CVE-2026-48851: Putty

Low severity, CVSS 3.1. EPSS: 0.3% chance of exploitation in the next 30 days.

PuTTY 0.77 before 0.84 uses a copy of the PuTTY icon as a trust indication for TELNET data but the trust status is not cleared between proxy authentication and the main session.

Affected products

• Putty Putty: from 0.77, before 0.84 (fixed in 0.84)

Published 2026-05-25. Last modified 2026-07-24.