What’s Vulnerable › Vulnerabilities
CVE-2020-1116: Windows CSRSS Information Disclosure Vulnerability
- Severity: medium (CVSS 5.5 v3.1)
- Exploited in the wild: not listed in CISA KEV
- EPSS: 1.3% probability of exploitation in the next 30 days
- Public exploit or detection template: none known
- Published: 2020-05-21 · updated 2026-08-19
Description
An information disclosure vulnerability exists when the Windows Client Server Run-Time Subsystem (CSRSS) fails to properly handle objects in memory. An attacker who successfully exploited the vulnerability could obtain information to further compromise the user’s system. To exploit this vulnerability, an attacker would first have to log on to the system. An attacker could then run a specially crafted application. The update addresses the vulnerability by correcting how the Windows CSRSS handles objects in memory.
Affected products
- Microsoft Windows 10 Version 1607: 1607, 1709, 1803, 1809, 1903, 1909
- Microsoft Windows 7: all versions
- Microsoft Windows 8.1: all versions
- Microsoft Windows RT 8.1: all versions
- Microsoft Windows Server 2008: r2-sp1
- Microsoft Windows Server 2012: r2
- Microsoft Windows Server 2016: 1803, 1903, 1909
- Microsoft Windows Server 2019: all versions
- Microsoft Windows 10 Version 1507: from 10.0.10240.0 before publication — fixed in publication
- Microsoft Windows 10 1607: from 10.0.14393.0 before publication — fixed in publication
- Microsoft Windows 10 1709: from 10.0.0 before publication — fixed in publication
- Microsoft Windows 10 Version 1709 for 32-bit Systems: from 10.0.0 before publication — fixed in publication
- Microsoft Windows 10 1803: from 10.0.0 before publication — fixed in publication
- Microsoft Windows 10: from 10.0.17763.0 before publication — fixed in publication
- Microsoft Windows 10 Version 1903 for 32-bit Systems: from 10.0.0 before publication — fixed in publication
- Microsoft Windows 10 Version 1903 for ARM64-based Systems: from 10.0.0 before publication — fixed in publication
- Microsoft Windows 10 Version 1903 for x64-based Systems: from 10.0.0 before publication — fixed in publication
- Microsoft Windows 10 1909: from 10.0.0 before publication — fixed in publication
- Microsoft Windows 7: from 6.1.0 before publication — fixed in publication
- Microsoft Windows 7 Service Pack 1: from 6.1.0 before publication — fixed in publication
- Microsoft Windows 8.1: from 6.3.0 before publication — fixed in publication
- Microsoft Windows Server 2008 R2 Service Pack 1: from 6.1.7601.0 before publication — fixed in publication
- Microsoft Windows Server 2008 Service Pack 2: from 6.0.6003.0 before publication — fixed in publication
- Microsoft Windows Server 2012: from 6.2.9200.0 before publication — fixed in publication
- Microsoft Windows Server 2012 R2: from 6.3.9600.0 before publication — fixed in publication
- Microsoft Windows Server 2016: from 10.0.14393.0 before publication — fixed in publication
- Microsoft Windows Server 2019: from 10.0.17763.0 before publication — fixed in publication
- Microsoft Windows Server, version 1803 (Server Core Installation): from 10.0.0 before publication — fixed in publication
- Microsoft Windows Server, version 1903 (Server Core installation): from 10.0.0 before publication — fixed in publication
- Microsoft Windows Server, version 1909 (Server Core installation): from 10.0.0 before publication — fixed in publication
How to fix
Upgrade to a fixed version: Microsoft Windows 10 Version 1507 publication; Microsoft Windows 10 1607 publication; Microsoft Windows 10 1709 publication; Microsoft Windows 10 Version 1709 for 32-bit Systems publication; Microsoft Windows 10 1803 publication; Microsoft Windows 10 publication; Microsoft Windows 10 Version 1903 for 32-bit Systems publication; Microsoft Windows 10 Version 1903 for ARM64-based Systems publication; Microsoft Windows 10 Version 1903 for x64-based Systems publication; Microsoft Windows 10 1909 publication; Microsoft Windows 7 publication; Microsoft Windows 7 Service Pack 1 publication. Check the vendor advisory for mitigations.
References
- https://msrc.microsoft.com/update-guide/vulnerability/CVE-2020-1116
- https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2020-1116
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