How severe is CVE-2021-3616?

CVE-2021-3616 has a CVSS 3.x base score of 9.4, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is low, integrity high, and availability high.

Is CVE-2021-3616 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (56th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-3616?

CVE-2021-3616 primarily affects Lenovo Smart Camera C2e Firmware. In total, 3 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2021-3616?

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

When was CVE-2021-3616 published?

CVE-2021-3616 was published on 2021-08-17 and last updated on 2026-06-17.

CVE-2021-3616

CVE-2021-3616 is a critical-severity vulnerability in Lenovo Smart Camera C2e Firmware with a CVSS 3.x base score of 9.4. 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-285.

Key facts

Severity: Critical (CVSS 3.x base score 9.4)
CVSS v2: 7.5
EPSS exploit prediction: 1% (56th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-285
Affected product: Lenovo Smart Camera C2e Firmware
Published: 2021-08-17
Last modified: 2026-06-17

Description

A vulnerability was reported in Lenovo Smart Camera X3, X5, and C2E that could allow an unauthorized user to view device information, alter firmware content and device configuration. This vulnerability is the same as CNVD-2020-68651.

Frequently asked questions

What is CVE-2021-3616?: A vulnerability was reported in Lenovo Smart Camera X3, X5, and C2E that could allow an unauthorized user to view device information, alter firmware content and device configuration. This vulnerability is the same as CNVD-2020-68651.
How severe is CVE-2021-3616?: CVE-2021-3616 has a CVSS 3.x base score of 9.4, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is low, integrity high, and availability high.
Is CVE-2021-3616 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (56th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-3616?: CVE-2021-3616 primarily affects Lenovo Smart Camera C2e Firmware. In total, 3 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2021-3616?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.
When was CVE-2021-3616 published?: CVE-2021-3616 was published on 2021-08-17 and last updated on 2026-06-17.

References

Affected products (3)

cpe:2.3:o:lenovo:smart_camera_c2e_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:lenovo:smart_camera_x3_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:lenovo:smart_camera_x5_firmware:*:*:*:*:*:*:*:*

More vulnerabilities in Lenovo Smart Camera C2e Firmware

CVE-2021-3617 — High (CVSS 7.2): A vulnerability was reported in Lenovo Smart Camera X3, X5, and C2E that could allow command injection by setting a…
CVE-2021-3615 — Medium (CVSS 6.6): A vulnerability was reported in Lenovo Smart Camera X3, X5, and C2E that could allow code execution if a specific file…

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