EUVD-2026-56374
GHSA-5fmj-6x8v-3p2w
Severity by source
AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Local attack via RASMAN requiring only a low-privilege user account; no interaction needed; full triad compromise reflects SYSTEM-level escalation from a standard service process.
Primary rating from Vendor (microsoft).
CVSS VectorVendor: microsoft
Lifecycle Timeline
3DescriptionCVE.org
Heap-based buffer overflow in Windows Remote Access Connection Manager allows an authorized attacker to elevate privileges locally.
AnalysisAI
Privilege escalation in the Windows Remote Access Connection Manager (RASMAN) service enables a low-privileged local attacker to achieve SYSTEM-level access through a heap-based buffer overflow. Affecting Windows 10 (from version 1809), Windows 11 (through version 26H1), Windows Server 2019 through Server 2025, this vulnerability requires only a valid local user account and no user interaction. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Exploitation requires a valid low-privileged local user account on the target system - the CVSS PR:L metric confirms that non-administrator credentials are sufficient; no administrative rights are needed to trigger the overflow. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The CVSS 7.8 (High) score accurately represents the real-world risk profile: local attack vector (AV:L) caps the network exposure, but low attack complexity (AC:L) and low privilege requirement (PR:L) mean any local user account - including those obtained through phishing or credential reuse - is sufficient to trigger full system compromise (C:H/I:H/A:H). … 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 vendor-released security updates via Windows Update or WSUS immediately. … Detailed patch versions, workarounds, and compensating controls in full report. |
Recommended ActionAI
Within 24 hours, identify and catalog all Windows 10 (version 1809 and later), Windows 11 (through version 26H1), and Windows Server 2019-2025 systems in your environment to establish exposure baseline. …
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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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