Stack-Based Buffer Overflow in Tenda W12 and i24 Products
CVE-2025-3820

8.7HIGH

Key Information:

Vendor
Tenda
Status
W12
I24
Vendor
CVE Published:
19 April 2025

Badges

👾 Exploit Exists🟡 Public PoC

Summary

A critical vulnerability has been identified in Tenda W12 and i24 products, specifically in the function cgiSysUplinkCheckSet located in /bin/httpd. This vulnerability allows for a stack-based buffer overflow upon manipulation of the arguments hostIp1 and hostIp2, potentially exposing the device to remote attacks. Given that the exploit has been made public, it poses a significant risk to users' network security and requires immediate attention and remediation to safeguard against potential exploitation.

Affected Version(s)

i24 3.0.0.4(2887)

i24 3.0.0.5(3644)

W12 3.0.0.4(2887)

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-2025-3820 - Proof of Concept

References

https://vuldb.com/?id.305726
vdb-entrytechnical-description
https://vuldb.com/?ctiid.305726
signaturepermissions-required
https://vuldb.com/?submit.555728
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

T1an (VulDB User)
.