Buffer Overflow Vulnerability in Tenda AC5 Router
CVE-2025-5863

8.7HIGH

Key Information:

Vendor

Tenda
Status
Ac5
Vendor
CVE Published:
9 June 2025

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2025-5863?

A vulnerability exists in the Tenda AC5 router that allows an attacker to exploit a stack-based buffer overflow through the formSetRebootTimer function. This issue arises from improper handling of the rebootTime argument in the /goform/SetRebootTimer file. As a result, remote attackers can potentially execute arbitrary code, posing significant security risks to the device and its network. The exploit has already been disclosed, making it crucial for users to take immediate action to secure their devices against potential attacks.

Affected Version(s)

AC5 15.03.06.47

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-2025-5863 - Proof of Concept

References

https://vuldb.com/?id.311622
vdb-entrytechnical-description
https://vuldb.com/?ctiid.311622
signaturepermissions-required
https://vuldb.com/?submit.591981
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_miemie (VulDB User)
.
CVE-2025-5863 : Buffer Overflow Vulnerability in Tenda AC5 Router