What is CVE-2026-18717?

Upgrade to ASE2000 version 2.38 or later. interim measures: restrict write access to installation directories, avoid IEC 60870-5-104 over TLS on untrusted networks, and enforce host-based firewall protection.

Is CVE-2026-18717 known to be exploited?

It is not marked known-exploited in this record.

How should CVE-2026-18717 be mitigated?

Upgrade to ASE2000 version 2.38 or later. interim measures: restrict write access to installation directories, avoid IEC 60870-5-104 over TLS on untrusted networks, and enforce host-based firewall protection.

CVE-2026-18717

CCISA AdvisoriesinVulnerability·Aug 29critical

Critical Vulnerabilities Discovered in Applied Systems Engineering ASE2000 V2 Communications Test Set

CISA has issued an industrial control systems advisory detailing two vulnerabilities in the Applied Systems Engineering ASE2000 V2 Communications Test Set. CVE-2018-1285 is an XXE vulnerability in the bundled log4net library that could allow arbitrary file read/write. CVE-2026-18717 is an improper certificate validation flaw that could permit TLS handshake interception and modification. Affected versions range from 2.25 to 2.37. ASE/Kalkitech has released version 2.38 addressing both issues.

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CVE-2026-18717

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Critical Vulnerabilities Discovered in Applied Systems Engineering ASE2000 V2 Communications Test Set