Buffer Overflow Vulnerability in Tenda AC23 Router
CVE-2025-11356

8.7HIGH

Key Information:

Vendor

Tenda
Status
Ac23
Vendor
CVE Published:
7 October 2025

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2025-11356?

A remote buffer overflow vulnerability affects Tenda AC23 routers, specifically in the sscanf function located in /goform/SetStaticRouteCfg. The flaw allows attackers to manipulate the argument list, potentially leading to unauthorized access or control of the device. This vulnerability is publicly known and poses significant risks if not addressed. Users are advised to update their firmware to mitigate this threat.

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Deploy the Patch

Affected Version(s)

AC23 16.03.07.0

AC23 16.03.07.1

AC23 16.03.07.2

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-2025-11356 - Proof of Concept

References

https://vuldb.com/?id.327241
vdb-entrytechnical-description
https://vuldb.com/?ctiid.327241
signaturepermissions-required
https://vuldb.com/?submit.664923
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)
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