EUVD-2026-56375
GHSA-r8qq-3hj8-mhpp
Severity by source
AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Local-only exploitation requiring a low-privilege session; AC:L as no special conditions needed; full C/I/A because SYSTEM-level escalation yields complete host compromise.
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 DHCP Client allows an authorized attacker to elevate privileges locally.
AnalysisAI
Stack-based buffer overflow in the Windows DHCP Client service enables a low-privileged local attacker to elevate privileges to SYSTEM level with full confidentiality, integrity, and availability impact. The flaw spans virtually every supported Windows desktop and server release, from Windows Server 2012 through Windows 11 26H1 and Windows Server 2025, making the attack surface extremely broad in any environment where interactive or local logon access is possible. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Exploitation requires a low-privilege authenticated session on the target Windows system (CVSS PR:L, AV:L) - an attacker must have the ability to run code locally, achieved via interactive logon, RDP session, or malware already present on the host. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The CVSS 7.8 score with AV:L/AC:L/PR:L/UI:N correctly characterizes this as a local privilege escalation requiring minimal preconditions beyond an existing low-privilege session. … 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 Microsoft's security update for your specific Windows build as detailed at https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-62755. … Detailed patch versions, workarounds, and compensating controls in full report. |
Recommended ActionAI
Within 24 hours, inventory all Windows Server and Windows 11 systems and prioritize critical infrastructure assets (domain controllers, file servers, messaging systems). …
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External POC / Exploit Code
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