Buffer Overflow Vulnerability in Tenda TX9 Wi-Fi Settings Function
CVE-2026-2139

8.7HIGH

Key Information:

Vendor

Tenda
Status
Tx9
Vendor
CVE Published:
8 February 2026

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2026-2139?

A buffer overflow vulnerability exists in the Tenda TX9 device, specifically in the function responsible for configuring Wi-Fi settings. This flaw is triggered when an attacker manipulates the 'ssid' parameter in the '/goform/fast_setting_wifi_set' file. The vulnerability allows for potential remote execution of arbitrary code, thereby compromising the security of the device. Publicly available exploit codes further exacerbate the risk, indicating an urgent need for users to apply patches and ensure their devices are updated to safeguard against unauthorized access.

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Affected Version(s)

TX9 22.03.02.10_multi

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-2026-2139 - Proof of Concept

References

https://vuldb.com/?id.344774
vdb-entrytechnical-description
https://vuldb.com/?ctiid.344774
signaturepermissions-required
https://vuldb.com/?submit.747250
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

kdb3169 (VulDB User)
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