Stack-Based Buffer Overflow in Tenda CH22 Router by Tenda
CVE-2026-5604

8.7HIGH

Key Information:

Vendor

Tenda
Status
Ch22
Vendor
CVE Published:
5 April 2026

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2026-5604?

A security flaw has been identified in the Tenda CH22 router, specifically within the formCertLocalPrecreate function located in the /goform/CertLocalPrecreate file. This vulnerability can lead to a stack-based buffer overflow when the 'standard' argument is manipulated. The implications of this flaw are severe, allowing for potential remote exploitation. Code aimed at exploiting this vulnerability has already been made publicly available, posing significant risks to users of the affected product.

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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-2026-5604 - Proof of Concept

References

https://vuldb.com/vuln/355396
vdb-entrytechnical-description
https://vuldb.com/vuln/355396/cti
signaturepermissions-required
https://vuldb.com/submit/785032
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

LtzHuster (VulDB User)
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