Cudy WR3000 2.0 Hard-coded JWT Secret Authentication Bypass via MQTT
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- Low
- Attack requirements
- None
- Impact type
- Security bypass
- Confidentiality · integrity · availability
- High · High · None
- Fix status
- Fixed
Attack profile from CVSS 4.0 · CNA. Fix status from CNA. Impact type from CWE-798.
Summary
Cudy WR3000 2.0 running firmware before 2.5.24 contains a hard-coded JWT HMAC signing secret vulnerability in the Mosquitto MQTT broker's authentication plugin that allows unauthenticated attackers to forge valid JWT tokens by extracting the secret from the firmware image. Attackers can use the extracted secret to craft arbitrary JWT tokens and authenticate to the MQTT broker without legitimate credentials, gaining unauthorized access to the device's mesh networking interface.
Why it matters now
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- None
- 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 |
|---|---|---|---|---|---|
| Shenzhen Cudy Technology Co., Ltd. | WR3000 2.0 | before 2.5.24 | 2.5.24 | Patch available | CNA |
| Shenzhen Cudy Technology Co., Ltd. | P5 V1.1 | 2.4.25 – 2.4.27 | — | No fix listed | CNA |
- WR3000 2.0 VendorShenzhen Cudy Technology Co., Ltd. Affected before 2.5.24 Fixed in 2.5.24 Patch available CNA
- P5 V1.1 VendorShenzhen Cudy Technology Co., Ltd. Affected 2.4.25 – 2.4.27 Fixed in — No fix listed CNA
Remediation
- Fix · CNA WR3000 2.0 (Shenzhen Cudy Technology Co., Ltd.) Fixed in 2.5.24
Fixed in the same release
Records fixed by the same vendor advisory or release, as the CNA lists them.
- Release ·
Shenzhen Cudy Technology WR3000 2.0 2.5.24
2 records Highest priority Priority MEDIUM 2 MEDIUM
Other records, highest priority first
- TI-2026-50256 Cudy WR3000 2.0 OS Command Injection via Mesh MQTT Command HandlerPriority MEDIUM 45
Timeline
- 2026-10-02 Threatist record created from CVE-2026-71960
- 2026-10-03 Alias added: GHSA-jw4g-pv34-hp37
References
Other 1
More Shenzhen Cudy Technology Co., Ltd. vulnerabilities
- TI-2026-50256 Cudy WR3000 2.0 OS Command Injection via Mesh MQTT Command Handler CVSS 4.0HIGH 8.7
- TI-2026-25297 Cudy LT300 3.0 OS Command Injection via NTP Configuration CVSS 4.0HIGH 8.7
Sources
- CVE-2026-71960 · CVE Program
- CVE-2026-71960 · NVD
- FIRST EPSS
- GHSA-jw4g-pv34-hp37 · 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