Summary
Impact: Remote Code Execution. Microsoft rating: Important. Not known to be exploited — Exploitation Less Likely. Customer action: Required.
Details
According to the CVSS metric, the attack vector is adjacent (AV:A). What does that mean for this vulnerability?
Successful exploitation of this vulnerability requires that an attacker will need to first gain access to the restricted network before running an attack.
According to the CVSS metric, user interaction is required (UI:R). What interaction would the user have to do?
This vulnerability could be triggered when a windows client connects to a malicious remote share.
According to the CVSS metric, privileges required is low (PR:L). What does that mean for this vulnerability?
Any authenticated attacker could trigger this vulnerability. It does not require admin or other elevated privileges.
Security updates
10.0.17763.4010 — https://support.microsoft.com/help/5022840
10.0.20348.1547 — https://support.microsoft.com/help/5022842
10.0.20348.1540 — https://support.microsoft.com/help/5022921
10.0.19042.2604 — https://support.microsoft.com/help/5022834
10.0.22621.1574 — https://support.microsoft.com/help/5022836
10.0.22621.1265 — https://support.microsoft.com/help/5022845
10.0.10240.19747 — https://support.microsoft.com/help/5022858
10.0.14393.5717 — https://support.microsoft.com/help/5022838
6.0.6003.21915 — https://support.microsoft.com/help/5022890
6.0.6003.21915 — https://support.microsoft.com/help/5022893
6.1.7601.26366 — https://support.microsoft.com/help/5022872
6.1.7601.26366 — https://support.microsoft.com/help/5022874
6.2.9200.24116 — https://support.microsoft.com/help/5022903
6.2.9200.24116 — https://support.microsoft.com/help/5022895
6.3.9600.20821 — https://support.microsoft.com/help/5022899
6.3.9600.20821 — https://support.microsoft.com/help/5022894
Vulnerabilities 1
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High 7.4
Windows Distributed File System (DFS) Remote Code Execution Vulnerability
Windows Distributed File System (DFS) Remote Code Execution Vulnerability
Revision history
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#1
Information published.
References
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CVE-2023-21820 Windows Distributed File System (DFS) Remote Code Execution Vulnerability - HTML
https://msrc.microsoft.com/update-guide/vulnerability/CVE-2023-21820
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Microsoft Exploitability Index
https://www.microsoft.com/en-us/msrc/exploitability-index?rtc=1
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Microsoft Support Lifecycle
https://support.microsoft.com/lifecycle
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Common Vulnerability Scoring System
https://www.first.org/cvss