EUVD-2026-67309
GHSA-qvg5-fcgx-c529
Severity by source
CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Network-reachable but requires an on-path MITM (AC:H) with no privileges or user interaction; certificate bypass exposes and lets attacker alter traffic (C:H/I:H), no availability impact.
Primary rating from Vendor (icscert).
CVSS VectorVendor: icscert
Lifecycle Timeline
6DescriptionCVE.org
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.
AnalysisAI
TLS peer impersonation in Applied Systems Engineering's ASE2000 v2 (versions 2.35 through 2.37) lets a network-positioned attacker complete the TLS handshake as a fraudulent trusted peer because the client fails to properly validate the server certificate (CWE-295). Successful exploitation exposes and allows tampering with protected SCADA/RTU communications carried over the ostensibly secure channel. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Exploitation requires an active man-in-the-middle position on the network path between the ASE2000 v2 client and its intended TLS peer - the attacker must be able to intercept the session and present a substitute certificate that the client's flawed validation accepts. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The vendor-supplied CVSS 4.0 base score is 9.1 (Critical) with vector AV:N/AC:H/AT:N/PR:N/UI:N/VC:H/VI:H/VA:N - network reach, no privileges or user interaction, but High attack complexity reflecting the need for a man-in-the-middle position, and High confidentiality and integrity impact with no availability impact. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in. |
| Exploit Scenario | Full exploit scenario with step-by-step reproduction available after sign-in. |
| Remediation | No exact vendor-released fix version is present in the provided data, so patch status could not be independently confirmed - consult CISA advisory ICSA-26-239-04 (https://www.cisa.gov/news-events/ics-advisories/icsa-26-239-04) and Applied Systems Engineering (http://www.ase-systems.com) for the patched build and upgrade beyond 2.37 once published. … Detailed patch versions, workarounds, and compensating controls in full report. |
Recommended ActionAI
Within 24 hours, identify and document all ASE2000 v2 systems running versions 2.35-2.37 and immediately restrict network access to these systems using firewall rules, VLANs, or air-gapping where operationally feasible. …
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Same weakness CWE-295 – Improper Certificate Validation
View allSame technique Information Disclosure
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External POC / Exploit Code
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