How severe is CVE-2021-30166?

CVE-2021-30166 has a CVSS 3.x base score of 7.2, rated high severity. It is exploitable over network with low attack complexity, requires high privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2021-30166 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 4% (89th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-30166?

CVE-2021-30166 primarily affects Meritlilin P2r8852e2 Firmware. In total, 41 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2021-30166?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

When was CVE-2021-30166 published?

CVE-2021-30166 was published on 2021-04-28 and last updated on 2026-06-17.

CVE-2021-30166

CVE-2021-30166 is a high-severity vulnerability in Meritlilin P2r8852e2 Firmware with a CVSS 3.x base score of 7.2. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-78.

Key facts

Severity: High (CVSS 3.x base score 7.2)
CVSS v2: 9.0
EPSS exploit prediction: 4% (89th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-78
Affected product: Meritlilin P2r8852e2 Firmware
Published: 2021-04-28
Last modified: 2026-06-17

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.

Frequently asked questions

What is CVE-2021-30166?: 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.
How severe is CVE-2021-30166?: CVE-2021-30166 has a CVSS 3.x base score of 7.2, rated high severity. It is exploitable over network with low attack complexity, requires high privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2021-30166 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 4% (89th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-30166?: CVE-2021-30166 primarily affects Meritlilin P2r8852e2 Firmware. In total, 41 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2021-30166?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
When was CVE-2021-30166 published?: CVE-2021-30166 was published on 2021-04-28 and last updated on 2026-06-17.

References

Affected products (41)

cpe:2.3:o:meritlilin:p2r8852e2_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:meritlilin:p2r8852e4_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:meritlilin:p2r6852e2_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:meritlilin:p2r6852e4_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:meritlilin:p2r6552e2_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:meritlilin:p2r6552e4_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:meritlilin:p2r6352ae2_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:meritlilin:p2r6352ae4_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:meritlilin:p2r3052ae2_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:meritlilin:p2g1052_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:meritlilin:p2r8822e2_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:meritlilin:p2r8822e4_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:meritlilin:p2r6822e2_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:meritlilin:p2r6822e4_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:meritlilin:p2r6522e2_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:meritlilin:p2r6522e4_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:meritlilin:p2r6322ae2_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:meritlilin:p2r6322ae4_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:meritlilin:p2r3022ae2_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:meritlilin:p2g1022_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:meritlilin:p2g1022x_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:meritlilin:z2r8852ax_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:meritlilin:z2r8152x-p_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:meritlilin:z2r8152x2-p_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:meritlilin:z2r8052ex25_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:meritlilin:z2r6552x_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:meritlilin:z2r6452ax_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:meritlilin:z2r6452ax-p_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:meritlilin:z2r8822ax_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:meritlilin:z2r8122x-p_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:meritlilin:z2r8122x2-p_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:meritlilin:z2r8022ex25_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:meritlilin:z2r6522x_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:meritlilin:z2r6422ax_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:meritlilin:z2r6422ax-p_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:meritlilin:p3r6322e2_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:meritlilin:p3r6522e2_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:meritlilin:p3r8822e2_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:meritlilin:z3r6422x3_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:meritlilin:z3r6522x_firmware:*:*:*:*:*:*:*:*

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