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Vulnerability details

CVE-2026-50314

Microsoft 365 Apps for EnterpriseMicrosoft OfficeMicrosoft Office 365 for MacMicrosoft Office LTSCMicrosoft Office LTSC for Mac

Microsoft Office Remote Code Execution Vulnerability

CVSS 3.1
7.8High

Official description

Use after free in Microsoft Office allows an unauthorized attacker to execute code locally.

CVSS scores

ScoreVersionSourceVector
7.8High 3.1 CVEProject cvelistV5 (CNA) (microsoft) CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C

Affected products

VendorProductVersionsSource
Microsoft Microsoft 365 Apps for Enterprise 16.0.1 ≤ v < https://aka.ms/OfficeSecurityReleases CVEProject cvelistV5 (CNA)
Microsoft Microsoft Office 2016 16.0.0 ≤ v < 16.0.5561.1000 CVEProject cvelistV5 (CNA)
Microsoft Microsoft Office 2019 19.0.0 ≤ v < https://aka.ms/OfficeSecurityReleases CVEProject cvelistV5 (CNA)
Microsoft Microsoft Office 365 for Mac 1.0.0 ≤ v < 16.111.26071215 CVEProject cvelistV5 (CNA)
Microsoft Microsoft Office LTSC 2021 16.0.1 ≤ v < https://aka.ms/OfficeSecurityReleases CVEProject cvelistV5 (CNA)
Microsoft Microsoft Office LTSC 2024 16.0.0 ≤ v < https://aka.ms/OfficeSecurityReleases CVEProject cvelistV5 (CNA)
Microsoft Microsoft Office LTSC for Mac 2021 16.0.1 ≤ v < 16.111.26071215 CVEProject cvelistV5 (CNA)
Microsoft Microsoft Office LTSC for Mac 2024 16.0.0 ≤ v < 16.111.26071215 CVEProject cvelistV5 (CNA)

References and advisories

1
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Details

Published
2026-07-14
Last updated
2026-11-01
State
Published
Assigner (CNA)
microsoft

Exploit prediction (EPSS)

0.46%
Probability of exploitation in 30 days
40.6%
Percentile (among all CVEs)

SSVC assessment (CISA)

Automatable
No
Exploitation
None
Technical impact
Total

Weaknesses (CWE)

  • CWE-416
    Use After Free