Buffer Overflow Vulnerability in Tenda CH22 Router
CVE-2025-13400

8.7HIGH

Key Information:

Vendor

Tenda
Status
Ch22
Vendor
CVE Published:
19 November 2025

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2025-13400?

A buffer overflow vulnerability exists in the function formWrlExtraGet of Tenda CH22 routers. This flaw, present in the file /goform/WrlExtraGet, can be exploited via manipulation of the argument chkHz, allowing for potential remote code execution. As the exploit is now public, urgent action is recommended to mitigate risks associated with this vulnerability.

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Affected Version(s)

CH22 1.0.0.1

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-2025-13400 - Proof of Concept

References

https://vuldb.com/?id.332926
vdb-entrytechnical-description
https://vuldb.com/?ctiid.332926
signaturepermissions-required
https://vuldb.com/?submit.692145
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

Li Hu (VulDB User)
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