Tenda W20E Stack-Based Buffer Overflow Vulnerability
CVE-2026-90689

8.7HIGH

Key Information:

Vendor

Tenda
Status
W20e
Vendor
CVE Published:
14 September 2026

What is CVE-2026-90689?

A security vulnerability has been identified in the Tenda W20E router's function formDelWebAuthWhiteUser, which allows an attacker to manipulate the argument webAuthWhiteUserIndex. This manipulation can trigger a stack-based buffer overflow, potentially compromising the device. The attack can be executed remotely, emphasizing the need for immediate action to secure affected products.

Affected Version(s)

W20E 15.11.0.61068_1546_841_CN_TDC

References

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

CVSS V4

Score:
8.7
Severity:
HIGH
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Network
Attack Complexity:
Low
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
None

Timeline

  • Vulnerability published

  • Vulnerability Reserved

Credit

AmaIIl (VulDB User)
.