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Fencer Intel
high 8.4

CVE-2026-45474 json

Microsoft Office Remote Code Execution Vulnerability

published 5mo ago modified last mo. also EUVD-2026-35650

cvss
8.4
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.4%
EPSS 0.4% chance of exploitation in 30 days, percentile 30%
public exploits
0
none known

Summary

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

Patch / fix

  • Microsoft Microsoft Office 2016 16.0.5556.1005
  • Microsoft Microsoft Office 365 for Mac 16.110.26061317
  • Microsoft Microsoft Office for Android 16.0.20131.20024
  • Microsoft Microsoft Office LTSC for Mac 2021 16.110.26061317
  • Microsoft Microsoft Office LTSC for Mac 2024 16.110.26061317

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CISA SSVC

Exploitation
none
Automatable
no
Technical impact
total
Assessed
4mo ago

Exploit prediction

0.36% chance of exploitation in the next 30 days, higher than 30% of all scored CVEs (FIRST EPSS, 2026-11-09).

CVSS scores

assigned by version score vector
CNA 3.1 8.4 CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
CNA 3.1 8.4 CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Affected products

  • Microsoft Microsoft 365 Apps for Enterprise
  • Microsoft Microsoft Office 2016
  • Microsoft Microsoft Office 2019
  • Microsoft Microsoft Office 365 for Mac
  • Microsoft Microsoft Office for Android
  • Microsoft Microsoft Office LTSC 2021
  • Microsoft Microsoft Office LTSC 2024
  • Microsoft Microsoft Office LTSC for Mac 2021
  • Microsoft Microsoft Office LTSC for Mac 2024

Classification

Weakness

References

Sources

Fencer Intel keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.