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CVE-2021-30167

29
FAUCET Score

CVE-2021-30167 describes a critical vulnerability in meritlilin network camera devices, where authenticated remote attackers can manipulate URL parameters to alter user information and escalate privileges, gaining full control over the devices. With a CVSS score of 9.8 (Critical), this vulnerability has a network attack vector, low attack complexity, and high impact on confidentiality, integrity, and availability. While no public exploit code or active exploitation has been observed, and community discussion is minimal, the high FAUCET Risk Score of 83/100 indicates significant potential danger.

Impacted Technologies

VendorProductVersion(s)CPE
< 7.1.94.8908CPE matchmatch criteria
cpe:2.3:o:meritlilin:p2r8852e2_firmware:*:*:*:*:*:*:*:*
< 7.1.94.8908CPE matchmatch criteria
cpe:2.3:o:meritlilin:p2r8852e4_firmware:*:*:*:*:*:*:*:*
< 7.1.94.8908CPE matchmatch criteria
cpe:2.3:o:meritlilin:p2r6852e2_firmware:*:*:*:*:*:*:*:*
< 7.1.94.8908CPE matchmatch criteria
cpe:2.3:o:meritlilin:p2r6852e4_firmware:*:*:*:*:*:*:*:*
< 7.1.94.8908CPE matchmatch criteria
cpe:2.3:o:meritlilin:p2r6552e2_firmware:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

9.8CRITICAL

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
Exploitability Score
3.9
Impact Score
5.9
CvssVersion
3.1

Exploit Intelligence

EPSS Score
2.44%
Probability of exploitation in next 30 days
EPSS Percentile
82.6%
Percentile rank of EPSS score among Peer Group
As of 2026-07-28
Model: v2026.06.15
This CVE's current EPSS score of 0.0244 is in the 73rd percentile among its peer group of 36,897 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.3 Bluesky, 0.3 Mastodon, and 2.4 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.3 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Remediation records are not available for this CVE.

References

gist.github.com / keniver/86ebef688fb274b534da51ef1a84dd3e
Third Party Advisory
chtsecurity.com / news/0b733a38-e616-4ff3-86a6-13e710643388
Third Party Advisory
meritlilin.com / assets/uploads/support/file/M00166-TW.pdf
Vendor Advisory
twcert.org.tw / tw/cp-132-4676-391a5-1.html
Not Applicable