Buffer Overflow Vulnerability in Tenda AC20 Router
CVE-2025-11385

8.7HIGH

Key Information:

Vendor

Tenda
Status
Ac20
Vendor
CVE Published:
7 October 2025

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2025-11385?

A buffer overflow vulnerability has been identified in the Tenda AC20 router, specifically within the sscanf function of the fast_setting_wifi_set file. This vulnerability can be exploited remotely by manipulating the timeZone argument, potentially allowing attackers to execute arbitrary code or cause a denial of service. The issue affects all versions of the Tenda AC20 router up to 16.03.08.12, and has been publicly disclosed, increasing the risk of exploitation.

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-2025-11385 - Proof of Concept

References

https://vuldb.com/?id.327312
vdb-entrytechnical-description
https://vuldb.com/?ctiid.327312
signaturepermissions-required
https://vuldb.com/?submit.664922
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

cymiao (VulDB User)
JSON
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CVE-2025-11385 : Buffer Overflow Vulnerability in Tenda AC20 Router