Severity by source
AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Local privilege escalation by an authenticated low-privileged user (AV:L, PR:L) with no user interaction and full SYSTEM-level compromise of C/I/A, matching the reported vector.
Primary rating from Vendor (microsoft).
CVSS VectorNVD
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Lifecycle Timeline
2DescriptionNVD
Improper access control in Extensible Storage Engine (ESENT) allows an authorized attacker to elevate privileges locally.
AnalysisAI
Local privilege elevation in the Windows Extensible Storage Engine (ESENT) database library allows an already-authenticated low-privileged user on affected Windows 10 1809, Windows Server 2019, 2022, and 2025 systems to gain higher privileges, with full loss of confidentiality, integrity, and availability. The flaw stems from improper access control (CWE-284) in a core OS component that services many system databases. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Exploitation requires the attacker to already be an authenticated local user on the affected host (CVSS PR:L), execute code locally against the ESENT engine (AV:L), and needs no user interaction (UI:N) and no elevated privileges to start. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The CVSS 3.1 base score of 7.8 (AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H) describes a locally-exploitable flaw requiring low privileges and no user interaction, delivering high impact across all three security properties - a classic privilege-escalation profile useful as the second stage of an intrusion after initial foothold. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in. |
| Exploit Scenario | An attacker who has already obtained a low-privileged foothold on a Windows Server 2022 host - for example a standard user account or a compromised service account - runs a crafted program that abuses ESENT's improper access control to elevate to SYSTEM. From there the attacker installs persistence, dumps credentials, and moves laterally. … |
| Remediation | Patch available per vendor advisory: apply the Microsoft security update for your specific Windows SKU as documented at https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-57088 - the exact fixed build/KB number is listed per product in that MSRC guide (not enumerated in the supplied data, so consult the advisory for your OS version). … Detailed patch versions, workarounds, and compensating controls in full report. |
Recommended ActionAI
Within 24 hours, conduct an inventory of all systems running Windows Server 2019, Windows Server 2022, Windows Server 2025, or Windows 10 version 1809. …
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Same weakness CWE-284 – Improper Access Control
View allSame technique Authentication Bypass
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External POC / Exploit Code
Leaving vuln.today
EUVD-2026-44273
GHSA-gqp7-j73x-j9wc