Vulnerability · Published Jun 8, 2026 · Assigned by VulDB
CVE-2026-11523Tenda W20E Web Management PortalAuth formPortalAuth stack-based overflow
High 8.8
In plain English
A high-severity stack buffer overflow in W20E from Tenda. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.5% (higher than 41% of all known vulnerabilities).
Severity (CVSS 3.1)8.8High
Exploit odds (30 days)0.5%top 59.5% of all CVEs
Exploited in the wildNo reportsCISA SSVC: poc
Attack toolingNoneno public tooling known
Official description
A flaw has been found in Tenda W20E 15.11.0.6. This issue affects the function formPortalAuth of the file /goform/PortalAuth of the component Web Management Interface. Executing a manipulation of the argument gotoUrl can lead to stack-based buffer overflow. The attack can be launched remotely. The exploit has been published and may be used.
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:P/RL:X/RC:R
References
- VDB-369143 | Tenda W20E Web Management PortalAuth formPortalAuth stack-based overflow vdb-entry, technical-description
- VDB-369143 | CTI Indicators (IOB, IOC, IOA) signature, permissions-required
- CVE-2026-11523 | CVE Analysis and Report third-party-advisory
- Submit #836471 | Tenda W20E Enterprise Router V15.11.0.6 Stack-based Buffer Overflow third-party-advisory
- https://github.com/Robots10/IoT_vlu/blob/main/reports/Tenda/formPortalAuth/formPortalAuth.md exploit
- https://www.tenda.com.cn/ product