CVEs / CVE-2020-0638
CVE-2020-0638: Microsoft Update Notification Manager Privilege Escalation Vulnerability
- Known exploited in the CISA KEV catalog since 23 May 2022
- high 7.8 CVSS 3.1 (NVD)
- EPSS 2.37% chance of exploitation in the next 30 days, higher than 83% of CVEs (30 Oct 2026)
- Last changed at its sources
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Summary
Microsoft Update Notification Manager contains an unspecified vulnerability that allows for privilege escalation.
Description
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'.
Affected and fixed versions
| Product | Affected | Fixed in |
|---|---|---|
| Microsoft Windows | 10 Version 1709 for 32-bit Systems | — |
| Microsoft Windows | 10 Version 1803 for 32-bit Systems | — |
| Microsoft Windows | 10 Version 1809 for ARM64-based Systems | — |
| Microsoft Windows | 10 Version 1803 for x64-based Systems | — |
| Microsoft Windows | 10 Version 1709 for ARM64-based Systems | — |
| Microsoft Windows | 10 Version 1709 for x64-based Systems | — |
| Microsoft Windows | 10 Version 1803 for ARM64-based Systems | — |
| Microsoft Windows | 10 Version 1809 for 32-bit Systems | — |
| Microsoft Windows | 10 Version 1809 for x64-based Systems | — |
| Microsoft Windows 10 Version 1903 for ARM64-based Systems | unspecified | — |
| Microsoft Windows 10 Version 1903 for 32-bit Systems | unspecified | — |
| Microsoft Windows 10 Version 1903 for x64-based Systems | unspecified | — |
| Microsoft Windows Server | 2019 | — |
| Microsoft Windows Server | 2019 (Core installation) | — |
| Microsoft Windows Server | version 1803 (Core Installation) | — |
| Microsoft Windows Server, version 1903 (Server Core installation) | unspecified | — |
| Microsoft Windows 10 Version 1909 for 32-bit Systems | unspecified | — |
| Microsoft Windows 10 Version 1909 for x64-based Systems | unspecified | — |
| Microsoft Windows Server, version 1909 (Server Core installation) | unspecified | — |
| Microsoft Windows 10 Version 1909 for ARM64-based Systems | unspecified | — |
Exploitation
| In CISA KEV since | 23 May 2022 |
|---|---|
| Due date for US federal agencies | 13 Jun 2022 |
| Used in ransomware campaigns | Known |
| Required action | Apply updates per vendor instructions. |
Severity
| CVSS 3.1 | 7.8 highCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:HScored by NVD |
|---|---|
| Weakness | CWE-59 |
References
- CVE-2020-0638 on NVD
- CVE-2020-0638 in the CISA KEV catalog
- https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2020-0638 Patch, Vendor Advisory
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2020-0638 US Government Resource
Sources
Exploitation status from the CISA Known Exploited Vulnerabilities catalog. EPSS scores from FIRST. Descriptions, severity and references from the National Vulnerability Database. Open-source package versions from OSV (CC-BY 4.0). Text is shown as each source states it; Stackurity does not edit it. Check the vendor's advisory before acting.
This product uses data from the NVD API but is not endorsed or certified by the NVD.