Stack-Based Buffer Overflow in Tenda CH22 Router
CVE-2026-5156

8.7HIGH

Key Information:

Vendor

Tenda
Status
Ch22
Vendor
CVE Published:
30 March 2026

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2026-5156?

A vulnerability in the Tenda CH22 router version 1.0.0.1 has been identified, specifically within the 'formQuickIndex' function of the Parameter Handler component located at /goform/QuickIndex. This issue arises from manipulating the mit_linktype argument, leading to a stack-based buffer overflow. Malicious actors can exploit this vulnerability remotely, potentially compromising the device and the network it operates on. Users are advised to apply the latest updates and security patches to mitigate the risk of exploitation.

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-2026-5156 - Proof of Concept

References

https://vuldb.com/vuln/354188
vdb-entrytechnical-description
https://vuldb.com/vuln/354188/cti
signaturepermissions-required
https://vuldb.com/submit/780208
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

LtzHust2 (VulDB User)
.