How severe is CVE-2021-3182?

CVE-2021-3182 has a CVSS 3.x base score of 8.0, rated high severity. It is exploitable over an adjacent network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2021-3182 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-2021-3182?

CVE-2021-3182 affects Dlink Dcs-5220 Firmware. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2021-3182?

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-2021-3182 published?

CVE-2021-3182 was published on 2021-01-19 and last updated on 2026-06-17.

CVE-2021-3182

CVE-2021-3182 is a high-severity vulnerability in Dlink Dcs-5220 Firmware with a CVSS 3.x base score of 8.0. 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-787.

Key facts

Severity: High (CVSS 3.x base score 8.0)
CVSS v2: 7.7
EPSS exploit prediction: 1% (56th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-787
Affected product: Dlink Dcs-5220 Firmware
Published: 2021-01-19
Last modified: 2026-06-17

Description

D-Link DCS-5220 devices have a buffer overflow. NOTE: This vulnerability only affects products that are no longer supported by the maintainer

Frequently asked questions

What is CVE-2021-3182?: D-Link DCS-5220 devices have a buffer overflow. NOTE: This vulnerability only affects products that are no longer supported by the maintainer
How severe is CVE-2021-3182?: CVE-2021-3182 has a CVSS 3.x base score of 8.0, rated high severity. It is exploitable over an adjacent network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2021-3182 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-2021-3182?: CVE-2021-3182 affects Dlink Dcs-5220 Firmware. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2021-3182?: 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-2021-3182 published?: CVE-2021-3182 was published on 2021-01-19 and last updated on 2026-06-17.

References

https://supportannouncement.us.dlink.com/announcement/publication.aspx?name=SAP10203

Affected products (1)

cpe:2.3:o:dlink:dcs-5220_firmware:-:*:*:*:*:*:*:*

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