Denial of service in Dbit WIFI4 N300 via malformed login request
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- Low
- Impact type
- —
- Confidentiality · integrity · availability
- High · High · High
- Fix status
- No fix listed
Attack profile from CVSS 3.1 · CISA ADP. Fix status from CNA.
Summary
Dbit WIFI4 N300 1.0.0 devices allow the management interface to be crashed by a request that lacks a username or password field in /api/login. The flaw is improper input validation (CWE-20) in a JSON parser. An attacker on the local Wi-Fi network can crash the management interface without authentication.
Written with Claude Haiku 5.5 from the sources below · 2026-10-29
Description from the CNA
Dbit WIFI4 N300 1.0.0 devices allow the management interface to be crashed via a request (from the local Wi-Fi network) that lacks a /api/login username or password field. This occurs because of an error in a JSON parser.
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 Dbit WIFI4 N300.
Written with Claude Haiku 5.5 from the sources below · 2026-10-29
Timeline
- 2026-10-06 Threatist record created from CVE-2025-71383
- 2026-10-06 Alias added: GHSA-rmvf-vpmv-h9w6
- 2026-10-08 CVSS score added · CISA ADP
- 2026-10-08 Weakness changed · CISA ADP
- 2026-10-08 CISA SSVC decision points changed
- 2026-10-08 Priority changed: LOW → HIGH
References
Sources
- CVE-2025-71383 · CVE Program
- CVE-2025-71383 · NVD
- FIRST EPSS
- GHSA-rmvf-vpmv-h9w6 · GitHub Advisory Database · CC BY 4.0
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