CVE-2026-48852: Putty

Low severity, CVSS 3.7. EPSS: 0.4% chance of exploitation in the next 30 days.

PuTTY 0.71 before 0.84 has an assertion failure in ECDSA signature verification.

Affected products

• Putty Putty: from 0.71, before 0.84 (fixed in 0.84)

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