Summary
Impact: Denial of Service. Microsoft rating: Important. Not known to be exploited — Exploitation Less Likely. Customer action: Required.
Details
According to the CVSS metrics, user interaction is required (UI:R) and privileges required is low (PR:L). What does that mean for this vulnerability?
An authenticated attacker would need to perform specific actions on a vulnerable system, then convince another user on that system to interact with the Windows Deployment Services functionality.
According to the CVSS metric, the attack complexity is high (AC:H). What does that mean for this vulnerability?
Successful exploitation of this vulnerability requires an attacker to prepare the target environment to improve exploit reliability.
According to the CVSS metrics, successful exploitation of this vulnerability could lead to no loss of confidentiality (C:N), but could lead to major loss on integrity (I:H) and availability (A:H). What does that mean for this vulnerability?
An attacker who successfully exploits this vulnerability cannot access files but can overwrite their contents and potentially cause the service to become unavailable.
Security updates
10.0.17763.6893 — https://support.microsoft.com/help/5052000
10.0.20348.3207 — https://support.microsoft.com/help/5051979
10.0.20348.3148 — https://support.microsoft.com/help/5052106
10.0.19044.5487 — https://support.microsoft.com/help/5051974
10.0.22621.4890 — https://support.microsoft.com/help/5051989
10.0.26100.3194 — https://support.microsoft.com/help/5051987
10.0.26100.3107 — https://support.microsoft.com/help/5052105
10.0.25398.1425 — https://support.microsoft.com/help/5051980
10.0.10240.20915 — https://support.microsoft.com/help/5052040
10.0.14393.7785 — https://support.microsoft.com/help/5052006
6.2.9200.25317 — https://support.microsoft.com/help/5052020
6.3.9600.22417 — https://support.microsoft.com/help/5052042
Vulnerabilities 1
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Medium 6.0
Windows Deployment Services Denial of Service Vulnerability
Windows Deployment Services Denial of Service Vulnerability
Revision history
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#1
Information published.
References
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CVE-2025-21347 Windows Deployment Services Denial of Service Vulnerability - HTML
https://msrc.microsoft.com/update-guide/vulnerability/CVE-2025-21347
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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