CVE-2021-30166Network attack vector

Root command execution via NTP server input

Published Apr 28, 2021 · Updated Sep 17, 2024

OS command injection in Merit LILIN P2/Z2/P3/Z3 IP Camera Firmware 7.1.94.8908 and earlier allows remote authenticated users to execute commands. The user-defined NTP server field in the system timer settings accepts special shell characters without neutralization before invoking an operating-system command. Administrator access is required, and injected commands run with root privileges, enabling full control of the camera and malware installation.

CVSS severity7.2
High
EPSS probability3.79%
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 Merit LILIN P2/Z2/P3/Z3 IP Camera Firmware 7.1.94.8908 and earlier allows remote authenticated users to execute commands. The user-defined NTP server field in the system timer settings accepts special shell characters without neutralization before invoking an operating-system command. Administrator access is required, and injected commands run with root privileges, enabling full control of the camera and malware installation.

The record

CVE
CVE-2021-30166
Published
Apr 28, 2021
Updated
Sep 17, 2024
Vendor
Merit LILIN Ent. Co., Ltd.
Product
P2/Z2/P3/Z3 IP Camera Firmware
Classifications
CWE-78, T1059
Attack vector
network
Privileges
admin

Timeline

How it unfolded

  1. Apr 28, 2021CVE publishedPublication date reported by the CVE source.
  2. Sep 17, 2024Record 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=unspecified <=7.1.94.8908

What conditions does exploitation require?

Attack vectornetwork
Required privilegesadmin

What is affected?

Merit LILIN Ent. Co., Ltd. · P2/Z2/P3/Z3 IP Camera Firmwareversion=unspecified <=7.1.94.8908

Published CVSS scores

7.2TWCERT/CCCVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
9.0NIST NVDAV:N/AC:L/Au:S/C:C/I:C/A:C

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)
Vectornetwork
Privilegesadmin
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-78Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')
T1059Command and Scripting Interpreter

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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