Buffer Overflow in Tenda AC20 Router HTTP POST Handler
CVE-2025-10815

8.7HIGH

Key Information:

Vendor

Tenda
Status
Ac20
Vendor
CVE Published:
22 September 2025

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2025-10815?

A vulnerability has been detected in the Tenda AC20 router due to improper handling of input in the HTTP POST request function 'SetPptpServerCfg'. This flaw allows a remote attacker to manipulate arguments, specifically 'startIp', leading to a buffer overflow condition. Exploiting this vulnerability could potentially allow unauthorized access and control over the device, as the exploit is publicly available. Users are advised to update their firmware or implement security measures to mitigate risks.

Affected Version(s)

AC20 16.03.08.0

AC20 16.03.08.1

AC20 16.03.08.2

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-2025-10815 - Proof of Concept

References

https://vuldb.com/?id.325173
vdb-entrytechnical-description
https://vuldb.com/?ctiid.325173
signaturepermissions-required
https://vuldb.com/?submit.654460
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

Juana_2u (VulDB User)
.
CVE-2025-10815 : Buffer Overflow in Tenda AC20 Router HTTP POST Handler