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CVE record · CVE-2021-40454

Rich Text Edit Control Information Disclosure Vulnerability

CVSS 5.5 MediumEPSS 0.0050 · 42nd percentile

Published by the CVE Program (CNA: microsoft) at 13 Oct 2021, 00:26 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 Windows 10 Version 1809
  • affected 10.0.0 to before 10.0.17763.2237 custom
Microsoft Windows Server 2019
  • affected 10.0.0 to before 10.0.17763.2237 custom
Microsoft Windows Server 2019 (Server Core installation)
  • affected 10.0.0 to before 10.0.17763.2237 custom
Microsoft Windows 10 Version 1909
  • affected 10.0.0 to before 10.0.18363.1854 custom
Microsoft Windows 10 Version 21H1
  • affected 10.0.0 to before 10.0.19043.1288 custom
Microsoft Windows Server 2022
  • affected 10.0.0 to before 10.0.20348.288 custom
Microsoft Windows 10 Version 2004
  • affected 10.0.0 to before 10.0.19041.1288 custom
Microsoft Windows Server version 2004
  • affected 10.0.0 to before 10.0.19041.1288 custom
Microsoft Windows 10 Version 20H2
  • affected 10.0.0 to before 10.0.19042.1288 custom
Microsoft Windows Server version 20H2
  • affected 10.0.0 to before 10.0.19042.1288 custom
Microsoft Windows 11 version 21H2
  • affected 10.0.0 to before 10.0.22000.258 custom
Microsoft Windows 10 Version 1507
  • affected 10.0.0 to before 10.0.10240.19086 custom
Microsoft Windows 10 Version 1607
  • affected 10.0.0 to before 10.0.14393.4704 custom
Microsoft Windows Server 2016
  • affected 10.0.0 to before 10.0.14393.4704 custom
Microsoft Windows Server 2016 (Server Core installation)
  • affected 10.0.0 to before 10.0.14393.4704 custom
Microsoft Windows 8.1
  • affected 6.3.0 to before 6.3.9600.20144 custom
Microsoft Windows Server 2012
  • affected 6.2.0 to before 6.2.9200.23490 custom
Microsoft Windows Server 2012 (Server Core installation)
  • affected 6.2.0 to before 6.2.9200.23490 custom
Microsoft Windows Server 2012 R2
  • affected 6.3.0 to before 6.3.9600.20144 custom
Microsoft Windows Server 2012 R2 (Server Core installation)
  • affected 6.3.0 to before 6.3.9600.20144 custom
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 16.54.21101001 custom
Microsoft Microsoft 365 Apps for Enterprise
  • affected 16.0.1 to before https://aka.ms/OfficeSecurityReleases custom
Microsoft Microsoft Office 2016
  • affected 16.0.0 to before 16.0.5227.1000 custom
Microsoft Microsoft Office 2013 Service Pack 1
  • affected 15.0.0 to before 15.0.5389.1000 custom
Microsoft Microsoft Office LTSC 2021
  • affected 16.0.1 to before https://aka.ms/OfficeSecurityReleases custom
Microsoft Microsoft Office LTSC for Mac 2021
  • affected 16.0.1 to before 16.54.21101001 custom
Identifiers
CVE-2021-40454
CNA
microsoft
Tags
Published
13 Oct 2021
Updated
4 Aug 2024

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
5.5 Medium 3.1 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N/E:F/RL:O/RC:C CNA (microsoft)
  • CISA KEV Not listed.
  • EPSS 0.0050, the 42nd 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 Oct 2021. 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.