SARA / Free Tools / CVE / CVE-2023-41773

CVE-2023-41773 — Layer 2 Tunneling Protocol Remote Code Execution Vulnerability

Layer 2 Tunneling Protocol Remote Code Execution Vulnerability

CVSS

8.1 HIGH

EPSS

22.00% (top 55.90%)

CWE

CWE-416

Published

2023-10-10T17:07:29.720Z

Last modified

2025-04-14T22:45:57.365Z

CVSS vector

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

01What is this vulnerability?

Layer 2 Tunneling Protocol Remote Code Execution Vulnerability

Vendor	Product	Versions
Microsoft	Windows 10 Version 1809	10.0.17763.0
Microsoft	Windows 10 Version 1809	10.0.0
Microsoft	Windows Server 2019	10.0.17763.0
Microsoft	Windows Server 2019 (Server Core installation)	10.0.17763.0
Microsoft	Windows Server 2022	10.0.20348.0
Microsoft	Windows 11 version 21H2	10.0.0
Microsoft	Windows 10 Version 21H2	10.0.19043.0
Microsoft	Windows 11 version 22H2	10.0.22621.0
Microsoft	Windows 10 Version 22H2	10.0.19045.0
Microsoft	Windows 10 Version 1507	10.0.10240.0
Microsoft	Windows 10 Version 1607	10.0.14393.0
Microsoft	Windows Server 2016	10.0.14393.0
Microsoft	Windows Server 2016 (Server Core installation)	10.0.14393.0
Microsoft	Windows Server 2008 Service Pack 2	6.0.6003.0
Microsoft	Windows Server 2008 Service Pack 2 (Server Core installation)	6.0.6003.0
Microsoft	Windows Server 2008 Service Pack 2	6.0.6003.0
Microsoft	Windows Server 2008 R2 Service Pack 1	6.1.7601.0
Microsoft	Windows Server 2008 R2 Service Pack 1 (Server Core installation)	6.1.7601.0
Microsoft	Windows Server 2012	6.2.9200.0
Microsoft	Windows Server 2012 (Server Core installation)	6.2.9200.0
Microsoft	Windows Server 2012 R2	6.3.9600.0
Microsoft	Windows Server 2012 R2 (Server Core installation)	6.3.9600.0

Not currently listed on the CISA Known Exploited Vulnerabilities (KEV) catalog. EPSS is the best forward-looking signal — see the EPSS row above.

Patch to a fixed version listed in the vendor advisory (see references below).
Mitigate with WAF rules, network egress filters, or feature flags where the patch is not yet available.
Hunt historical logs for exploitation indicators — see Detection signatures below.

For the full vendor write-up, exploit chains, and reference implementations, see the references list in section 09.

Open the Sigma generator with a pre-filled prompt for this CVE to draft a starting detection in your stack of choice:

No directly-cited follow-up CVEs in the KB record for this advisory. The references list in section 09 carries the vendor cross-references.

msrc.microsoft.com — https://msrc.microsoft.com/update-guide/vulnerability/CVE-2023-41773

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