CVE-2026-70351

Microsoft WebP Image Extension Remote Code Execution Vulnerability

State: Published
Severity: 8.8 High
Published: Sep 8, 2026
Updated: Oct 31, 2026
Reserved: Aug 4, 2026

Description

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

Scores

CVSS	Score	Vector	Source
3.1	8.8 High	CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C	microsoft

Weaknesses

CWE-190 Integer Overflow or Wraparound
CWE-122 Heap-based Buffer Overflow

Affected Products

Product	Versions
WebP Image ExtensionMicrosoft	1.0.0.0 to before 1.2.31.0Affected

References

Microsoft WebP Image Extension Remote Code Execution Vulnerabilityvendor-advisorypatch

Every record here comes from the CVE Program’s CVE List. © 1999–2026 The MITRE Corporation. CVE is a registered trademark of The MITRE Corporation. The records are reproduced under the CVE Program terms of use.