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Vulnerability record · CVE-2021-45392 · published 14 February 2022

CVE-2021-45392: Tenda ax12 firmware out-of-bounds write vulnerability

Tenda · Ax12 Firmware

A Buffer Overflow vulnerability exists in Tenda Router AX12 V22.03.01.21_CN in the sub_422CE4 function in page /goform/setIPv6Status via the prefixDelegate parameter, which causes a Denial of Service.

7.5 CVSS 3.1 High EPSS 12% · top 3.9% CWE-787 · Out-of-bounds write
7.5CVSS 3.1 base score, v2 7.8
12%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
8References, 2 tagged exploit
17 Jun 2026Last modified by NVD

Description

A Buffer Overflow vulnerability exists in Tenda Router AX12 V22.03.01.21_CN in the sub_422CE4 function in page /goform/setIPv6Status via the prefixDelegate parameter, which causes a Denial of Service.

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

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
http://tendawifi.com/index.html Broken Link
https://github.com/sec-bin/IoT-CVE/tree/main/Tenda/AX12/2 ExploitThird Party Advisory
https://www.tenda.com.cn/ Vendor Advisory
https://www.tenda.com.cn/product/AX12.html ProductVendor Advisory
http://tendawifi.com/index.html Broken Link
https://github.com/sec-bin/IoT-CVE/tree/main/Tenda/AX12/2 ExploitThird Party Advisory
https://www.tenda.com.cn/ Vendor Advisory
https://www.tenda.com.cn/product/AX12.html ProductVendor Advisory

Track CVE-2021-45392 inside VULONE

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

9.8CVE-2024-28383Tenda ax12 firmware stack-based buffer overflow vulnerabilityTenda AX12 v1.0 v22.03.01.16 was discovered to contain a stack overflow via the ssid parameter in the sub_431CF0 function.EPSS 0.82%9.8CVE-2023-49425Tenda ax12 firmware out-of-bounds write vulnerabilityTenda AX12 V22.03.01.46 was discovered to contain a stack overflow via the deviceList parameter at /goform/setMacFilterCfg .EPSS 0.92%9.8CVE-2023-49426Tenda ax12 firmware out-of-bounds write vulnerabilityTenda AX12 V22.03.01.46 was discovered to contain a stack overflow via the list parameter at /goform/SetStaticRouteCfg.EPSS 0.92%9.8CVE-2023-49428Tenda ax12 firmware command injection vulnerabilityTenda AX12 V22.03.01.46 has been discovered to contain a command injection vulnerability in the 'mac' parameter at /goform/SetOnlineDevName.EPSS 2.5%9.8CVE-2023-49437Tenda ax12 firmware command injection vulnerabilityTenda AX12 V22.03.01.46 has been discovered to contain a command injection vulnerability in the 'list' parameter at /goform/SetNetControlList.EPSS 2.4%9.8CVE-2023-49424Tenda ax12 firmware out-of-bounds write vulnerabilityTenda AX12 V22.03.01.46 was discovered to contain a stack overflow via the list parameter at /goform/SetVirtualServerCfg.EPSS 0.92%9.8CVE-2022-45995Tenda ax12 firmware classic buffer overflow vulnerabilityThere is an unauthorized buffer overflow vulnerability in Tenda AX12 v22.03.01.21 _ cn. This vulnerability can cause the web service not to restart o…EPSS 1.1%9.8CVE-2022-28082Tenda ax12 firmware out-of-bounds write vulnerabilityTenda AX12 v22.03.01.21_CN was discovered to contain a stack overflow via the list parameter at /goform/SetNetControlList.EPSS 8.9%

Source: NIST National Vulnerability Database (record CVE-2021-45392), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.