Stack-Based Buffer Overflow in Tenda JD12L Router
CVE-2026-13517

8.7HIGH

Key Information:

Vendor

Tenda
Status
Jd12l
Vendor
CVE Published:
29 June 2026

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2026-13517?

A critical vulnerability exists in the Tenda JD12L router where the function formWifiBasicSet, located in /goform/WifiBasicSet, is susceptible to a stack-based buffer overflow due to improper handling of the security_5g argument. This flaw allows attackers to execute a remote exploit, potentially compromising the device's integrity and security. Users are advised to patch their devices promptly to mitigate the risk associated with this vulnerability.

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-2026-13517 - Proof of Concept

References

https://vuldb.com/vuln/374525
vdb-entrytechnical-description
https://vuldb.com/vuln/374525/cti
signaturepermissions-required
https://vuldb.com/cve/CVE-2026-13517
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)
.