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CVE record · CVE-2023-33133

Microsoft Excel Remote Code Execution Vulnerability

CVSS 7.8 HighCriticalEPSS 0.44 · 98th percentile

Critical, because:

  • CVSS score 7.8 (7.0 or more) and EPSS 0.44 (0.1 or more): a high score and a real chance of exploitation in the next 30 days.

How we decide what’s critical

Published by the CVE Program (CNA: microsoft) at 13 Jun 2023, 23:26 UTC. agentprime has not analysed this yet, so whether it affects any app is not known. This CVE names a vendor and product rather than a package, so the lockfile check doesn’t match it.

Affected products, as the CNA wrote them
VendorProductVersions
Microsoft Microsoft Office 2019
  • affected 19.0.0 to before https://aka.ms/OfficeSecurityReleases custom
Microsoft Microsoft Office 2019 for Mac
  • affected 16.0.0 to before 16.74.23061100 custom
Microsoft Microsoft Office Online Server
  • affected 16.0.1 to before 16.0.10399.20000 custom
Microsoft Microsoft 365 Apps for Enterprise
  • affected 16.0.1 to before https://aka.ms/OfficeSecurityReleases custom
Microsoft Microsoft Office LTSC for Mac 2021
  • affected 16.0.1 to before 16.74.23061100 custom
Microsoft Microsoft Office LTSC 2021
  • affected 16.0.1 to before https://aka.ms/OfficeSecurityReleases custom
Microsoft Microsoft Excel 2016
  • affected 16.0.0.0 to before 16.0.5400.1000 custom
Microsoft Microsoft Excel 2013 Service Pack 1
  • affected 15.0.0.0 to before 15.0.5563.1000 custom
Identifiers
CVE-2023-33133
CNA
microsoft
Weakness (CWE)
CWE-122
Tags
Published
13 Jun 2023
Updated
4 Nov 2025

Not analysed yet

We haven’t published our own analysis of this CVE. If a person reviews it, this page will say what’s affected and what has to be true for it to matter.

Severity and exploitation

ScoreRatingCVSSVectorSource
7.8 High 3.1 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 (microsoft)
  • CISA KEV Not listed.
  • EPSS 0.44, the 98th percentile, on 5 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

Timeline

This record came from the full history of the CVE Program, published 13 Jun 2023. New records show when each source confirmed them.

Sources

References from the CNA

Facts on this page come from the CVE List as the CNA published them, with CVSS from the sources named above, CISA KEV and FIRST EPSS. Vendors, products and versions are shown as the CNA wrote them. We don’t reproduce the CVE’s description.