An issue was discovered on FiberHome Fengine S5800 switches V210R240.
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- High
- Impact type
- Denial of service
- Confidentiality · integrity · availability
- None · None · High
- Fix status
- No fix listed
Attack profile from CVSS 3.1 · NVD. Fix status from CNA. Impact type from CWE-400.
Summary
An issue was discovered on FiberHome Fengine S5800 switches V210R240. An unauthorized attacker can access the device's SSH service, using a password cracking tool to establish SSH connections quickly. This will trigger an increase in the SSH login timeout (each of the login attempts will occupy a connection slot for a longer time). Once this occurs, legitimate login attempts via SSH/telnet will be refused, resulting in a denial of service; you must restart the device.
Why it matters now
SSVC decision points
Not available: CISA has not published SSVC decision points for this record.
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
CPE configurations NVD · 6
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:o:fiberhome:fengine_s5800_firmware:v210r240:*:*:*:*:*:*:* | v210r240 | Vulnerable | FiberHome |
| cpe:2.3:h:fiberhome:fengine_28f-s:-:*:*:*:*:*:*:* | not specified by NVD | Running on | FiberHome |
| cpe:2.3:h:fiberhome:fengine_52f-s:-:*:*:*:*:*:*:* | not specified by NVD | Running on | FiberHome |
| cpe:2.3:h:fiberhome:fengine_52t-s:-:*:*:*:*:*:*:* | not specified by NVD | Running on | FiberHome |
| cpe:2.3:h:fiberhome:fengine_s5800-28t-s:-:*:*:*:*:*:*:* | not specified by NVD | Running on | FiberHome |
| cpe:2.3:h:fiberhome:fengine_s5800-28t-s-pe:-:*:*:*:*:*:*:* | not specified by NVD | Running on | FiberHome |
- cpe:2.3:o:fiberhome:fengine_s5800_firmware:v210r240:*:*:*:*:*:*:* Versions v210r240 Vulnerable ·FiberHome
- cpe:2.3:h:fiberhome:fengine_28f-s:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·FiberHome
- cpe:2.3:h:fiberhome:fengine_52f-s:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·FiberHome
- cpe:2.3:h:fiberhome:fengine_52t-s:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·FiberHome
- cpe:2.3:h:fiberhome:fengine_s5800-28t-s:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·FiberHome
- cpe:2.3:h:fiberhome:fengine_s5800-28t-s-pe:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·FiberHome
Remediation
No fixed version listed by the sources yet.
Timeline
- 2026-10-02 Threatist record created from CVE-2017-5544
- 2026-10-03 Alias added: GHSA-crmv-fcq6-r57v
References
Other 1
Sources
- CVE-2017-5544 · CVE Program
- CVE-2017-5544 · NVD
- FIRST EPSS
- GHSA-crmv-fcq6-r57v · 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