CVE-2022-21178

Unauthenticated command execution via unescaped node serial

Published Aug 5, 2022 · Updated Apr 15, 2025

OS command injection in TCL LINKHUB Mesh Wi-Fi AC1200 MS1G_00_01.00_14 allows remote attackers to execute arbitrary commands via port 9003. The ucloud_add_node_new handler inserts the packet-controlled serialNumMd5 field into an echo command with sprintf and executes it through doSystemCmd without escaping. An attacker on the router's Wi-Fi network can reach the protobuf service without meaningful authentication and run shell commands on the appliance.

CVSS severity9.6
Critical
EPSS probability3.75%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

OS command injection in TCL LINKHUB Mesh Wi-Fi AC1200 MS1G_00_01.00_14 allows remote attackers to execute arbitrary commands via port 9003. The ucloud_add_node_new handler inserts the packet-controlled serialNumMd5 field into an echo command with sprintf and executes it through doSystemCmd without escaping. An attacker on the router's Wi-Fi network can reach the protobuf service without meaningful authentication and run shell commands on the appliance.

The record

CVE
CVE-2022-21178
Published
Aug 5, 2022
Updated
Apr 15, 2025
Vendor
TCL
Product
TCL LINKHUB Mesh Wi-Fi AC1200
Classifications
CWE-78, T1059.004
Attack vector
adjacent
Privileges
unauthenticated

Timeline

How it unfolded

  1. Aug 5, 2022CVE publishedPublication date reported by the CVE source.
  2. Apr 15, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=MS1G_00_01.00_14

What conditions does exploitation require?

Attack vectoradjacent
Required privilegesunauthenticated

What is affected?

TCL · TCL LINKHUB Mesh Wi-Fi AC1200version=MS1G_00_01.00_14

Published CVSS scores

9.6Cisco TalosCVSS:3.0/AV:A/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H
9.8NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectoradjacent
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-78Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')
T1059.004Unix Shell

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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