# PuTTY CAC security updates

The latest version of PuTTY CAC is 0.85.2.0, released September 30, 2026. Patch Radar has 2 security fixes for PuTTY CAC, closing 4 CVEs. The newest security fix is PuTTY CAC 0.84.0.0, released May 25, 2026. Version 0.85.2.0 adds no new CVE fixes and includes all of them.

- Web page: https://patchblox.com/security/product/windows-app/putty-cac
- Platform: Windows apps
- Vendor: Simon Tatham
- Latest version: 0.85.2.0 (Sep 30, 2026)
- Supported: yes

## Security fixes, newest first

| Fix | Released | Fixed in | Priority | CVEs | Exploited |
|---|---|---|---|---:|---:|
| PuTTY CAC 0.85.2.0 (latest, includes every fix below) | Sep 30, 2026 | 0.85.2.0 |  |  |  |
| [PuTTY CAC 0.84.0.0](https://patchblox.com/security/data/fix/windows-app/nomorefood.putty-cac-0.84.0.0.md) | May 25, 2026 | 0.84.0.0 | Routine | 3 | 0 |
| [PuTTY CAC 0.81.0.0](https://patchblox.com/security/data/fix/windows-app/nomorefood.putty-cac-0.81.0.0.md) | Apr 15, 2024 | 0.81.0.0 | Routine | 1 | 0 |

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Data as of 2026-11-08T19:12:23Z UTC. Source: Patchblox Patch Radar (https://patchblox.com/security/patch-radar). Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo

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