CVE-2026-70351CWE-122CWE-190

CVE-2026-70351

High · published September 8, 2026

CVSS v3.1
8.8
EPSS
1%
Percentile
56.8
In the wild
Unconfirmed
What it is

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

The record
Technical detail
CVSS v3.1
8.8 · HIGH
Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
CVSS v4.0
Not supplied
EPSS
0.00819 · 56.8th percentile
Weaknesses
CWE-122 · Heap-based Buffer Overflow; CWE-190 · Integer Overflow or Wraparound
Published
2026-09-08T22:20Z
Affected products (1)
ProductVersionsFixed in
microsoft/webp_image_extension< 1.2.31.01.2.31.0
References (1)
https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-70351 · [email protected]
EPSS history
Timeline
  • 10 SEP 03:17Z
    EPSS moved — → 1%
    epss
  • 08 SEP 17:12Z
    Microsoft WebP Image Extension Remote Code Execution Vulnerability
    cvelistv5