Improper Certificate Validation in ASE/Kalkitech ASE2000 V2 Communication Test Set on Windows
CVE-2026-90647

9.1CRITICAL

Key Information:

Vendor

Kalkitech

Status
Ase2000 V2 Communication Test Set
Vendor
CVE Published:
12 September 2026

What is CVE-2026-90647?

The ASE/Kalkitech ASE2000 V2 Communication Test Set, versions 2.35 through 2.37, for Windows is susceptible to an improper certificate validation vulnerability. This flaw arises within the IEC 60870-5-104 TLS client (Task Mode), permitting an attacker with network access to execute a Man-in-the-Middle attack. The attacker can exploit this weakness by using a certificate that possesses multiple simultaneous faults, thereby bypassing essential certificate validation mechanisms and compromising secure communications.

Affected Version(s)

ASE2000 V2 Communication Test Set Windows 2.35 < 2.38

References

https://www.ase-systems.com/wp-content/uploads/2026/07/CY...
vendor-advisory

CVSS V4

Score:
9.1
Severity:
CRITICAL
Confidentiality:
High
Integrity:
High
Availability:
None
Attack Vector:
Network
Attack Complexity:
High
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
None

Timeline

  • Vulnerability published

  • Vulnerability Reserved

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