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9.8

CVE-2026-62893: Windows Deployment Services TFTP Server Code Execution Risk

CVE-2026-62893 · published 23 days ago
Summary

An attacker can execute malicious code on a Windows Deployment Services server, potentially taking control of the server. This could allow the attacker to access sensitive information or disrupt services. To protect your network, ensure Windows Deployment Services is not exposed to the internet and apply any available security updates.

What to do
  • Update microsoft windows 10 version 1607 to version 10.0.14393.9418 or later.
  • Update microsoft windows server 2016 to version 10.0.14393.9418 or later.
  • Update microsoft windows server 2016 (server core installation) to version 10.0.14393.9418 or later.
  • Update microsoft windows server 2022 to version 10.0.20348.5499 or later.
  • Update microsoft windows server 2025 to version 10.0.26100.33296 or later.
  • Update microsoft windows server 2025 (server core installation) to version 10.0.26100.33296 or later.
  • Update microsoft windows_10_1607 to version 10.0.14393.9418 or later.
  • Update microsoft windows_10_1809 to version 10.0.17763.9115 or later.
  • Update microsoft windows_server_2016 to version 10.0.14393.9418 or later.
  • Update microsoft windows_server_2019 to version 10.0.17763.9115 or later.
  • Update microsoft windows_server_2022 to version 10.0.20348.5440 or later.
  • Update microsoft windows_server_2025 to version 10.0.26100.33222 or later.
Affected software
VendorProductAffected versions
microsoft windows 10 version 1607 < 10.0.14393.9418
microsoft windows 10 version 1809 < 10.0.17763.9115
< 10.0.17763.9121
microsoft windows server 2012 < 6.2.9200.26279
< 6.2.9200.26280
microsoft windows server 2012 (server core installation) < 6.2.9200.26279
< 6.2.9200.26280
microsoft windows server 2012 r2 < 6.3.9600.23337
< 6.3.9600.23338
microsoft windows server 2012 r2 (server core installation) < 6.3.9600.23337
< 6.3.9600.23338
microsoft windows server 2016 < 10.0.14393.9418
microsoft windows server 2016 (server core installation) < 10.0.14393.9418
microsoft windows server 2019 < 10.0.17763.9115
< 10.0.17763.9121
microsoft windows server 2019 (server core installation) < 10.0.17763.9115
< 10.0.17763.9121
microsoft windows server 2022 < 10.0.20348.5499
microsoft windows server 2025 < 10.0.26100.33296
microsoft windows server 2025 (server core installation) < 10.0.26100.33296
microsoft windows_10_1607 < 10.0.14393.9418
cpe:2.3:o:microsoft:windows_10_1607:*:*:*:*:*:*:x64:*
microsoft windows_10_1809 < 10.0.17763.9115
cpe:2.3:o:microsoft:windows_10_1809:*:*:*:*:*:*:x64:*
microsoft windows_server_2012 r2
cpe:2.3:o:microsoft:windows_server_2012:-:*:*:*:*:*:*:*
microsoft windows_server_2016 < 10.0.14393.9418
cpe:2.3:o:microsoft:windows_server_2016:*:*:*:*:*:*:*:*
microsoft windows_server_2019 < 10.0.17763.9115
cpe:2.3:o:microsoft:windows_server_2019:*:*:*:*:*:*:*:*
microsoft windows_server_2022 < 10.0.20348.5440
cpe:2.3:o:microsoft:windows_server_2022:*:*:*:*:*:*:*:*
microsoft windows_server_2025 < 10.0.26100.33222
cpe:2.3:o:microsoft:windows_server_2025:*:*:*:*:*:*:x64:*
Original advisory text
Windows Deployment Services TFTP Server Remote Code Execution Vulnerability
Use after free in Windows Deployment Services allows an unauthorized attacker to execute code over a network.
Severity
9.8 Critical
CVSS 3.1: 9.8 (MITRE)
Exploitation
EPSS 3%
Type
CWE-416Use After Free
Timeline
Published11 Aug 2026
Updated2 Sep 2026
First seen11 Aug 2026
Sources
CVE-2026-62893 · MITRE
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