EUVD-2026-72970
GHSA-g5pp-p6fm-7p7j
Severity by source
AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Local heap overflow in default-enabled WER component; standard user sufficient, no interaction or special config needed; SYSTEM-level execution yields full C/I/A.
Primary rating from Vendor (microsoft).
CVSS VectorVendor: microsoft
Lifecycle Timeline
3DescriptionCVE.org
Heap-based buffer overflow in Windows Error Reporting allows an authorized attacker to elevate privileges locally.
AnalysisAI
Privilege escalation in Windows Error Reporting (WER) via a heap-based buffer overflow (CWE-122) allows an authenticated local attacker - holding only standard user privileges - to achieve full system compromise across all current Windows 10, Windows 11, and Windows Server 2019/2022/2025 builds. The CVSS 7.8 vector (AV:L/AC:L/PR:L/UI:N) reflects low attack complexity and no interaction requirement, making this an effective land-and-escalate primitive for threat actors with any initial foothold on a target host. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | The attacker must hold an authenticated local session on the target Windows system with at minimum standard (non-administrator) user privileges, consistent with the CVSS PR:L metric. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The CVSS 7.8 score is well-calibrated for this class of local privilege escalation: AC:L confirms no timing dependency or special environmental race condition is needed, PR:L means any standard domain or local user account can attempt exploitation, and the full C:H/I:H/A:H triad reflects SYSTEM-level access upon successful heap corruption. … 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 vendor-released patches via Windows Update, WSUS, or Microsoft Update Catalog targeting the fixed build numbers for each affected platform: Windows Server 2025 and Windows 11 24H2 to 10.0.26100.33438 or later (server) / 10.0.26100.9445 or later (client), Windows 11 26H1 to 10.0.28000.2954 or later, Windows 11 25H2 to 10.0.26200.9445 or later, Windows 11 23H2 to 10.0.22631.7582 or later, Windows Server 2022 to 10.0.20348.5622 or later, Windows Server 2019 and Windows 10 1809 to 10.0.17763.9245 or later, and Windows 10 21H2/22H2 to 10.0.19044.7725 or 10.0.19045.7725 or later. … Detailed patch versions, workarounds, and compensating controls in full report. |
Recommended ActionAI
Within 24 hours, conduct a complete inventory of your Windows 10, Windows 11, Windows Server 2019, Windows Server 2022, and Windows Server 2025 infrastructure and identify systems that have not applied the latest Microsoft security patch for Windows Error Reporting. …
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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
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