How severe is CVE-2021-40410?

CVE-2021-40410 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-2021-40410 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 28% (98th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-40410?

CVE-2021-40410 affects Reolink Rlc-410w Firmware. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2021-40410?

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-2021-40410 published?

CVE-2021-40410 was published on 2022-01-28 and last updated on 2026-06-17.

CVE-2021-40410

CVE-2021-40410 is a high-severity vulnerability in Reolink Rlc-410w Firmware with a CVSS 3.x base score of 7.2. Its EPSS exploit-prediction score of 28% places it in the 98th percentile, indicating an elevated likelihood of exploitation. The underlying weakness is classified as CWE-78.

Key facts

Severity: High (CVSS 3.x base score 7.2)
CVSS v2: 6.5
EPSS exploit prediction: 28% (98th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-78
Affected product: Reolink Rlc-410w Firmware
Published: 2022-01-28
Last modified: 2026-06-17

Description

An OS command injection vulnerability exists in the device network settings functionality of reolink RLC-410W v3.0.0.136_20121102. At [4] the dns_data->dns1 variable, that has the value of the dns1 parameter provided through the SetLocal API, is not validated properly. This would lead to an OS command injection.

Frequently asked questions

What is CVE-2021-40410?: An OS command injection vulnerability exists in the device network settings functionality of reolink RLC-410W v3.0.0.136_20121102. At [4] the dns_data->dns1 variable, that has the value of the dns1 parameter provided through the SetLocal API, is not validated properly. This would lead to an OS command injection.
How severe is CVE-2021-40410?: CVE-2021-40410 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-2021-40410 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 28% (98th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-40410?: CVE-2021-40410 affects Reolink Rlc-410w Firmware. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2021-40410?: 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-2021-40410 published?: CVE-2021-40410 was published on 2022-01-28 and last updated on 2026-06-17.

References

https://talosintelligence.com/vulnerability_reports/TALOS-2021-1424

Affected products (1)

cpe:2.3:o:reolink:rlc-410w_firmware:3.0.0.136_20121102:*:*:*:*:*:*:*

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