Download — Libssl-1_1-x64.dll

This Dynamic Link Library (DLL) is responsible for implementing the and TLS (Transport Layer Security) protocols. It provides the "handshake" and encryption logic that allows applications—ranging from web browsers and email clients like Mosquitto to development environments like Qt Creator —to communicate securely over a network. Why Errors Occur

An application requires a specific sub-version of OpenSSL 1.1 that is not currently installed. libssl-1_1-x64.dll Download

Insecure libssl-1_1-x64.dll installed with Power BI Desktop July 2025 This Dynamic Link Library (DLL) is responsible for

Older versions of this DLL are known to contain critical vulnerabilities, such as CVE-2022-0778 , which can lead to denial-of-service attacks or remote code execution. Insecure libssl-1_1-x64

OpenSSL 1.1.1 reached its "End of Life" in September 2023, meaning it no longer receives official security updates from the OpenSSL Project. The Risks of Manual Downloads

Users typically encounter errors such as "The program can't start because libssl-1_1-x64.dll is missing" when a program expects the library to be present in its installation folder or the system PATH but cannot find it. Common causes include:

The program failed to bundle the necessary OpenSSL dependencies.