CVE-2026-71960 PUBLISHED

Cudy WR3000 2.0 Hard-coded JWT Secret Authentication Bypass via MQTT

Assigner: VulnCheck
Reserved: 08.08.2026 Published: 19.08.2026 Updated: 19.08.2026

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.

CVSS Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N
CVSS Score: 9.3

Exploitability Metrics		Vulnerable System Impact Metrics		Subsequent System Impact Metrics
Attack Vector	Network	Confidentiality	High	Confidentiality	None
Attack Complexity	Low	Integrity	High	Integrity	None
Attack Requirements	None	Availability	None	Availability	None
Privileges Required	None
User Interaction	None

CVSS 4.0

CVSS Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
CVSS Score: 9.1

Attack Vector	Network	Scope	Unchanged
Attack Complexity	Low	Confidentiality Impact	High
Privileges Required	None	Integrity Impact	High
User Interaction	None	Availability Impact	None

CVSS 3.1

Product Status

Vendor	Shenzhen Cudy Technology Co., Ltd.
Product	WR3000 2.0
Versions	Default: affected affected from 0 to 2.5.24 (excl.)

CVE-2026-71960 PUBLISHED

Cudy WR3000 2.0 Hard-coded JWT Secret Authentication Bypass via MQTT

Metrics

Product Status

Credits

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Problem Types