EUVD-2026-56308
GHSA-m4p5-298m-jcjf
Severity by source
AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Local-only attack vector with low-privilege user account sufficient; no interaction needed; full SYSTEM compromise yields high C/I/A with no scope change.
Primary rating from Vendor (microsoft).
CVSS VectorVendor: microsoft
Lifecycle Timeline
3DescriptionCVE.org
Integer overflow or wraparound in Windows Installer allows an authorized attacker to elevate privileges locally.
AnalysisAI
Privilege escalation in Windows Installer exposes virtually every supported Windows release to local elevation-of-privilege via an integer overflow (CWE-190) in the msiexec/installer subsystem. Any low-privileged local user can trigger the flaw to gain SYSTEM-level control, with full confidentiality, integrity, and availability impact confirmed by the CVSS:3.1 AV:L/PR:L/C:H/I:H/A:H vector. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | The attacker must have a valid low-privileged local user account on the target Windows system (CVSS PR:L confirmed). … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The CVSS 7.8 High score is well-calibrated to the actual risk posture. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in. |
| Exploit Scenario | Full exploit scenario with step-by-step reproduction available after sign-in. |
| Remediation | The primary remediation is applying the vendor-released patch via Windows Update or WSUS. … Detailed patch versions, workarounds, and compensating controls in full report. |
Recommended ActionAI
Within 24 hours, conduct a complete inventory of Windows systems and assess patch status across your organization. …
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Same weakness CWE-190 – Integer Overflow or Wraparound
View allSame technique Integer Overflow
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External POC / Exploit Code
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