CVE-2026-70311CWE-416

CVE-2026-70311

High · published August 11, 2026

CVSS v3.1
7.8
EPSS
0%
Percentile
39.4
In the wild
Unconfirmed
What it is

Use after free 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 · 39.4th percentile
Weakness
CWE-416 · Use After Free
Published
2026-08-11T21:19Z
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-2026-70311 · [email protected]
EPSS history
Timeline
  • 11 AUG 17:05Z
    Microsoft Office Word Remote Code Execution Vulnerability
    cvelistv5