EUVD-2026-56436
GHSA-mj96-gpjc-hg8j
Severity by source
AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Local-only attack vector with no configuration prerequisites; low-privilege authenticated session sufficient; full system compromise achievable post-exploit.
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
Heap-based buffer overflow in Windows Remote Access API allows an authorized attacker to elevate privileges locally.
AnalysisAI
Privilege escalation in the Windows Remote Access API via a heap-based buffer overflow (CWE-122) allows an authenticated local attacker with low privileges to gain full SYSTEM-level control over affected Windows 11 and Windows Server 2022/2025 hosts. The CVSS vector (AV:L/AC:L/PR:L/UI:N) confirms exploitation requires only a valid local account and no user interaction, making it a reliable post-compromise escalation path. …
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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 with at minimum standard (low-privilege) user rights, as confirmed by the CVSS vector PR:L. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The CVSS 3.1 score of 7.8 reflects a high-severity local privilege escalation with low attack complexity, making it a reliable escalation primitive for any attacker who has already obtained local access to an affected host. … 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 Microsoft security update that advances affected builds to or beyond their respective fix thresholds: Windows 11 23H2 to build 10.0.22631.7517 or later, Windows 11 24H2 to 10.0.26100.9168 or later, Windows 11 25H2 to 10.0.26200.9168 or later, Windows 11 26H1 to 10.0.28000.2704 or later, Windows Server 2025 (including Server Core) to 10.0.26100.33296 or later, and Windows Server 2022 to 10.0.20348.5499 or later. … Detailed patch versions, workarounds, and compensating controls in full report. |
Recommended ActionAI
Within 24 hours, create an inventory of all Windows 11, Server 2022, and Server 2025 systems in your environment and segment them by criticality tier (domain controllers, data repositories, and production systems first). …
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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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