PatchTheCVECVE-2025-35021: By failing to authenticate three times to an unconfigured Abilis CPX device via SSH, an attacker can login to
CVE-2025-35021 is a medium-severity flaw (CVSS 6.5) affecting abilis cpx firmware. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.
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.
Why this priority
- Public exploit reference
- Remotely exploitable, no login, no user action
A fixed release or distro patch exists.
Risk facts
| CVSS score | 6.5 (Medium) |
| Attack vector | Network (remote) |
| Attack complexity | Low |
| Privileges needed | None |
| User interaction | None |
| EPSS exploit chance | 0.3% (top 74%) |
| CISA exploited list | No |
| Weakness | CWE-1188 |
| Published | 2025-11-04 |
| Last modified | 2026-10-18 |
Last updated 2026-10-18 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score
Am I affected?
Timeline
- Published CVE record published
- Updated Record last modified
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.
Quick answers
How do I fix CVE-2025-35021?
abilis cpx firmware: upgrade to 9.0.7. Exact commands for each OS are on this page.
Is CVE-2025-35021 being exploited?
CVE-2025-35021 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.
What does CVE-2025-35021 affect?
CVE-2025-35021 affects abilis cpx firmware. Severity is medium (CVSS 6.5). 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.
How urgent is CVE-2025-35021?
Priority 39/100. Public exploit reference; Remotely exploitable, no login, no user action