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