CVE-2019-1171: Microsoft Windows 10

Medium severity, CVSS 5.6. EPSS: 1.4% chance of exploitation in the next 30 days.

An information disclosure vulnerability exists in SymCrypt during the OAEP decryption stage. An attacker who successfully exploited this vulnerability could obtain information to further compromise the user’s system. To exploit this vulnerability, an attacker would have to log on to an affected system and run a specially crafted application. The vulnerability would not allow an attacker to execute code or to elevate user rights directly, but it could be used to obtain information that could be used to try to further compromise the affected system. The update addresses the vulnerability through a software change to the OAEP decoding operations.

Affected products

• Microsoft Windows 10: affected versions not specified; version 1607 only; version 1703 only; version 1709 only; version 1803 only; version 1809 only; …
• Microsoft Windows Server 2016: version 1803 only; version 1903 only
• Microsoft Windows Server 2019: affected versions not specified

Published 2019-08-14. Last modified 2026-06-17.