CVE-2026-95947
Windows Error Reporting Elevation of Privilege Vulnerability
An elevation of privilege vulnerability exists in Windows Error Reporting (WER) when WER handles and executes files. The vulnerability could allow elevation of privilege if an attacker can successfully exploit it. An attacker who successfully exploited the vulnerability could gain greater access to sensitive information and system functionality. To exploit the vulnerability, an attacker could run a specially crafted application. The security update addresses the vulnerability by correcting the way that WER handles and executes files.
Fixes and workarounds
Fix
The reporting source identifies this reference as a patch. Check the advisory for affected versions and supported release branches.
Source: CNA: microsoftAffected products and versions
| Product | Versions | Authority |
|---|---|---|
| Windows 10 Version 1607 Microsoft Platforms: 32-bit Systems, x64-based Systems |
≥ 10.0.14393.0; < 10.0.14393.9688 (affected, custom) | CNA: microsoft |
| Windows 10 Version 1809 Microsoft Platforms: 32-bit Systems, x64-based Systems |
≥ 10.0.17763.0; < 10.0.17763.9487 (affected, custom) | CNA: microsoft |
| Windows 10 Version 21H2 Microsoft Platforms: 32-bit Systems, ARM64-based Systems, x64-based Systems |
≥ 10.0.19044.0; < 10.0.19044.7846 (affected, custom) | CNA: microsoft |
| Windows 10 Version 22H2 Microsoft Platforms: 32-bit Systems, ARM64-based Systems, x64-based Systems |
≥ 10.0.19045.0; < 10.0.19045.7846 (affected, custom) | CNA: microsoft |
| Windows 11 version 23H2 Microsoft Platforms: ARM64-based Systems |
≥ 10.0.22631.0; < 10.0.22631.7711 (affected, custom) | CNA: microsoft |
| Windows 11 Version 23H2 Microsoft Platforms: x64-based Systems |
≥ 10.0.22631.0; < 10.0.22631.7711 (affected, custom) | CNA: microsoft |
| Windows 11 Version 24H2 Microsoft Platforms: ARM64-based Systems, x64-based Systems |
≥ 10.0.26100.0; < 10.0.26100.9974 (affected, custom) | CNA: microsoft |
| Windows 11 Version 25H2 Microsoft Platforms: ARM64-based Systems, x64-based Systems |
≥ 10.0.26200.0; < 10.0.26200.9974 (affected, custom) | CNA: microsoft |
| Windows 11 version 26H1 Microsoft Platforms: ARM64-based Systems, x64-based Systems |
≥ 10.0.28000.0; < 10.0.28000.3501 (affected, custom) | CNA: microsoft |
| Windows 11 Version 26H2 Microsoft Platforms: ARM64-based Systems, x64-based Systems |
≥ 10.0.26300.0; < 10.0.26300.9974 (affected, custom) | CNA: microsoft |
| Windows Server 2016 Microsoft Platforms: x64-based Systems |
≥ 10.0.14393.0; < 10.0.14393.9688 (affected, custom) | CNA: microsoft |
| Windows Server 2016 (Server Core installation) Microsoft Platforms: x64-based Systems |
≥ 10.0.14393.0; < 10.0.14393.9688 (affected, custom) | CNA: microsoft |
| Windows Server 2019 Microsoft Platforms: x64-based Systems |
≥ 10.0.17763.0; < 10.0.17763.9487 (affected, custom) | CNA: microsoft |
| Windows Server 2019 (Server Core installation) Microsoft Platforms: x64-based Systems |
≥ 10.0.17763.0; < 10.0.17763.9487 (affected, custom) | CNA: microsoft |
| Windows Server 2022 Microsoft Platforms: x64-based Systems |
≥ 10.0.20348.0; < 10.0.20348.5870 (affected, custom) | CNA: microsoft |
| Windows Server 2025 Microsoft Platforms: x64-based Systems |
≥ 10.0.26100.0; < 10.0.26100.33822 (affected, custom) | CNA: microsoft |
| Windows Server 2025 (Server Core installation) Microsoft Platforms: x64-based Systems |
≥ 10.0.26100.0; < 10.0.26100.33822 (affected, custom) | CNA: microsoft |
Version ranges are source assertions. Check the vendor advisory and your installed configuration before determining exposure.
CVSS assessments
| Version / score | Vector | Authority |
|---|---|---|
| 3.1 / 7.8 high |
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C | CNA: microsoft |
| 3.1 / 7.8 high |
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H | NVD: [email protected] |
Exploit evidence
No exploit evidence in collected sources. This is not proof of no exploitation.
References
- https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-95947CNA: microsoft · vendor-advisory, patch
- https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-95947[email protected]
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