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Fencer Vulns
high 7.8

CVE-2023-28311 json

Microsoft Word Remote Code Execution Vulnerability

published 2023-04-11 3 y ago modified 2026-06-17 4 mo ago also EUVD-2023-32018

cvss
7.8
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
2.7%
EPSS 2.7% chance of exploitation in 30 days, percentile 86%
public exploits
1
Exploit-DB

Summary

Microsoft Word Remote Code Execution Vulnerability

Patch / fix

  • Microsoft Microsoft Office 2019 for Mac 16.72.23040900
  • Microsoft Microsoft Office LTSC for Mac 2021 16.72.23040900

Timeline

  1. Published
  2. First public exploit (EDB-51376)

CISA SSVC

Exploitation
none
Automatable
no
Technical impact
total
Assessed
20 mo ago

Exploit prediction

2.72% chance of exploitation in the next 30 days, higher than 86% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

  • EDB-51376 Microsoft Word 16.72.23040900 - Remote Code Execution (RCE) remote, 2023-04-20

CVSS scores

assigned by version score vector
CNA 3.1 7.8 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
CNA 3.1 7.8 CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

Affected products

  • Microsoft Microsoft Office 2019 for Mac
  • Microsoft Microsoft 365 Apps for Enterprise
  • Microsoft Microsoft Office LTSC for Mac 2021

Classification

Weakness
  • CWE-122 Heap-based Buffer Overflow

References

Sources

Fencer Vulns 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.