&mode=full&hl=en-US&gl=US&ocid=bingwebsearch