MSRC compact vulnerability detail

CVE-2026-20806 · Windows COM Server Information Disclosure Vulnerability

Access of resource using incompatible type ('type confusion') in Windows COM allows an authorized attacker to disclose information locally.

Severity
Important
Impact
Information Disclosure
CVSS
5.5 base · 4.8 temporal
Release
2026-04-14
Signals
Windows COM Information Disclosure Exploited: No Publicly disclosed: No Exploitability: Exploitation Unlikely
CWE
Patch Diff
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Resolved binary override
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Description
Access of resource using incompatible type ('type confusion') in Windows COM allows an authorized attacker to disclose information locally.
FAQ / Articles
Windows COM Information Disclosure Vulnerability
Access of resource using incompatible type ('type confusion') in Windows COM allows an authorized attacker to disclose information locally.
FAQ
What type of information could be disclosed by this vulnerability? An attacker who successfully exploited the vulnerability could potentially read User Mode Service Memory.