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CVE record · CVE-2023-21535

Windows Secure Socket Tunneling Protocol (SSTP) Remote Code Execution Vulnerability

CVSS 8.1 HighEPSS 0.011 · 66th percentile

Published by the CVE Program (CNA: microsoft) at 10 Jan 2023, 00:00 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 10.0.17763.0 to before 10.0.17763.3887 custom
Microsoft Windows 10 Version 1809
  • affected 10.0.0 to before 10.0.17763.3887 custom
Microsoft Windows Server 2019
  • affected 10.0.17763.0 to before 10.0.17763.3887 custom
Microsoft Windows Server 2019 (Server Core installation)
  • affected 10.0.17763.0 to before 10.0.17763.3887 custom
Microsoft Windows Server 2022
  • affected 10.0.20348.0 to before 10.0.20348.1487 custom
Microsoft Windows 10 Version 20H2
  • affected 10.0.0 to before 10.0.19042.2486 custom
Microsoft Windows 11 version 21H2
  • affected 10.0.0 to before 10.0.22000.1455 custom
Microsoft Windows 10 Version 21H2
  • affected 10.0.19043.0 to before 10.0.19044.2486 custom
Microsoft Windows 11 version 22H2
  • affected 10.0.22621.0 to before 10.0.22621.1105 custom
Microsoft Windows 10 Version 22H2
  • affected 10.0.19045.0 to before 10.0.19045.2486 custom
Microsoft Windows 10 Version 1507
  • affected 10.0.10240.0 to before 10.0.10240.19685 custom
Microsoft Windows 10 Version 1607
  • affected 10.0.14393.0 to before 10.0.14393.5648 custom
Microsoft Windows Server 2016
  • affected 10.0.14393.0 to before 10.0.14393.5648 custom
Microsoft Windows Server 2016 (Server Core installation)
  • affected 10.0.14393.0 to before 10.0.14393.5648 custom
Microsoft Windows 8.1
  • affected 6.3.0 to before 6.3.9600.20778 custom
Microsoft Windows Server 2008 Service Pack 2
  • affected 6.0.6003.0 to before 6.0.6003.21872 custom
Microsoft Windows Server 2008 Service Pack 2 (Server Core installation)
  • affected 6.0.6003.0 to before 6.0.6003.21872 custom
Microsoft Windows Server 2008 Service Pack 2
  • affected 6.0.6003.0 to before 6.0.6003.21872 custom
Microsoft Windows Server 2012
  • affected 6.2.9200.0 to before 6.2.9200.24075 custom
Microsoft Windows Server 2012 (Server Core installation)
  • affected 6.2.9200.0 to before 6.2.9200.24075 custom
Microsoft Windows Server 2012 R2
  • affected 6.3.9600.0 to before 6.3.9600.20778 custom
Microsoft Windows Server 2012 R2 (Server Core installation)
  • affected 6.3.9600.0 to before 6.3.9600.20778 custom
Identifiers
CVE-2023-21535
CNA
microsoft
Weakness (CWE)
CWE-591
Tags
Published
10 Jan 2023
Updated
1 Jan 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
8.1 High 3.1 CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C CNA (microsoft)
  • CISA KEV Not listed.
  • EPSS 0.011, the 66th 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 10 Jan 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.