CVE-2025-35021 Abilis CPX Fallback Shell Connection Relay
Attackers can bypass SSH authentication on unconfigured Abilis CPX devices to access a restricted shell and relay connections.
- 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-2025-35021?
CVE-2025-35021 is a medium-severity authentication bypass vulnerability in Abilis CPX, published on 4 Nov 2025. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
By failing to authenticate three times to an unconfigured Abilis CPX device via SSH, an attacker can login to a restricted shell on the fourth attempt, and from there, relay connections.
Weakness: CWE-1188
Which versions are affected by CVE-2025-35021?
It affects 1 product.
Products include Antek Abilis Cpx Firmware.
How do I fix CVE-2025-35021?
No fix has been published for CVE-2025-35021 yet. Limit exposure of the affected software until one is available.
Upgrade, and rotate credentials and sessions that may have been exposed. More about Authentication bypass.
Is CVE-2025-35021 being exploited?
There is no known exploitation of CVE-2025-35021 in the wild and no public exploit code.
Sources
Also known as GHSA-6f2r-5p58-wvrf.