Stack-Based Buffer Overflow in Tenda AC15 Router
CVE-2026-5830

8.7HIGH

Key Information:

Vendor

Tenda
Status
Ac15
Vendor
CVE Published:
9 April 2026

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2026-5830?

A stack-based buffer overflow vulnerability exists in the Tenda AC15 router, specifically in the websGetVar function within the SysToolChangePwd endpoint. Attackers can manipulate password parameters such as oldPwd, newPwd, and cfmPwd, potentially leading to unauthorized code execution. The exploit is publicly available, making it essential for users to implement security measures to safeguard their devices.

Affected Version(s)

AC15 15.03.05.18

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-2026-5830 - Proof of Concept

References

https://vuldb.com/vuln/356277
vdb-entrytechnical-description
https://vuldb.com/vuln/356277/cti
signaturepermissions-required
https://vuldb.com/submit/789178
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

meshaal (VulDB User)
.