CVE-2026-90688
MediumCVSS 6.5Exploitation Probability (EPSS)
Low risk33th percentile - higher than 33% of all known CVEs
Summary
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.
Risk Assessment
A remote attacker can trigger a stack-based buffer overflow, potentially leading to device crash or possibly arbitrary code execution and router compromise.
Recommendation
Upgrade Tenda W20E firmware to a version containing the fix or, if unavailable, restrict access to the management interface and consider replacing the device.
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-2026-90689High
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.
- 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 vulnerability was identified in Tenda W20E 15.11.0.61068_1546_841_CN_TDC. This issue affects the function formIPMacBindAdd of the component HTTP Handler. Such manipulation of the argument IPMacBindRule leads to stack-based buffer overflow. It is possible to launch the attack remotely.
Vulnerability data from NVD (NIST) · CISA KEV · EPSS