Applied Systems Engineering ASE2000 V2 Communications Test Set

TL;DR

View CSAF Summary Successful exploitation of these vulnerabilities could allow an attacker to read or write arbitrary local files, cause the application to issue outbound network requests, or intercept the connection to impersonate the trusted peer, complete the TLS handshake, and read or modify the protected communications. The following versions of Applied Systems Engineering ASE2000 V2 Communications Test Set are affected: ASE2000 >=2.25|<=2.37 (CVE-2018-1285, CVE-2026-18717) CVSS Vendor Equipment Vulnerabilities

v3 9.8 Applied Systems Engineering Applied Systems Engineering ASE2000 V2 Communications Test Set Improper Restriction of XML External Entity Reference, Improper Certificate Validation

Background Critical Infrastructure Sectors: Chemical, Critical Manufacturing, Energy, Water and Wastewater Countries/Areas Deployed: Worldwide Company Headquarters Location: United States Vulnerabilities Expand All + CVE-2018-1285 ASE2000 versions 2.25 through 2.37 is vulnerable to Apache log4net versions before 2.0.10 do not disable XML external entities when parsing log4net configuration files. This allows for XXE based attacks in applications that accept attacker controlled log4net configuration files. View CVE Details Affected Products Applied Systems Engineering ASE2000 V2 Communications Test Set Vendor: Applied Systems Engineering Product Version: Applied Systems Engineering ASE2000: >=2.25|<=2.37 Product Status: known_affected Remediations Mitigation ASE/Kalkitech provides an upgraded version 2.38 that fixes both vulnerabilities and customers are advised to upgrade to version 2.38. In version 2.38 the bundled log4net library is upgraded to version 3.3.1.0, and the IEC 60870-5-104 TLS client certificate validation logic is corrected to ensure proper validation of certificate error conditions. Vendor fix All customers running ASE2000 versions 2.25 through 2.37 are affected by this issue and are required to upgrade to version 2.38 or later to apply the security

What Happened

Applied Systems Engineering ASE2000 V2 Communications Test Set, reported by CISA.

View CSAF Summary Successful exploitation of these vulnerabilities could allow an attacker to read or write arbitrary local files, cause the application to issue outbound network requests, or intercept the connection to impersonate the trusted peer, complete the TLS handshake, and read or modify the protected communications. The following versions of Applied Systems Engineering ASE2000 V2 Communications Test Set are affected: ASE2000 >=2.25|<=2.37 (CVE-2018-1285, CVE-2026-18717) CVSS Vendor Equipment Vulnerabilities

v3 9.8 Applied Systems Engineering Applied Systems Engineering ASE2000 V2 Communications Test Set Improper Restriction of XML External Entity Reference, Improper Certificate Validation

Background Critical Infrastructure Sectors: Chemical, Critical Manufacturing, Energy, Water and Wastewater Countries/Areas Deployed: Worldwide Company Headquarters Location: United States Vulnerabilities Expand All + CVE-2018-1285 ASE2000 versions 2.25 through 2.37 is vulnerable to Apache log4net versions before 2.0.10 do not disable XML external entities when parsing log4net configuration files. This allows for XXE based attacks in applications that accept attacker controlled log4net configuration files. View CVE Details Affected Products Applied Systems Engineering ASE2000 V2 Communications Test Set Vendor: Applied Systems Engineering Product Version: Applied Systems Engineering ASE2000: >=2.25|<=2.37 Product Status: known_affected Remediations Mitigation ASE/Kalkitech provides an upgraded version 2.38 that fixes both vulnerabilities and customers are advised to upgrade to version 2.38. In version 2.38 the bundled log4net library is upgraded to version 3.3.1.0, and the IEC 60870-5-104 TLS client certificate validation logic is corrected to ensure proper validation of certificate error conditions. Vendor fix All customers running ASE2000 versions 2.25 through 2.37 are affected by this issue and are required to upgrade to version 2.38 or later to apply the security

For the full technical details, see the original report.

Why It Matters for Businesses

This development could affect organizations that rely on the impacted technologies or services. Unpatched systems, misconfigured infrastructure, or lack of monitoring can leave businesses exposed to exploitation, data breaches, and regulatory penalties.

How to Check Your Exposure

Run a free scan on NEL Professional's Cyber Risk Scanner to check whether your domain is affected. The scan covers SSL/TLS, security headers, DNS configuration, email authentication, and more across 16 modules.

Check Your Domain Security

Mitigation Steps

• Patch immediately, Apply vendor patches or updates as soon as they are available.
• Review configurations, Check firewall rules, access controls, and security headers.
• Monitor logs, Watch for indicators of compromise (IOCs) related to this threat.
• Update security policies, Ensure incident response plans cover this type of threat.
• Run a security scan, Use automated tools to verify your exposure.

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