Command Injection Vulnerability in Tenda CH22 Router
CVE-2026-77031

5.3MEDIUM

Key Information:

Vendor

Tenda
Status
Ch22
Vendor
CVE Published:
20 August 2026

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2026-77031?

A command injection vulnerability exists in the Tenda CH22 router, specifically within the function formcreateFileName of the file /goform/formcreateFileName. An attacker can manipulate the argument fileNameMit, enabling unauthorized execution of commands remotely. The potential for exploitation has become known to the public, highlighting significant security risks. Users of affected versions should take immediate action to mitigate these vulnerabilities.

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-2026-77031 - Proof of Concept

References

https://vuldb.com/vuln/393642
vdb-entrytechnical-description
https://vuldb.com/vuln/393642/cti
signaturepermissions-required
https://vuldb.com/cve/CVE-2026-77031
third-party-advisory

CVSS V4

Score:
5.3
Severity:
MEDIUM
Confidentiality:
Low
Integrity:
Low
Availability:
Low
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

ysnysn0121 (VulDB User)
.