EUVD-2026-56657
GHSA-rq77-ppj7-934x
Severity by source
AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Local-only attack path with low-privilege account sufficient; full CIA impact from SYSTEM-level execution; no scope change as impact remains within the target OS security boundary.
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
3DescriptionCVE.org
Stack-based buffer overflow in Windows Installer allows an authorized attacker to elevate privileges locally.
AnalysisAI
Stack-based buffer overflow in Windows Installer enables local privilege escalation across a wide range of Microsoft Windows desktop and server editions. An authenticated low-privileged local user can exploit the flaw (CWE-121) to achieve SYSTEM-level code execution, with full confidentiality, integrity, and availability impact on the compromised host. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Exploitation requires an authenticated local session on the target host; the CVSS PR:L metric confirms that a standard low-privileged account - not an administrator - is sufficient to trigger the vulnerable Windows Installer code path. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The CVSS 3.1 score of 7.8 with vector AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H accurately captures the threat profile: once an attacker holds any low-privileged local account, exploitation is straightforward with no user interaction required. … 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 | Apply the Microsoft security update for CVE-2026-62768, delivered via Windows Update, WSUS, or the Microsoft Update Catalog. … Detailed patch versions, workarounds, and compensating controls in full report. |
Recommended ActionAI
Within 24 hours, identify and inventory all Windows 10, 11, and Server 2012-2025 systems in your environment and prioritize patching for domain-joined machines and systems accessing sensitive data. …
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External POC / Exploit Code
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