Local privilege escalation via buffer over-read
Published Apr 14, 2026 · Updated Apr 14, 2026
Buffer over-read in Microsoft Windows Projected File System allows local users with low privileges to elevate privileges on affected systems. Microsoft identifies the faulty component and out-of-bounds read but has not disclosed the specific routine, buffer, or attacker-controlled input that triggers the read. Exploitation requires local low-privilege access, needs no user interaction, and can compromise the system at the elevated privilege level.
Summary
What happened
Buffer over-read in Microsoft Windows Projected File System allows local users with low privileges to elevate privileges on affected systems. Microsoft identifies the faulty component and out-of-bounds read but has not disclosed the specific routine, buffer, or attacker-controlled input that triggers the read. Exploitation requires local low-privilege access, needs no user interaction, and can compromise the system at the elevated privilege level.
The record
- CVE
- CVE-2026-26184
- Published
- Apr 14, 2026
- Updated
- Apr 14, 2026
- Vendor
- Microsoft
- Product
- Windows Server 2019
- Classifications
- CWE-126, T1068
- Attack vector
- local
- Privileges
- authenticated
Timeline
How it unfolded
- Apr 14, 2026CVE publishedPublication date reported by the CVE source.
- Apr 14, 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 <10.0.17763.8644
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.
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