Local information disclosure via out-of-bounds GDI read
Published Sep 8, 2026 · Updated Sep 9, 2026
Out-of-bounds read in Microsoft Windows GDI allows local users to disclose information through an unspecified local interaction. Microsoft identifies the fault as an out-of-bounds read in GDI but has not published the affected function, object type, or malformed input that triggers the read. Exploitation requires no prior privileges but does require user interaction, and the bounded impact is unauthorized disclosure without integrity or availability loss.
Summary
What happened
Out-of-bounds read in Microsoft Windows GDI allows local users to disclose information through an unspecified local interaction. Microsoft identifies the fault as an out-of-bounds read in GDI but has not published the affected function, object type, or malformed input that triggers the read. Exploitation requires no prior privileges but does require user interaction, and the bounded impact is unauthorized disclosure without integrity or availability loss.
The record
- CVE
- CVE-2026-77491
- Published
- Sep 8, 2026
- Updated
- Sep 9, 2026
- Vendor
- Microsoft
- Product
- Windows Server 2019
- Classifications
- CWE-125
- Attack vector
- local
- Privileges
- unauthenticated
Timeline
How it unfolded
- Sep 8, 2026CVE publishedPublication date reported by the CVE source.
- Sep 9, 2026Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
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Is a vulnerable build present?
Compare these published version ranges with your installed build and any vendor patches.
- Affected versionversion=10.0.17763.0 <10.0.17763.9245
What conditions does exploitation require?
What is affected?
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.
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Technologies
Your stack
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Your stack
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