CVE-2026-90647 Security feature bypass in ASE2000 V2 Communication Test Set
A network attacker can bypass TLS certificate validation in the Kalkitech ASE2000 to perform Man-in-the-Middle attacks on protected communications.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-90647?
CVE-2026-90647 is a critical vulnerability in Kalkitech ASE2000 V2 Communication Test Set, published on 12 Sep 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
ASE/Kalkitech ASE2000 V2 Communication Test Set 2.35 through 2.37 on Windows contains an improper certificate validation vulnerability in the IEC 60870-5-104 TLS client (Task Mode). This allows a network-positioned attacker to bypass certificate validation via a certificate with multiple simultaneous faults, enabling a Man-in-the-Middle attack on protected communications.
Weakness: CWE-295
Which versions are affected by CVE-2026-90647?
How do I fix CVE-2026-90647?
No fix has been published for CVE-2026-90647 yet. Limit exposure of the affected software until one is available.
Is CVE-2026-90647 being exploited?
There is no known exploitation of CVE-2026-90647 in the wild and no public exploit code.
Sources
Also known as GHSA-gcc5-22r7-2jf2.