EUVD-2026-56336
GHSA-554j-r866-696x
Severity by source
AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Local attack vector and low-privilege prerequisite match 'authorized attacker elevates privileges locally'; full C/I/A reflects successful escalation to SYSTEM with no scope change across host boundary.
Primary rating from Vendor (microsoft).
CVSS VectorVendor: microsoft
Lifecycle Timeline
3DescriptionCVE.org
Heap-based buffer overflow in Windows Remote Desktop Services allows an authorized attacker to elevate privileges locally.
AnalysisAI
Privilege escalation in Windows Remote Desktop Services stems from a heap-based buffer overflow (CWE-122) that an authorized local attacker can exploit to gain full SYSTEM-level control of the affected host. The vulnerability spans an exceptionally wide range of Microsoft Windows versions - from Windows Server 2012 through Windows 11 26H1 and Windows Server 2025 - making the aggregate patch surface very large across enterprise fleets. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | The attacker must already hold an authenticated local session on the target Windows system with at least low-level privileges - consistent with the description's 'authorized attacker' language and the CVSS PR:L metric. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The CVSS 7.8 score with vector AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H accurately characterizes the risk: an authenticated local user with minimal privileges can reliably escalate to full system compromise under default conditions, with no user interaction required and low attack complexity. … 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 fix is to apply the vendor-released security update via Windows Update, Windows Server Update Services (WSUS), or the Microsoft Update Catalog, as documented at https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-62692. … Detailed patch versions, workarounds, and compensating controls in full report. |
Recommended ActionAI
Within 24 hours, inventory all Windows systems running Remote Desktop Services to establish baseline exposure, focusing on Windows Server 2012-2025 and Windows 11 deployments. …
Sign in for detailed remediation steps and compensating controls.
Threat intelligence, references, and detailed analysis are available after sign-in.
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Same weakness CWE-122 – Heap-based Buffer Overflow
View allSame technique Heap Overflow
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External POC / Exploit Code
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