Local privilege escalation via UDFS heap overflow
Published Sep 8, 2026 · Updated Sep 9, 2026
Heap-based buffer overflow in Microsoft's Windows UDFS driver allows local users with low privileges to elevate privileges on affected systems. Microsoft identifies the locus as the UDFS driver but has not disclosed the specific routine or bounds error that corrupts heap memory. Exploitation requires existing low-privilege local access and no user interaction; successful exploitation grants elevated privileges.
Summary
What happened
Heap-based buffer overflow in Microsoft's Windows UDFS driver allows local users with low privileges to elevate privileges on affected systems. Microsoft identifies the locus as the UDFS driver but has not disclosed the specific routine or bounds error that corrupts heap memory. Exploitation requires existing low-privilege local access and no user interaction; successful exploitation grants elevated privileges.
The record
- CVE
- CVE-2026-69758
- Published
- Sep 8, 2026
- Updated
- Sep 9, 2026
- Vendor
- Microsoft
- Product
- Windows Server 2019
- Classifications
- CWE-122, T1068
- Attack vector
- local
- Privileges
- authenticated
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
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 <10.0.17763.9245
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.
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