EUVD-2026-72969
GHSA-49x9-m6h4-h7g6
Severity by source
AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Local kernel driver overflow requiring only low-privileged local execution; AC:L as no race condition or unusual pre-requisite is indicated; full C/I/A impact at kernel level.
Primary rating from Vendor (microsoft).
CVSS VectorVendor: microsoft
Lifecycle Timeline
3DescriptionCVE.org
Heap-based buffer overflow in Windows VOLSNAP.SYS allows an authorized attacker to elevate privileges locally.
AnalysisAI
Heap-based buffer overflow in the Windows Volume Shadow Copy driver (VOLSNAP.SYS) enables a locally authenticated attacker to escalate privileges to SYSTEM level. The flaw affects a broad swath of Windows releases - from Windows Server 2012 through Windows Server 2025 and Windows 10/11 across multiple feature-update channels - making it relevant to virtually any unpatched Windows environment. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | The attacker must possess a valid local user account with the ability to execute code on the target Windows system (PR:L). … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The CVSS 7.8 High score (AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H) accurately reflects a well-understood local privilege escalation class: an attacker who has already obtained a foothold on a Windows machine - via phishing, RDP brute force, or lateral movement - can reliably escalate to SYSTEM with no further interaction. … 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 the specific Windows version in use. … Detailed patch versions, workarounds, and compensating controls in full report. |
Recommended ActionAI
Within 24 hours, identify and inventory all Windows Server 2012+ and Windows 10/11 systems across your environment using asset management and endpoint-detection tools; simultaneously, obtain and test the latest Microsoft patch in a development or staging environment to validate for application compatibility and stability. …
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Same weakness CWE-122 – Heap-based Buffer Overflow
View allSame technique Buffer Overflow
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External POC / Exploit Code
Leaving vuln.today