---
title: "CVE-2026-90647: ASE/Kalkitech ASE2000 V2 - Man-in-the-Middle"
description: "ASE/Kalkitech ASE2000 V2 Communication Test Set 2.35 through 2.37 contains a man-in-the-middle vulnerability caused by improper certificate validation in the IEC 60870-5-104 TLS client (Task Mode), letting network-positioned attackers intercept protected communications, exploit requires attacker to be positioned on the network."
url: https://panop.io/threat-heartbeat/CVE-2026-90647/
---

# CVE-2026-90647 ASE/Kalkitech ASE2000 V2 - Man-in-the-Middle

ASE/Kalkitech ASE2000 V2 Communication Test Set 2.35 through 2.37 contains a man-in-the-middle vulnerability caused by improper certificate validation in the IEC 60870-5-104 TLS client (Task Mode), letting network-positioned attackers intercept protected communications, exploit requires attacker to be positioned on the network.

CVSS base score 7.4 /10

High

CISA KEV

Not listed

Public exploit

None known

Authentication

Not required

EPSS

0.21% chance of exploitation in 30 days

[View the NVD record ↗](https://nvd.nist.gov/vuln/detail/CVE-2026-90647)

## Details

Type

Man-in-the-Middle

Impact

Man In The Middle

CVSS vector

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N

Published

12 September 2026

Updated

15 October 2026

Weakness

[CWE-295](https://cwe.mitre.org/data/definitions/295.html)

## Vendor fix

Update to the latest version beyond 2.37.

Patching closes this CVE. It does not tell you which of your systems run the affected version, or what else is exposed alongside them.

## References

- [https://nvd.nist.gov/vuln/detail/CVE-2026-90647](https://nvd.nist.gov/vuln/detail/CVE-2026-90647)
- [https://www.ase-systems.com/wp-content/uploads/2026/07/CYB\_2026\_86278\_Advisory\_v1.0.pdf](https://www.ase-systems.com/wp-content/uploads/2026/07/CYB_2026_86278_Advisory_v1.0.pdf)

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## What this record can't tell you

- Whether you run the affected software, and where
- Whether an attacker can actually reach and exploit it
- The misconfigurations that never get a CVE number
- What it would cost the business, ranked into what to fix first

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