High severity · published Sep 14, 2026
CVE-2026-90689
Tenda W20E formDelWebAuthWhiteUser stack-based overflow
8.8
CVSS
0.9%
EPSS
No
On KEV
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.
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)0.9% · higher than 58% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
W2
W20E · Tenda
15.11.0.61068_1546_841_CN_TDC · source: vendor
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-90689
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-90689
github.com
https://github.com/Amalll-Sec/router-vulnerability-research/blob/main/advisories/Tenda/W20E/formDelWebAuthWhiteUser/README.md
vuldb.com
https://vuldb.com/cve/CVE-2026-90689
vuldb.com
https://vuldb.com/submit/914981
vuldb.com
https://vuldb.com/vuln/403222
vuldb.com
https://vuldb.com/vuln/403222/cti
www.tenda.com.cn
https://www.tenda.com.cn/
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