CVE-2025-35021
Abilis CPX Fallback Shell Connection Relay
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.
Attack profile
How easy it is to exploit
- Attack vector
- Network
- Complexity
- Low
- Privileges needed
- None
- User interaction
- None
What an attacker can affect
- Confidentiality
- Low
- Integrity
- Low
- Availability
- None
Exploit likelihood
What each source reports
CVE List Score used
Abilis CPX Fallback Shell Connection Relay
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.
- Record
CVE-2025-35021- CVSS 3.1
- 6.5 Medium
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N - Weakness
- CWE-1188
- Updated
- 2026-11-02
EUVDEUVD-2025-37731
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.
- Record
EUVD-2025-37731- CVSS 3.1
- 6.5 Medium
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N - Updated
- 2026-11-02
GitHub AdvisoriesGHSA-6f2r-5p58-wvrf
By failing to authenticate three times to an unconfigured Abilis CPX device via SSH, an attacker...
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.
- Record
GHSA-6f2r-5p58-wvrf- CVSS 3.1
- 6.5 Medium
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N - Weakness
- CWE-1188
- Updated
- 2026-11-02
NVD
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.
- Record
CVE-2025-35021- CVSS 3.1
- 6.5 Medium
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N - Weakness
- CWE-1188
- Updated
- 2026-11-02
Affected products
History
| Recorded | Changed | Sources |
|---|---|---|
| first indexed | CVE List, EUVD, GitHub Advisories, NVD |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2025-35021 is a medium vulnerability (CVSS 6.5) in Abilis Cpx, published November 4, 2025. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.33%, the 26th percentile. No source names a fixed version.
References
runzero.com/advisories/abilis-cpx-authentication-bypass-cve-2025-35021
takeonme.org/gcves/GCVE-1337-2025-00000000000000000000000000000000000000000000000001011111111111011111111110000000000000000000000000000000000000000000000000000000100
support.abilis.net/relnotes/cpx2k/R9.0.html
nvd.nist.gov/vuln/detail/CVE-2025-35021
github.com/advisories/GHSA-6f2r-5p58-wvrf