Summary
Impact: Elevation of Privilege. Microsoft rating: Important. Not known to be exploited — Exploitation Less Likely. Customer action: Required.
Details
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 win a race condition.
What privileges could be gained by an attacker who successfully exploited the vulnerability?
An attacker who successfully exploited this vulnerability could execute code in the security context of the “NT AUTHORITY\Network Service” account.
Security updates
10.0.17763.9376 — https://support.microsoft.com/help/5126651
10.0.19044.7807 — https://support.microsoft.com/help/5126657
10.0.20348.5761 — https://support.microsoft.com/help/5126655
10.0.22631.7652 — https://support.microsoft.com/help/5126653
10.0.26100.9711 — https://support.microsoft.com/help/5127648
10.0.26100.33650 — https://support.microsoft.com/help/5126646
10.0.28000.3231 — https://support.microsoft.com/help/5127646
Vulnerabilities 1
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High 7.0
Windows Update Delivery Optimization Elevation of Privilege Vulnerability
Use after free in Windows Update Delivery Optimization allows an authorized attacker to elevate privileges locally.
Revision history
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#2
Updated an acknowledgement. This is an informational change only.
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#1
Information published.
References
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CVE-2026-108465 Windows Update Delivery Optimization Elevation of Privilege Vulnerability - HTML
https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-108465
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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