Missing authentication in Fanvil x7a websocket handler
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- Low
- Impact type
- Security bypass
- Confidentiality · integrity · availability
- High · High · High
- Fix status
- No fix listed
Attack profile from CVSS 3.1 · CISA ADP. Fix status from CNA. Impact type from CWE-306.
Summary
Fanvil x7a firmware version 2.6.0.1182 has a websocket handler that does not enforce authentication restrictions against sessionless users. The missing check (CWE-306) lets anyone view device resources such as operational logs or run diagnostic requests. An unauthenticated remote attacker can do this without any user interaction.
Written with Claude Haiku 5.5 from the sources below · 2026-10-29
Description from the CNA
The websocket handler of Fanvil x7a firmware version 2.6.0.1182 does not enforce proper authentication restrictions against sessionless users. The lack of restrictions grants anyone the ability to view any device resources such as operational logs or perform diagnostic requests.
Why it matters now
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- Poc
- Automatable
- Yes
- Technical impact
- Total
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| — | — | all versions | — | No fix listed | CNA |
- — Vendor— Affected all versions Fixed in — No fix listed CNA
Remediation
The sources list no fixed version for Fanvil x7a firmware.
Written with Claude Haiku 5.5 from the sources below · 2026-10-29
Timeline
- 2026-10-07 Threatist record created from CVE-2025-70520
- 2026-10-07 Alias added: GHSA-r46f-86rj-p44j
- 2026-10-16 CVSS score added · CISA ADP
- 2026-10-16 Weakness changed · CISA ADP
- 2026-10-16 CISA SSVC decision points changed
- 2026-10-16 Priority changed: LOW → HIGH
References
Sources
- CVE-2025-70520 · CVE Program
- CVE-2025-70520 · NVD
- FIRST EPSS
- GHSA-r46f-86rj-p44j · GitHub Advisory Database · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences