Stack-Based Buffer Overflow Vulnerability in Tenda AC5 Router
CVE-2025-6886

8.7HIGH

Key Information:

Vendor

Tenda
Status
Ac5
Vendor
CVE Published:
30 June 2025

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2025-6886?

A stack-based buffer overflow vulnerability has been identified in the Tenda AC5 router, particularly within the openSchedWifi function associated with the arguments schedStartTime and schedEndTime. This flaw allows an attacker to manipulate these arguments, potentially leading to a denial of service or remote code execution. The vulnerability can be exploited remotely, making it a significant risk for users of the affected router model. Users are advised to monitor their devices for updates and apply necessary patches to mitigate the risks.

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-2025-6886 - Proof of Concept

References

https://vuldb.com/?id.314365
vdb-entrytechnical-description
https://vuldb.com/?ctiid.314365
signaturepermissions-required
https://vuldb.com/?submit.603774
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

wxhwxhwxh_ (VulDB User)
.
CVE-2025-6886 : Stack-Based Buffer Overflow Vulnerability in Tenda AC5 Router