Stack-based Buffer Overflow Vulnerability in Tenda W20E Router
CVE-2026-11522

8.7HIGH

Key Information:

Vendor

Tenda
Status
W20e
Vendor
CVE Published:
8 June 2026

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2026-11522?

A security flaw has been identified in the Tenda W20E router version 15.11.0.6, specifically in the formSetPortMirror function of the /goform/setPortMirror file. This vulnerability can be exploited remotely through a crafted payload to manipulate the portMirrorMirroredPorts argument, leading to a stack-based buffer overflow. The successful execution of this exploit can compromise the device's security and integrity.

Affected Version(s)

W20E 15.11.0.6

Exploit Proof of Concept (PoC)

PoC code is written by security researchers to demonstrate the vulnerability can be exploited. PoC code is also a key component for weaponization which could lead to ransomware.

CVE-2026-11522 - Proof of Concept

References

https://vuldb.com/vuln/369142
vdb-entrytechnical-description
https://vuldb.com/vuln/369142/cti
signaturepermissions-required
https://vuldb.com/cve/CVE-2026-11522
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

  • 🟡

    Public PoC available

  • 👾

    Exploit known to exist

  • Vulnerability published

  • Vulnerability Reserved

Credit

hacker128 (VulDB User)
.