CVE-2025-56221: Ascertia Signinghub

Critical severity, CVSS 9.8. EPSS: 0.6% chance of exploitation in the next 30 days.

A lack of rate limiting in the login mechanism of SigningHub v8.6.8 allows attackers to bypass authentication via a brute force attack.

Affected products

• Ascertia Signinghub: up to and including 8.6.8

Published 2025-10-17. Last modified 2026-06-17.