High severity · published Jun 8, 2026
CVE-2026-11523
Tenda W20E Web Management PortalAuth formPortalAuth stack-based overflow
8.8
CVSS
0.5%
EPSS
No
On KEV
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.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Attack vector
Network
Complexity
Low
Privileges
Low
User interaction
None
Confidentiality
High
Integrity
High
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.5% · higher than 40% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
W2
W20E · Tenda
15.11.0.6 · source: vendor
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-11523
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-11523
github.com
https://github.com/Robots10/IoT_vlu/blob/main/reports/Tenda/formPortalAuth/formPortalAuth.md
vuldb.com
https://vuldb.com/cve/CVE-2026-11523
vuldb.com
https://vuldb.com/submit/836471
vuldb.com
https://vuldb.com/vuln/369143
vuldb.com
https://vuldb.com/vuln/369143/cti
www.tenda.com.cn
https://www.tenda.com.cn/
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