EUVD-2026-44133
GHSA-9q4m-9fw8-gjgv
Severity by source
AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Requires an existing low-privileged local foothold (AV:L, PR:L) with no user interaction and low complexity, yielding full SYSTEM-level compromise (C/I/A:H) without scope change.
Primary rating from Vendor (microsoft).
CVSS VectorVendor: microsoft
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Lifecycle Timeline
2DescriptionCVE.org
Integer overflow or wraparound in Windows Active Directory allows an authorized attacker to elevate privileges locally.
AnalysisAI
Local privilege escalation in Windows Active Directory across a broad range of Windows client and server releases (Windows 10 1607 through Windows 11 26H1, and Windows Server 2012 through 2025) allows an authenticated local attacker to elevate privileges by triggering an integer overflow (CWE-190). Successful exploitation yields high confidentiality, integrity, and availability impact, effectively enabling escalation to SYSTEM-level control on the affected host. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Exploitation requires the attacker to already hold a low-privileged authenticated account with the ability to execute code locally on an affected Windows system (per PR:L and AV:L), and to reach the vulnerable Active Directory code path that performs the flawed size/length calculation. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The CVSS 3.1 vector (AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H, base 7.8) describes a locally exploitable, low-complexity flaw requiring only low existing privileges and no user interaction, with full CIA impact but no scope change - a classic elevation-of-privilege primitive rather than a remote intrusion vector. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in. |
| Exploit Scenario | An attacker who has already gained a low-privileged authenticated foothold on a Windows host - for example through phishing, a compromised service account, or an initial-access exploit - invokes the vulnerable Active Directory code path with crafted input that triggers the integer overflow. The resulting memory corruption is leveraged to execute code at elevated privilege, giving the attacker full control of the machine. … |
| Remediation | Patch available per vendor advisory: apply the Microsoft security update referenced at https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-54115, selecting the KB corresponding to each affected Windows 10/11 or Windows Server 2012-2025 build (including Server Core installations). … Detailed patch versions, workarounds, and compensating controls in full report. |
Recommended ActionAI
Within 24 hours, identify all Windows systems running Windows 10 (versions 1607 through 26H1), Windows 11, or Windows Server (2012 through 2025) and confirm patch availability from Microsoft MSRC. …
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Same weakness CWE-190 – Integer Overflow or Wraparound
View allSame technique Buffer Overflow
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External POC / Exploit Code
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