CVE-2021-40546 — MEDIUM (4.9)

Vulnerability Description

Tenda AC6 US_AC6V4.0RTL_V02.03.01.26_cn.bin allows attackers (who have the administrator password) to cause a denial of service (device crash) via a long string in the wifiPwd_5G parameter to /goform/setWifi.

CVSS Score

4.9

MEDIUM

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

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

HIGH

User Interaction

NONE

Scope

UNCHANGED

Confidentiality

NONE

Integrity

NONE

Availability

HIGH

Affected Products

Vendor	Product	Versions
Tenda	Ac6 Firmware	02.03.01.26
Tenda	Ac6	4.0

Related Weaknesses (CWE)

CWE-404

References

https://github.com/doudoudedi/buffer_overflow/blob/main/Tenda%20AC6%20V4.0-DeniaExploitThird Party Advisory
https://github.com/doudoudedi/buffer_overflow/blob/main/Tenda%20AC6%20V4.0-DeniaExploitThird Party Advisory

FAQ

What is CVE-2021-40546?

CVE-2021-40546 is a vulnerability with a CVSS score of 4.9 (MEDIUM). Tenda AC6 US_AC6V4.0RTL_V02.03.01.26_cn.bin allows attackers (who have the administrator password) to cause a denial of service (device crash) via a long string in the wifiPwd_5G parameter to /goform/...

How severe is CVE-2021-40546?

CVE-2021-40546 has been rated MEDIUM with a CVSS base score of 4.9/10. Review the CVSS metrics above for detailed severity breakdown.

Is there a patch for CVE-2021-40546?

Check the references section above for vendor advisories and patch information. Affected products include: Tenda Ac6 Firmware, Tenda Ac6.