CVE-2021-31756 — CRITICAL (9.8)

Q: How severe is CVE-2021-31756?

CVE-2021-31756 has been rated CRITICAL with a CVSS base score of 9.8/10. This is considered a critical vulnerability requiring immediate attention.

Q: Is there a patch for CVE-2021-31756?

Check the references section above for vendor advisories and patch information. Affected products include: Tenda Ac11 Firmware, Tenda Ac11.

Vulnerability Description

An issue was discovered on Tenda AC11 devices with firmware through 02.03.01.104_CN. A stack buffer overflow vulnerability in /gofrom/setwanType allows attackers to execute arbitrary code on the system via a crafted post request. This occurs when input vector controlled by malicious attack get copied to the stack variable.

CVSS Score

9.8

CRITICAL

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

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality

HIGH

Integrity

HIGH

Availability

HIGH

Affected Products

Vendor	Product	Versions
Tenda	Ac11 Firmware	<= 02.03.01.104_cn
Tenda	Ac11	-

Related Weaknesses (CWE)

CWE-787

References

https://github.com/Yu3H0/IoT_CVE/tree/main/Tenda/CVE_1ExploitIssue TrackingThird Party Advisory
https://github.com/Yu3H0/IoT_CVE/tree/main/Tenda/CVE_1ExploitIssue TrackingThird Party Advisory

FAQ

What is CVE-2021-31756?

CVE-2021-31756 is a vulnerability with a CVSS score of 9.8 (CRITICAL). An issue was discovered on Tenda AC11 devices with firmware through 02.03.01.104_CN. A stack buffer overflow vulnerability in /gofrom/setwanType allows attackers to execute arbitrary code on the syste...

How severe is CVE-2021-31756?

CVE-2021-31756 has been rated CRITICAL with a CVSS base score of 9.8/10. This is considered a critical vulnerability requiring immediate attention.

Is there a patch for CVE-2021-31756?

Check the references section above for vendor advisories and patch information. Affected products include: Tenda Ac11 Firmware, Tenda Ac11.