CVE-2021-31755

critical · 9.8Actively exploited

On the CISA Known Exploited Vulnerabilities catalog

Apply updates per vendor instructions.

Added 2021-11-03Remediation due 2021-11-17

A public exploit / detection template exists

Weaponised detection is publicly available, which meaningfully raises real-world risk regardless of CVSS. nuclei-templates →

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.

9.8

CVSS

86.9%

EPSS (exploit prob.)

100th

EPSS percentile

2021-05-07

Published

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

Weaknesses

CWE-787

Affected products

Vendor	Product	Affected versions
tenda	ac11_firmware	<= 02.03.01.104_cn
tenda	ac11	all versions

Check a specific version with /api/v1/cve/match.

References

https://github.com/Yu3H0/IoT_CVE/tree/main/Tenda/CVE_3
https://github.com/Yu3H0/IoT_CVE/tree/main/Tenda/CVE_3
https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2021-31755

Query this programmatically:

curl https://evil-db.io/api/v1/cve/CVE-2021-31755