By failing to authenticate three times to an unconfigured Abilis CPX device via SSH, an attacker can login to a
Source GCVE Database
Not known to be exploited · CVSS 6.5 Medium.
Data as of 30 Oct 2026, 16:15 UTC
Thin evidence
One scorer or none| CNA (AHA) | CVSS 3.1 | 6.5 |
|---|
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:NExploitation evidence
Disclosed: evidence found.
CVE published 4 Nov 2025
Detectable: no evidence on record.
No public nuclei template indexed
Weaponized: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by Mirage: no evidence on record.
No attack traffic recorded by OffSeq Mirage sensors
A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 30 Oct 2026.
What to do
AI-suggested
Since the vulnerability affects unconfigured devices, ensuring proper device configuration and disabling or securing SSH access before deployment is recommended. Monitor vendor advisories for any future patches or official remediation guidance.
Description
An unconfigured Abilis CPX device allows an attacker to bypass normal SSH authentication by failing to authenticate three times, enabling login to a restricted shell on the fourth attempt. From this restricted shell, the attacker can relay connections. This vulnerability has a medium severity rating with a CVSS score of 6.5.
References
- nvd.nist.gov/vuln/detail/CVE-2025-35021 (opens in a new tab)
- support.abilis.net/relnotes/cpx2k/R9.0.html (opens in a new tab)
- takeonme.org/cves/cve-2025-35021 (opens in a new tab)
- takeonme.org/gcves/GCVE-1337-2025-00000000000000000000000000000000000000000000000001011111111111011111111110000000000000000000000000000000000000000000000000000000100 (opens in a new tab)
- runzero.com/advisories/abilis-cpx-authentication-bypass-cve-2025-35021 (opens in a new tab)