Buffer Overflow Vulnerability in Tenda AC20 Router
CVE-2025-14655

8.7HIGH

Key Information:

Vendor

Tenda
Status
Ac20
Vendor
CVE Published:
14 December 2025

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2025-14655?

A security vulnerability has been identified in the Tenda AC20 router firmware version 16.03.08.12, specifically within the function formSetRebootTimer in the /goform/SetSysAutoRebbotCfg component of the httpd service. By manipulating the rebootTime argument, an attacker can exploit this flaw to perform a stack-based buffer overflow. This vulnerability allows remote attackers to execute arbitrary code, posing significant risks to users' network security. The exploit details have already been released publicly, highlighting the urgent need for users to secure their devices against potential attacks.

Affected Version(s)

AC20 16.03.08.12

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-2025-14655 - Proof of Concept

References

https://vuldb.com/?id.336388
vdb-entrytechnical-description
https://vuldb.com/?ctiid.336388
signaturepermissions-required
https://vuldb.com/?submit.712910
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

jiahui2888 (VulDB User)
JSON
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CVE-2025-14655 : Buffer Overflow Vulnerability in Tenda AC20 Router