Vulnerability details

CVE-2026-90689

Tenda W20E

Tenda W20E formDelWebAuthWhiteUser stack-based overflow

CVSS 4.0

8.7High

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.

CVSS scores

Score	Version	Source	Vector
8.7High	4.0	CVEProject cvelistV5 (CNA) (VulDB)	`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`
8.8High	3.1	CVEProject cvelistV5 (CNA) (VulDB)	`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`
8.8High	3.0	CVEProject cvelistV5 (CNA) (VulDB)	`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`
9.0High	2.0	CVEProject cvelistV5 (CNA) (VulDB)	`AV:N/AC:L/Au:S/C:C/I:C/A:C/E:ND/RL:ND/RC:UR`

Affected products

Vendor	Product	Versions	Source
Tenda	W20E	15.11.0.61068_1546_841_CN_TDC	CVEProject cvelistV5 (CNA)

References and advisories

https://vuldb.com/vuln/403222 vdb-entrytechnical-description
https://vuldb.com/vuln/403222/cti signaturepermissions-required
https://vuldb.com/cve/CVE-2026-90689 third-party-advisory
https://vuldb.com/submit/914981 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

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Details

Published: 2026-09-14
Last updated: 2026-09-14
State: Published
Assigner (CNA): VulDB

Exploit prediction (EPSS)

0.85%

Probability of exploitation in 30 days

58.4%

Percentile (among all CVEs)

SSVC assessment (CISA)

Automatable: No
Exploitation: None
Technical impact: Total

Weaknesses (CWE)

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