CVE-2021-34478

high

Description

Microsoft Office Remote Code Execution Vulnerability

References

https://www.zerodayinitiative.com/advisories/ZDI-21-1024/

https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-34478

https://msrc.microsoft.com/update-guide/vulnerability/CVE-2021-34478

Details

Source: Mitre, NVD

Published: 2021-08-12

Updated: 2026-08-10

Risk Information

CVSS v2

Base Score: 6.8

Vector: CVSS2#AV:N/AC:M/Au:N/C:P/I:P/A:P

Severity: Medium

CVSS v3

Base Score: 7.8

Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

Severity: High

EPSS

EPSS: 0.52656