Stack-Based Buffer Overflow in Tenda AC6 Router
CVE-2025-5853

8.7HIGH

Key Information:

Vendor

Tenda
Status
Ac6
Vendor
CVE Published:
9 June 2025

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2025-5853?

A stack-based buffer overflow vulnerability has been identified in the formSetSafeWanWebMan function of Tenda AC6 routers. This weakness exists due to improper validation of the 'remoteIp' argument within the /goform/SetRemoteWebCfg file. When exploited, it allows attackers to execute arbitrary code remotely, which poses a significant risk to the security of the affected devices. As this vulnerability has been publicly disclosed, it is imperative for users to update their firmware to mitigate potential attacks.

Affected Version(s)

AC6 15.03.05.16

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-2025-5853 - Proof of Concept

References

https://vuldb.com/?id.311599
vdb-entrytechnical-description
https://vuldb.com/?ctiid.311599
signaturepermissions-required
https://vuldb.com/?submit.591419
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

yhryhryhr_tu (VulDB User)
.
CVE-2025-5853 : Stack-Based Buffer Overflow in Tenda AC6 Router