MSRC-CVE-2026-57088 — Extensible Storage Engine (ESENT) Elevation of Privilege Vulnerability

Summary

Impact: Elevation of Privilege. Microsoft rating: Important. Not known to be exploited — Exploitation Less Likely. Customer action: Required.

Details

What privileges could be gained by an attacker who successfully exploited this vulnerability?
An attacker who successfully exploited this vulnerability could gain ELEVATED privileges, which may allow them to perform actions beyond their original permissions.

Security updates
10.0.17763.9020 — https://support.microsoft.com/help/5099538
10.0.20348.5386 — https://support.microsoft.com/help/5099540
10.0.26100.33158 — https://support.microsoft.com/help/5099536

Vulnerabilities 1

High 7.8

CVE-2026-57088

Extensible Storage Engine (ESENT) Elevation of Privilege Vulnerability

Improper access control in Extensible Storage Engine (ESENT) allows an authorized attacker to elevate privileges locally.

Microsoft Windows Server 2019 Windows Server 2019 (Server Core installation) Windows 10 Version 1809 Windows

Jul 14, 2026

Revision history

2026-07-14 #1
Information published.

References

CVE-2026-57088 Extensible Storage Engine (ESENT) Elevation of Privilege Vulnerability - HTML
https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-57088
Microsoft Exploitability Index
https://www.microsoft.com/en-us/msrc/exploitability-index?rtc=1
Microsoft Support Lifecycle
https://support.microsoft.com/lifecycle
Common Vulnerability Scoring System
https://www.first.org/cvss