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PuTTY

A free implementation of SSH and Telnet for Windows and Unix platforms, along with an xterm terminal emulator.

WindowsDeveloper ToolsOpen source

v0.85.0.0

3.7 MBscanned clean· 3 downloads

About

PuTTY is a client program for Windows that provides access to remote computer sessions over a network. It lets a user connect to another computer and work with that system through a window on the local Windows machine. Text entered in the window is sent to the remote computer, while responses from that computer are shown in the same window. This allows the user to interact with a remote system without being physically present at its console.

PuTTY supports the SSH, Telnet, Rlogin, and SUPDUP network protocols. These protocols are used to establish remote sessions between computers. The program handles the client side of each session, meaning it presents the session to the person using the Windows computer. It is suited to users who need a direct command-line connection to another machine, including people working with Unix systems through a network.

In MirrorNest, PuTTY is listed for the Windows platform under Developer Tools. Its open-source license makes the program available under the terms associated with open-source software. The platform and category placement make it relevant to Windows users looking for a tool for remote computer access and network-based development work.

MirrorNest mirrors the official PuTTY build directly on its own storage. Before publishing, the mirrored build is scanned for malware. This gives visitors a catalog copy sourced from the official build while keeping the download within MirrorNest’s distribution system.

Architecture: x64

What's new in v0.85.0.0

These features are new in 0.85 (released 2026-08-16): - Security issue: fixed a remotely triggerable use-after-free in Pageant. (Might be exploitable to execute code, although this is not proved.) - Security issue: fixed a remotely triggerable buffer overflow if the OpenSSH encrypt-then-MAC cipher modes are in use. (However they are only used if a server supports nothing else.) - Security issue: fixed a buffer overflow in private key decryption, if the private key is constructed maliciously. (Only triggerable on purpose if you let somebody else generate your key for you.) - Denial-of-service security fixes: a server can trigger a tight loop in PuTTY, and even a MITM can make it consume unlimited memory at startup.

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