Stack-Based Buffer Overflow in Tenda DAP-1520 Authentication Handler
CVE-2025-4356

8.7HIGH

Key Information:

Vendor

Tenda
Status
Dap-1520
Vendor
CVE Published:
6 May 2025

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2025-4356?

A stack-based buffer overflow vulnerability exists in the authentication handler of the Tenda DAP-1520 device. This flaw occurs within the mod_graph_auth_uri_handler function, allowing remote attackers to exploit the vulnerability by sending specially crafted requests. If successful, the attacker can execute arbitrary code, potentially compromising the affected device's integrity and access to sensitive functions. This vulnerability has been publicly acknowledged, increasing the urgency for affected users to apply mitigation measures.

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Affected Version(s)

DAP-1520 1.10B04_BETA02

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-2025-4356 - Proof of Concept

References

https://vuldb.com/?id.307474
vdb-entrytechnical-description
https://vuldb.com/?ctiid.307474
signaturepermissions-required
https://vuldb.com/?submit.564722
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

duojie_0x00 (VulDB User)
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