Summary
Impact: Remote Code Execution. Microsoft rating: Critical. Not known to be exploited — Exploitation More Likely. Customer action: Required.
Details
How could an attacker exploit this vulnerability?
An unauthenticated attacker could exploit this vulnerability by sending a specially crafted packet to an affected service over the network. Successful exploitation could allow the attacker to execute code on the target system. No authentication or user interaction is required.
Security updates
10.0.17763.9121 — https://support.microsoft.com/help/5120238
10.0.20348.5499 — https://support.microsoft.com/help/5120242
10.0.20348.5440 — https://support.microsoft.com/help/5120229
10.0.26100.33296 — https://support.microsoft.com/help/5120233
10.0.26100.33222 — https://support.microsoft.com/help/5120228
10.0.14393.9418 — https://support.microsoft.com/help/5120418
6.2.9200.26280 — https://support.microsoft.com/help/5120386
6.3.9600.23338 — https://support.microsoft.com/help/5120385
Vulnerabilities 1
-
Critical 9.8
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.
Revision history
-
#2
Updated software table to remove clients versions because this vulnerability only impacts Windows Servers. This is an informational change only.
-
#1
Information published.
References
-
CVE-2026-62893 Windows Deployment Services TFTP Server Remote Code Execution Vulnerability - HTML
https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-62893
-
Microsoft Exploitability Index
https://www.microsoft.com/en-us/msrc/exploitability-index?rtc=1
-
Microsoft Support Lifecycle
https://support.microsoft.com/lifecycle
-
Common Vulnerability Scoring System
https://www.first.org/cvss