Stack-Based Buffer Overflow in Tenda JD12L Router
CVE-2026-13515

8.7HIGH

Key Information:

Vendor

Tenda
Status
Jd12l
Vendor
CVE Published:
28 June 2026

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2026-13515?

A security vulnerability has been identified in the Tenda JD12L router, specifically within the function formSetPPTPServer located in the /goform/SetPptpServerCfg file. This vulnerability arises from improper handling of the argument startIp, resulting in a stack-based buffer overflow. Attackers could exploit this weakness remotely, executing unauthorized code or causing the system to behave unpredictably. Since details of the exploit have been publicly disclosed, it is essential for users to take preventive measures to mitigate potential risks.

Affected Version(s)

JD12L 16.03.53.23

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-2026-13515 - Proof of Concept

References

https://vuldb.com/vuln/374523
vdb-entrytechnical-description
https://vuldb.com/vuln/374523/cti
signaturepermissions-required
https://vuldb.com/cve/CVE-2026-13515
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

Vampirensa (VulDB User)
.