PuTTY

PuTTY 0.85 (August 16, 2026) is Simon Tatham's SSH / Telnet client. putty download, putty download windows, putty ssh, puttygen, putty for windows, putty portable download. Security update: Pageant use-after-free, OpenSSH EtM buffer, key decrypt, two DoS. RSS instead of the announce list.

What's new in 0.85 (August 16, 2026)

• Pageant use-after-free fix
• OpenSSH encrypt-then-MAC buffer
• Private key decrypt buffer
• Two denial-of-service fixes
• Announce list replaced by RSS

Key Features

• SSH and Telnet
• Serial
• puttygen / Pageant / Plink / PSCP / PSFTP
• 64-bit x86 installer
• Portable zip

Getting Started

1. Download 0.85.
2. Extract on Windows 10/11.
3. Run putty.exe.
4. Host name, SSH, Open.
5. Notes in files/notes/.

FAQ

0.84? Upgrade. 0.85 is the security pin.

puttygen? In the same zip.

Requirements

Windows 10/11. 64-bit x86 or Arm builds exist.

License

MIT notes - Copyright (C) 2026 puttywin