CVE-2020-0638An elevation of privilege vulnerability exists in the way the Update Notification Manager handles files.To exploit this vulnerability, an attacker would first have to gain execution on the victim sys…
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It affects Microsoft Windows and 18 other products. Add what you run to find out whether that includes you.
CISA lists it as known exploited since May 23, 2022; federal agencies had to remediate by Jun 13, 2022, and it is known to be used in ransomware. Treat that date as your deadline.
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An elevation of privilege vulnerability exists in the way the Update Notification Manager handles files.To exploit this vulnerability, an attacker would first have to gain execution on the victim system, aka 'Update Notification Manager Elevation of Privilege Vulnerability'.
- CVSS
- 7.8 HIGH (v3.1, CISA ADP)CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
- Weakness (CWE)
- CWE-59
- Known exploited
- Added to CISA KEV May 23, 2022; federal remediation due Jun 13, 2022; known ransomware useApply updates per vendor instructions.
- EPSS (exploitation in the next 30 days)
- 2.37% (percentile 84)
- Assigned by
- microsoft
- NVD analysis
- Analyzed
- Record last updated
- Aug 12, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
Microsoft Windows microsoft:windows (from the name) | 10 Version 1709 for 32-bit Systems; 10 Version 1803 for 32-bit Systems; 10 Version 1809 for ARM64-based Systems; 10 Version 1803 for x64-based Systems; 10 Version 1709 for ARM64-based Systems; 10 Version 1709 for x64-based Systems; 10 Version 1803 for ARM64-based Systems; 10 Version 1809 for 32-bit Systems; and 1 more ranges | CNA record |
Microsoft Windows 10 Version 1903 for ARM64-based Systems microsoft:windows_10_version_1903_for_arm64_based_systems (from the name) | unspecified | CNA record |
Microsoft Windows 10 Version 1903 for 32-bit Systems microsoft:windows_10_version_1903_for_32_bit_systems (from the name) | unspecified | CNA record |
Microsoft Windows 10 Version 1903 for x64-based Systems microsoft:windows_10_version_1903_for_x64_based_systems (from the name) | unspecified | CNA record |
Microsoft Windows Server microsoft:windows_server (from the name) | 2019; 2019 (Core installation); version 1803 (Core Installation) | CNA record |
Microsoft Windows Server, version 1903 (Server Core installation) microsoft:windows_server_version_1903_server_core_installation (from the name) | unspecified | CNA record |
Microsoft Windows 10 Version 1909 for 32-bit Systems microsoft:windows_10_version_1909_for_32_bit_systems (from the name) | unspecified | CNA record |
Microsoft Windows 10 Version 1909 for x64-based Systems microsoft:windows_10_version_1909_for_x64_based_systems (from the name) | unspecified | CNA record |
Microsoft Windows Server, version 1909 (Server Core installation) microsoft:windows_server_version_1909_server_core_installation (from the name) | unspecified | CNA record |
Microsoft Windows 10 Version 1909 for ARM64-based Systems microsoft:windows_10_version_1909_for_arm64_based_systems (from the name) | unspecified | CNA record |
microsoft windows_10_1709 microsoft:windows_10_1709 | all versions; all versions | NVD |
microsoft windows_10_1803 microsoft:windows_10_1803 | all versions; all versions | NVD |
microsoft windows_10_1809 microsoft:windows_10_1809 | all versions; all versions; all versions | NVD |
microsoft windows_10_1903 microsoft:windows_10_1903 | all versions; all versions; all versions | NVD |
microsoft windows_10_1909 microsoft:windows_10_1909 | all versions; all versions; all versions | NVD |
microsoft windows_server_1803 microsoft:windows_server_1803 | all versions | NVD |
microsoft windows_server_1903 microsoft:windows_server_1903 | all versions | NVD |
microsoft windows_server_1909 microsoft:windows_server_1909 | all versions | NVD |
microsoft windows_server_2019 microsoft:windows_server_2019 | all versions | NVD |
References
- https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2020-0638x-refsource-misc, patch, vendor-advisory
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2020-0638us-government-resource
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.