CVE-2021-31755

An issue was discovered on Tenda AC11 devices with firmware through 02.03.01.104_CN. A stack buffer overflow vulnerability in /goform/setmac allows attackers to execute arbitrary code on the system via a crafted post request.

CVSS v3.1

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

CVSS v3.1

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

CVSS v2.0

10.0 HIGHAV:N/AC:L/Au:N/C:C/I:C/A:C

EPSS

86.78% chance of exploitation in the next 30 days, 100th percentile

CISA KEV

added 2021-11-03

Nuclei

critical · CWE-787

Published

2021-05-07

Updated

2025-10-21

Proof-of-concept exploits (1)

• Yu3H0/IoT_CVE/tree/main/Tenda/CVE_3

Nuclei templates (1)

• projectdiscovery/nuclei-templates/blob/main/http/cves/2021/CVE-2021-31755.yaml

References

• CVE Record
• NVD entry

Related

• CVE-2021-31756
• CVE-2021-31757
• CVE-2021-31758
• CVE-2021-44622
• CVE-2021-44623
• CVE-2021-44625