PuTTY version history
6 recorded versions, newest first. Each has its own page with release notes and the official download link.
| Version | Released | Platforms | What changed |
|---|---|---|---|
| PuTTY 0.85 Newest | 16 Aug 2026 | Windows x64 | Security issue: fixed a remotely triggerable use-after-free in Pageant. |
| PuTTY 0.84 | 22 May 2026 | Windows x64 | Security issue: fixed a remotely triggerable double-free in RSA key exchange. |
| PuTTY 0.83 | 8 Feb 2025 | Windows x64 | Support for ML-KEM, the NIST-standardised post-quantum key exchange mechanism. |
| PuTTY 0.82 | 27 Nov 2024 | Windows x64 | Major refactoring of Unicode handling to allow the use of 'foreign' Unicode characters, i. |
| PuTTY 0.81 | 15 Apr 2024 | Windows x64 | Security fix for CVE-2024-31497 : NIST P521 / ecdsa-sha2-nistp521 signatures are no longer generated with bia… |
| PuTTY 0.80 | 18 Dec 2023 | Windows x64 | Security fix: support for OpenSSH's new kex-strict protocol modification, addressing a vulnerability in some… |
Downloads are provided by the publisher. Older versions can contain security problems that later releases fixed. How we record versions