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PUTTY: A FREE SSH AND TELNET CLIENT

Home | FAQ | Feedback | Licence | Updates | Mirrors | Keys | Links | Team
Download: Stable · Snapshot | Docs | Changes | Wishlist

PuTTY is a free implementation of SSH and Telnet for Windows and Unix platforms,
along with an xterm terminal emulator. It is written and maintained primarily by
Simon Tatham.

The latest version is 0.81. Download it here.

LEGAL WARNING: Use of PuTTY, PSCP, PSFTP and Plink is illegal in countries where
encryption is outlawed. We believe it is legal to use PuTTY, PSCP, PSFTP and
Plink in England and Wales and in many other countries, but we are not lawyers,
and so if in doubt you should seek legal advice before downloading it. You may
find useful information at cryptolaw.org, which collects information on
cryptography laws in many countries, but we can't vouch for its correctness.

Use of the Telnet-only binary (PuTTYtel) is unrestricted by any cryptography
laws.


LATEST NEWS

2024-04-15 PuTTY 0.81 released

PuTTY 0.81, released today, fixes a critical vulnerability CVE-2024-31497 in the
use of 521-bit ECDSA keys (ecdsa-sha2-nistp521). If you have used a 521-bit
ECDSA private key with any previous version of PuTTY, consider the private key
compromised: remove the public key from authorized_keys files, and generate a
new key pair.

However, this only affects that one algorithm and key size. No other size of
ECDSA key is affected, and no other key type is affected.

2023-12-18 PuTTY 0.80 released

PuTTY 0.80, released today, includes a fix for the Terrapin vulnerability in
some SSH protocol extensions (aka CVE-2023-48795). The issue also needs patching
in the server.

2023-08-26 PuTTY 0.79 released

PuTTY 0.79, released today, is mostly a bug fix release, with only minor new
features in SSH and terminal mouse handling.

The most important bug fix is that we've restored the Windows 'install scope' to
the way it was in 0.77 and earlier, reverting the security workaround we had to
put into 0.78. This means the 0.79 Windows installer will not uninstall 0.78
automatically, so we recommend uninstalling 0.78 by hand first, if you have it
installed. As before, if you've ended up with both versions installed,
uninstalling them both and then running the new installer will put everything
right.

2023-07-31 GPG key rollover

We've generated a fresh set of GPG keys for signing PuTTY release and snapshot
builds, since the old ones were due to expire. We will begin signing snapshots
with the new snapshot key, and future releases with the new release key. For
continuity, the new master key is signed with the old master key. See the keys
page for more information.


SITE MAP

 * Licence conditions under which you may use PuTTY.
 * The FAQ.
 * The documentation.
 * Download PuTTY:
   * latest release 0.81
   * development snapshots
   
 * Subscribe to the PuTTY-announce mailing list to be notified of new releases.
 * Feedback and bug reporting: contact address and guidelines. Please read the
   guidelines before sending us mail; we get a very large amount of mail and it
   will help us answer you more quickly.
 * Changes in recent releases.
 * Wish list and list of known bugs.
 * Links to related software and specifications elsewhere.
 * A page about the PuTTY team members.



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(last modified on Mon Apr 15 20:02:39 2024)