What is CVE-2026-70351?

CVE-2026-70351 is a security advisory published by Microsoft Security Response Center (MSRC) with Critical severity. Microsoft WebP Image Extension Remote Code Execution Vulnerability

Which CVE IDs does CVE-2026-70351 cover?

CVE-2026-70351 covers the following CVE IDs: CVE-2026-70351. Each CVE has its own detail page on EchelonGraph Pulse with the synthesized EG score.

What is the CVSS v3 score of CVE-2026-70351?

CVE-2026-70351 has a CVSS v3 base score of 8.8, published by Microsoft Security Response Center (MSRC).

Which products are affected by CVE-2026-70351?

CVE-2026-70351 affects 1 product, including: WebP Image Extension.

CVE-2026-70351CriticalCVSS 8.8

Microsoft WebP Image Extension Remote Code Execution Vulnerability

Vendor

Microsoft Security Response Center (MSRC)

Published

September 11, 2026

Last Modified

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🔗 CVE IDs covered (1)

CVE-2026-70351 →

📋 Description

Integer overflow or wraparound in Microsoft WebP Image Extension allows an unauthorized attacker to execute code over a network.

🎯 Affected products1

WebP Image Extension

✅ Remediation

KBRelease Note (Security Update) — fixed build 1.2.31.0

🔗 References (2)

advisoryhttps://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-70351
patchhttps://apps.microsoft.com/store/detail/webp-image-extensions/9PG2DK419DRG?hl=en-us&gl=us