What’s Vulnerable › Vulnerabilities

CVE-2019-1091

• Severity: medium (CVSS 5.5 v3.0)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 2.0% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2019-07-15 · updated 2026-06-17
• Weakness: CWE-200

Description

An information disclosure vulnerability exists when Unistore.dll fails to properly handle objects in memory, aka 'Microsoft unistore.dll Information Disclosure Vulnerability'.

Affected products

• Microsoft Windows 10 Version 1607: 1607, 1703, 1709, 1803, 1809, 1903
• Microsoft Windows Server 2016: 1803, 1903
• Microsoft Windows Server 2019: all versions
• Microsoft Corporation Windows: 10 for 32-bit Systems, 10 for x64-based Systems, 10 Version 1607 for 32-bit Systems, 10 Version 1607 for x64-based Systems, 10 Version 1703 for 32-bit Systems, 10 Version 1703 for x64-based Systems (+9)
• Microsoft Windows 10 Version 1903 for 32-bit Systems: all versions
• Microsoft Windows 10 Version 1903 for ARM64-based Systems: all versions
• Microsoft Windows 10 Version 1903 for x64-based Systems: all versions
• Microsoft Windows Server: 2016, 2016 (Core installation), version 1803 (Core Installation), 2019, 2019 (Core installation)
• Microsoft Windows Server, version 1903 (Server Core installation): all versions

References

• https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2019-1091
• https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2019-1091

Get alerted when CVE-2019-1091 or the next vulnerability affects your stack