CVE-2026-90689
HighCVSS 8.8Exploitation Probability (EPSS)
Low risk47th percentile - higher than 47% of all known CVEs
Summary
A security flaw has been discovered in Tenda W20E 15.11.0.61068_1546_841_CN_TDC in the formDelWebAuthWhiteUser function. Manipulation of the webAuthWhiteUserIndex argument results in a stack-based buffer overflow. The attack can be initiated remotely.
Risk Assessment
A stack-based buffer overflow may allow arbitrary code execution or cause a device crash. The remote nature of the attack increases the risk.
Recommendation
Update Tenda W20E firmware to a version that fixes this vulnerability. Until then, restrict access to the management interface.
Other vulnerabilities in Tenda W20E
See all- CVE-2026-67967Critical
A buffer overflow vulnerability in Tenda W20E V16.01.0.6(2782) allows an attacker to execute arbitrary code. This is an incomplete fix for CVE-2025-44867 and CVE-2026-36819.
- CVE-2026-67966Critical
The /goform/telnet endpoint in Tenda W20E V16.01.0.6(2782) allows unauthenticated remote attackers to activate the Telnet daemon and obtain root shell access.
- CVE-2026-67965Critical
An issue in Tenda W20E v.16.01.0.6(2782) allows a remote attacker to execute arbitrary code via the url_need_login function.
- CVE-2026-90688Medium
In Tenda W20E 15.11.0.61068_1546_841_CN_TDC, the formIPMacBindAdd function of the HTTP Handler component mishandles the IPMacBindRule argument, leading to a stack-based buffer overflow. The attack can be launched remotely.
- CVE-2026-19824High
A stack-based buffer overflow vulnerability was identified in Tenda W20E 15.11.0.6(1068_1546_841)_CN_TDC in the ipMacBindListStore function of /goform/addIpMacBind. Manipulating the IPMacBindRule argument can lead to buffer overflow. The attack can be executed remotely, and the exploit is publicly available.
- CVE-2026-19823High
A stack-based buffer overflow vulnerability was discovered in Tenda W20E 15.11.0.6(1068_1546_841)_CN_TDC in the formQOSRuleDel function of /goform/delQos. Manipulating the qosIndex argument results in buffer overflow. The attack can be executed remotely, and the exploit is publicly available.
- CVE-2026-19822High
A vulnerability was identified in Tenda W20E 15.11.0.6(1068_1546_841)_CN_TDC. The function lstAdd of the file /goform/editQos in the QoS Edit component is affected. Manipulation of the argument qosListConnecttedNum leads to stack-based buffer overflow. The attack may be launched remotely, and the exploit is publicly available.
- CVE-2026-36823High
A buffer overflow vulnerability was discovered in the webAuthUserInfo parameter of the formAddWebAuthUser function in Tenda W20E router version 15.11.0.6. Attackers can cause a Denial of Service (DoS) via a crafted HTTP request.
- CVE-2026-36822High
A buffer overflow vulnerability was discovered in the macAddr parameter of the formDelStaState function in Tenda W20E router version 15.11.0.6. Attackers can cause a Denial of Service (DoS) via a crafted HTTP request.
- CVE-2026-36821High
A buffer overflow vulnerability was discovered in the picCropName parameter of the formCropAndSetWewifiPic function in Tenda W20E router version 15.11.0.6. Attackers can cause a Denial of Service (DoS) via a crafted HTTP request.
Original NVD description (English source)
A security flaw has been discovered in Tenda W20E 15.11.0.61068_1546_841_CN_TDC. Impacted is the function formDelWebAuthWhiteUser. Performing a manipulation of the argument webAuthWhiteUserIndex results in stack-based buffer overflow. The attack can be initiated remotely.
Vulnerability data from NVD (NIST) · CISA KEV · EPSS