High severity · published Aug 27, 2026
CVE-2026-18717
Improper Certificate Validation in ASE 2000
7.4
CVSS
0.3%
EPSS
No
On KEV
Description
ASE2000 2.35 through 2.37 is vulnerable to an improper certificate validation vulnerability, which may allow an attacker to impersonate the trusted peer, complete the TLS handshake, and read or modify protected communications.
CVSS vector
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N
Attack vector
Network
Complexity
High
Privileges
None
User interaction
None
Confidentiality
High
Integrity
High
Availability
None
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.3% · higher than 20% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
AV
ASE2000 V2 · Applied Systems Engineering
2.25 through 2.37 · source: vendor
In the news
VulnerabilityCritical
Applied Systems Engineering ASE2000 V2 Communications Test Set
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 Sys...
Aug 27, 2026·CISA Advisories
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-18717
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-18717
www.ase-systems.com
http://www.ase-systems.com
github.com
https://github.com/cisagov/CSAF/blob/develop/csaf_files/OT/white/2026/icsa-26-239-04.json
www.cisa.gov
https://www.cisa.gov/news-events/ics-advisories/icsa-26-239-04
