CVE-2026-64907CWE-121

CVE-2026-64907

High · published August 11, 2026

CVSS v3.1
7.8
EPSS
0%
Percentile
39.1
In the wild
Unconfirmed
What it is

Stack-based buffer overflow in Microsoft Office Word allows an unauthorized attacker to execute code locally.

The record
Technical detail
CVSS v3.1
7.8 · HIGH
Vector
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
CVSS v4.0
Not supplied
EPSS
0.00466 · 39.1th percentile
Weakness
CWE-121 · Stack-based Buffer Overflow
Published
2026-08-11T21:18Z
Affected products (13)
ProductVersionsFixed in
microsoft/365_appsall versions—
microsoft/365_appsall versions—
microsoft/microsoft_365all versions—
microsoft/office_2019all versions—
microsoft/office_2019all versions—
microsoft/office_2021all versions—
microsoft/office_2021all versions—
microsoft/office_2021all versions—
microsoft/office_2024all versions—
microsoft/office_2024all versions—
microsoft/office_2024all versions—
microsoft/wordall versions—
microsoft/wordall versions—
References (1)
https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-64907 · [email protected]
EPSS history
Timeline
  • 11 AUG 17:06Z
    Microsoft Office Word Remote Code Execution Vulnerability
    cvelistv5