Vulnerability · Published Sep 14, 2026 · Assigned by VulDB
CVE-2026-90689Tenda W20E formDelWebAuthWhiteUser stack-based overflow
High 8.8
In plain English
A high-severity stack buffer overflow in W20E from Tenda. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.9% (higher than 58% of all known vulnerabilities).
Severity (CVSS 3.1)8.8High
Exploit odds (30 days)0.9%top 41.5% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known
Official 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.
Affected products (as reported)
Weakness: CWE-121, CWE-119 · Vector: 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
References
- VDB-403222 | Tenda W20E formDelWebAuthWhiteUser stack-based overflow vdb-entry, technical-description
- VDB-403222 | CTI Indicators (IOB, IOC, IOA) signature, permissions-required
- CVE-2026-90689 | CVE Analysis and Report third-party-advisory
- Submit #914981 | Tenda Router US_W20EV4.0br_V15.11.0.61068_1546_841_CN_TDC Memory Corruption third-party-advisory
- https://github.com/Amalll-Sec/router-vulnerability-research/blob/main/advisories/Tenda/W20E/formDelWebAuthWhiteUser/README.md related
- https://www.tenda.com.cn/ product