CVE-2026-90689

Tenda W20E formDelWebAuthWhiteUser stack-based overflow

State: Published
Severity: 8.7 High
Published: Sep 14, 2026
Updated: Sep 14, 2026
Reserved: Sep 13, 2026

Description

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.

Scores

CVSS	Score	Vector	Source
4.0	8.7 High	CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X	VulDB
3.1	8.8 High	CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:X/RL:X/RC:R	VulDB
3.0	8.8 High	CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:X/RL:X/RC:R	VulDB
2.0	9.0 High	AV:N/AC:L/Au:S/C:C/I:C/A:C/E:ND/RL:ND/RC:UR	VulDB

Weaknesses

CWE-121 Stack-based Buffer Overflow
CWE-119 Memory Corruption

Affected Products

Product	Versions
W20ETenda	15.11.0.61068_1546_841_CN_TDCAffected

References

VDB-403222 | Tenda W20E formDelWebAuthWhiteUser stack-based overflowvdb-entrytechnical-description
VDB-403222 | CTI Indicators (IOB, IOC, IOA)signaturepermissions-required
CVE-2026-90689 | CVE Analysis and Reportthird-party-advisory
Submit #914981 | Tenda Router US_W20EV4.0br_V15.11.0.61068_1546_841_CN_TDC Memory Corruptionthird-party-advisory
https://github.com/Amalll-Sec/router-vulnerability-research/blob/main/advisories/Tenda/W20E/formDelWebAuthWhiteUser/README.mdrelated
https://www.tenda.com.cn/product

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