CVE-2026-90647: Kalkitech ASE2000 v2 Communication Test Set

High severity, CVSS 7.4. EPSS: 0.2% chance of exploitation in the next 30 days.

ASE/Kalkitech ASE2000 V2 Communication Test Set 2.35 through 2.37 on Windows contains an improper certificate validation vulnerability in the IEC 60870-5-104 TLS client (Task Mode). This allows a network-positioned attacker to bypass certificate validation via a certificate with multiple simultaneous faults, enabling a Man-in-the-Middle attack on protected communications.

Affected products

• Kalkitech ASE2000 v2 Communication Test Set: from 2.35, before 2.38 (fixed in 2.38)

Published 2026-09-12. Last modified 2026-09-22.