Local section-address disclosure via undisclosed DWM flaw
Published Jan 13, 2026 · Updated Jan 13, 2026
Information disclosure in Microsoft Windows Desktop Window Manager allows local users to read a section address from a remote ALPC port. Microsoft has not disclosed the code path or faulty operation that returns this user-mode memory address. Low-privileged local access is required, and the disclosed address can expose user-mode memory layout information.
Summary
What happened
Information disclosure in Microsoft Windows Desktop Window Manager allows local users to read a section address from a remote ALPC port. Microsoft has not disclosed the code path or faulty operation that returns this user-mode memory address. Low-privileged local access is required, and the disclosed address can expose user-mode memory layout information.
The record
- CVE
- CVE-2026-20805
- Published
- Jan 13, 2026
- Updated
- Jan 13, 2026
- Vendor
- Microsoft
- Product
- Windows Server 2019
- Classifications
- CWE-200
- Attack vector
- local
- Privileges
- authenticated
Timeline
How it unfolded
- Jan 13, 2026CVE publishedPublication date reported by the CVE source.
- Jan 13, 2026Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
Compare your product and version with the public record. A matching version still requires validation against your environment.
Is a vulnerable build present?
Compare these published version ranges with your installed build and any vendor patches.
- Affected versionversion=10.0.17763.0 <10.0.17763.8276
What conditions does exploitation require?
What is affected?
Published CVSS scores
CVSS describes severity. EPSS estimates exploitation probability.
Attacks
What attackers are doing with it
Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.
Weakness, pattern, technique
Public exploit references
No public exploit references are available in this record.
Labels summarize the accepted research assessment. They do not indicate a test against your environment.
Reported exploitation
- Microsoft Windows Information Disclosure Vulnerability in CISA KEVknown exploited catalog
Technologies
Your stack
See the directory against your own environment.
Your stack
Check the software in your environment
Book a demo to see how Hinoki identifies affected software and validates exploitability in your environment.
Book a demo