Summary
Impact: Elevation of Privilege. Microsoft rating: Important. Not known to be exploited — Exploitation Unlikely. 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 that the target system be set up in a specific manner and the attacker to have knowledge of that setup.
What privileges could be gained by an attacker who successfully exploited this vulnerability?
An attacker who successfully exploited this vulnerability could gain ROOT privileges.
Security updates
10.0.11 — https://support.microsoft.com/help/5122106
8.0.30 — https://support.microsoft.com/help/5122104
9.0.19 — https://support.microsoft.com/help/5122105
Vulnerabilities 1
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High 7.8
.NET Elevation of Privilege Vulnerability
Uncaught exception in .NET allows an authorized attacker to elevate privileges locally.
Revision history
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#1
Information published.
References
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CVE-2026-62909 .NET Elevation of Privilege Vulnerability - HTML
https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-62909
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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