HOMEVULNERABILITIESCVE-2021-30166
HIGH

CVE-2021-30166

CWE-78Published: April 28, 2021· Updated: Jun 17, 2026

7.2
CVSS v3.1

Official Description

The NTP Server configuration function of the IP camera device is not verified with special parameters. Remote attackers can perform a command Injection attack and execute arbitrary commands after logging in with the privileged permission.

NVD Source

Technical Analysis

CVE-2021-30166 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

Exploitation requires high privileges, which limits the exposure to scenarios where an attacker has already gained initial access.

A successful exploit results in complete confidentiality breach (data exposure), full integrity compromise (data manipulation), availability disruption (denial of service), with a CVSS base score of 7.2.

CVSS v3.1 Vector Breakdown

Exploitability
Attack VectorNetwork
Attack ComplexityLow
Privileges Req.High
User InteractionNone
ScopeUnchanged
Impact
ConfidentialityHigh
IntegrityHigh
AvailabilityHigh
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H

Affected Vendors & Products

meritlilin82 product(s)
p2r8852e2 firmwarep2r8852e2p2r8852e4 firmwarep2r8852e4p2r6852e2 firmwarep2r6852e2p2r6852e4 firmwarep2r6852e4p2r6552e2 firmwarep2r6552e2p2r6552e4 firmwarep2r6552e4+70
Source: NVD CPE · 82 total CPE entries

Exploit & PoC Resources

NO KNOWN EXPLOITNo public exploit confirmed at this time
Exploit-DB
Offensive Security exploit database
GitHub PoC Search
Community PoC repositories
Rapid7 / Metasploit
Metasploit module search
PacketStorm
Security advisories & exploits
NVD Detail
Official NIST entry
MITRE CVE
CVE Program entry
External links open in a new tab. Always verify in a controlled environment before use.

Official Patches & Advisories

ADVISORYhttps://gist.github.com/keniver/86ebef688fb274b534da51ef1a84dd3e
ADVISORYhttps://www.chtsecurity.com/news/0b733a38-e616-4ff3-86a6-13e710643388
ADVISORYhttps://www.meritlilin.com/assets/uploads/support/file/M00166-TW.pdf
ADVISORYhttps://www.twcert.org.tw/tw/cp-132-4676-391a5-1.html
ADVISORYhttps://gist.github.com/keniver/86ebef688fb274b534da51ef1a84dd3e
ADVISORYhttps://www.chtsecurity.com/news/0b733a38-e616-4ff3-86a6-13e710643388
ADVISORYhttps://www.meritlilin.com/assets/uploads/support/file/M00166-TW.pdf
ADVISORYhttps://www.twcert.org.tw/tw/cp-132-4676-391a5-1.html

All References (8)

→
https://gist.github.com/keniver/86ebef688fb274b534da51ef1a84dd3eThird Party Advisory
→
https://www.chtsecurity.com/news/0b733a38-e616-4ff3-86a6-13e710643388Third Party Advisory
→
https://www.meritlilin.com/assets/uploads/support/file/M00166-TW.pdfVendor Advisory
→
https://www.twcert.org.tw/tw/cp-132-4676-391a5-1.htmlThird Party Advisory
→
https://gist.github.com/keniver/86ebef688fb274b534da51ef1a84dd3eThird Party Advisory
→
https://www.chtsecurity.com/news/0b733a38-e616-4ff3-86a6-13e710643388Third Party Advisory
→
https://www.meritlilin.com/assets/uploads/support/file/M00166-TW.pdfVendor Advisory
→
https://www.twcert.org.tw/tw/cp-132-4676-391a5-1.htmlThird Party Advisory

Quick Facts

CVE IDCVE-2021-30166
CVSS Score7.2 / 10
SeverityHIGH
WeaknessCWE-78
CISA KEVNo
Affected1 vendor(s)
PublishedApr 28, 2021

Related CVEs (CWE-78)

CVE-2022-33194
10.0
CVE-2016-10043
10.0
CVE-2022-33192
10.0
CVE-2022-33193
10.0
CVE-2022-33195
10.0
CVE-2017-14459
10.0

Recommended Actions

  • →Apply vendor patches immediately
  • →Monitor CVE-2021-30166 in threat intel feeds
  • →Review IDS/IPS signatures for exploitation attempts
Data sourced from NVD (NIST), CISA KEV, and EPSS (FIRST). Analysis generated by CTIWatch. CVE data is provided under the NVD usage policy.
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