Stack-Based Buffer Overflow in Tenda AC9 Router
CVE-2025-5847

8.7HIGH

Key Information:

Vendor

Tenda
Status
Ac9
Vendor
CVE Published:
8 June 2025

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2025-5847?

A vulnerability exists in the Tenda AC9 router, specifically within the function formSetSafeWanWebMan located in the file /goform/SetRemoteWebCfg. The issue arises due to improper handling of the argument remoteIp, leading to potential stack-based buffer overflow conditions. This flaw can be exploited remotely, allowing an attacker to manipulate device behavior. Public disclosure has raised concerns about the impact on security, making immediate attention to this vulnerability critical for safeguarding devices.

Affected Version(s)

AC9 15.03.02.13

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-2025-5847 - Proof of Concept

References

https://vuldb.com/?id.311593
vdb-entrytechnical-description
https://vuldb.com/?ctiid.311593
signaturepermissions-required
https://vuldb.com/?submit.591362
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

ysnysnysn (VulDB User)
.
CVE-2025-5847 : Stack-Based Buffer Overflow in Tenda AC9 Router