Stack-based Buffer Overflow in Tenda AC6 Router
CVE-2025-5855

8.7HIGH

Key Information:

Vendor

Tenda
Status
Ac6
Vendor
CVE Published:
9 June 2025

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2025-5855?

A stack-based buffer overflow vulnerability has been identified in the Tenda AC6 router, specifically within the formSetRebootTimer function located in the /goform/SetRebootTimer file. This vulnerability allows attackers to manipulate the rebootTime argument, potentially leading to remote execution of arbitrary code. The vulnerability has been publicly disclosed, increasing the risk of exploitation. Users are advised to promptly implement security updates and mitigate the risk associated with this critical security flaw.

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-2025-5855 - Proof of Concept

References

https://vuldb.com/?id.311601
vdb-entrytechnical-description
https://vuldb.com/?ctiid.311601
signaturepermissions-required
https://vuldb.com/?submit.591422
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_backup (VulDB User)
.
CVE-2025-5855 : Stack-based Buffer Overflow in Tenda AC6 Router