EUVD-2026-44293
GHSA-h4rm-wc6r-8xw9
Severity by source
AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Local EoP needing an existing low-privileged user (AV:L, PR:L), no interaction, with kernel compromise yielding full C/I/A impact and unchanged scope.
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 Kernel allows an authorized attacker to elevate privileges locally.
AnalysisAI
Local privilege escalation in the Microsoft Windows Kernel allows an authenticated attacker to elevate to SYSTEM by triggering an integer overflow (CWE-190) in a kernel code path. The flaw affects a broad range of supported Windows client and server releases (Windows 10 1607 through Windows 11 26H1, and Windows Server 2012 through Server 2025). …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Exploitation requires the attacker to already possess a local, authenticated foothold on the target: the CVSS vector's PR:L confirms low-but-nonzero privileges (a standard/authenticated user account) are needed, and AV:L confirms local access - there is no network-facing path. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The CVSS 3.1 base score is 7.8 (High) with vector AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H - local attack vector, low complexity, low privileges required, no user interaction, unchanged scope, and full confidentiality/integrity/availability impact. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in. |
| Exploit Scenario | An attacker who has already gained low-privileged code execution on a Windows host - for example via a phishing payload or a compromised standard user account - runs a crafted local program that invokes the vulnerable kernel path with parameters chosen to overflow an integer size calculation, corrupting kernel memory to escalate from a normal user to SYSTEM. With AV:L/AC:L/PR:L/UI:N the attack is reliable and requires no victim interaction, though it presupposes an existing foothold. … |
| Remediation | Apply the Microsoft security update for CVE-2026-58532; Patch available per vendor advisory (Microsoft Security Response Center) - consult https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-58532 for the exact patched build number matching each affected OS release, as the input does not enumerate a single fix version. … Detailed patch versions, workarounds, and compensating controls in full report. |
Recommended ActionAI
Within 24 hours, inventory all Windows 10, 11, and Server (2012-2025) systems in scope and notify system owners of the privilege escalation risk; prioritize critical servers running elevated-privilege services. …
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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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