CVE-2021-45391
A Buffer Overflow vulnerability exists in Tenda Router AX12 V22.03.01.21_CN in the sub_422CE4 function in the goform/setIPv6Status binary file /usr/sbin/httpd via the conType parameter, which causes a Denial of Service.
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (1.83%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
Description
A Buffer Overflow vulnerability exists in Tenda Router AX12 V22.03.01.21_CN in the sub_422CE4 function in the goform/setIPv6Status binary file /usr/sbin/httpd via the conType parameter, which causes a Denial of Service.
- CVSS 3.1
- 7.5 HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- EPSS
- 1.83% probability · 79th percentile
- Public exploits
- None in Exploit-DB
- CISA KEV
- Not listed
- Weakness
- CWE-787
- Affected
- tenda/ax12 firmware
- Source
- cve@mitre.org
EPSS 1.8% since 26 October 2026; no change recorded yet. Points are recorded when the score first appears and whenever it moves by a percentage point or more.
References
- http://tendawifi.com/index.htmlBroken Link
- https://github.com/sec-bin/IoT-CVE/tree/main/Tenda/AX12/1Exploit, Third Party Advisory
- https://www.tenda.com.cn/Vendor Advisory
- https://www.tenda.com.cn/product/AX12.htmlProduct, Vendor Advisory
- http://tendawifi.com/index.htmlBroken Link
- https://github.com/sec-bin/IoT-CVE/tree/main/Tenda/AX12/1Exploit, Third Party Advisory
- https://www.tenda.com.cn/Vendor Advisory
- https://www.tenda.com.cn/product/AX12.htmlProduct, Vendor Advisory
Source: NVD record, EPSS from FIRST.org, KEV from CISA, exploits from Exploit-DB. Refreshed daily. Download this record as JSON.