A client program for the SSH, Telnet and Rlogin network protocols

PuTTY (32-bit)

PuTTY 0.55

  -  1.15 MB  -  Open Source

Sometimes latest versions of the software can cause issues when installed on older devices or devices running an older version of the operating system.

Software makers usually fix these issues but it can take them some time. What you can do in the meantime is to download and install an older version of PuTTY 0.55.


For those interested in downloading the most recent release of PuTTY (32-bit) or reading our review, simply click here.


All old versions distributed on our website are completely virus-free and available for download at no cost.


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If you have any questions or ideas that you want to share with us - head over to our Contact page and let us know. We value your feedback!

  • PuTTY 0.55 Screenshots

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    PuTTY 0.55 Screenshot 1
  • PuTTY 0.55 Screenshot 2
  • PuTTY 0.55 Screenshot 3
  • PuTTY 0.55 Screenshot 4
  • PuTTY 0.55 Screenshot 5

What's new in this version:

- Security fix: a vulnerability discovered by Core Security Technologies (advisory number CORE-2004-0705), potentially allowing arbitrary code execution on the client by a malicious server before host key verification, has been fixed.
- Bug fix: General robustness of the SSH-1 implementation has been improved, which may have fixed further potential security problems although we are not aware of any specific ones.
- Bug fix: Random noise generation was hanging some computers and interfering with other processes' precision timing, and should now not do so.
- Bug fix: dead key support should work better.
- Bug fix: a terminal speed is now sent to the SSH server.
- Bug fix: removed a spurious diagnostic message in Plink.
- Bug fix: the `-load' option in PSCP and PSFTP should work better.
- Bug fix: X forwarding on the Unix port can now talk to Unix sockets as well as TCP sockets.
- Bug fix: various crashes and assertion failures fixed..