CVE-2021-3182

Authenticated device compromise via buffer overflow

Published Jan 19, 2021 · Updated Aug 3, 2024

Buffer overflow in D-Link DCS-5220 firmware allows remote authenticated users on an adjacent network to compromise the camera. The public record does not identify the affected process, request field, buffer, or unsafe copy operation. Access requires adjacent-network reachability and low privileges; published assessments cover data exposure, alteration, and service interruption, but no code-execution mechanism is documented.

CVSS severity8.0
High
EPSS probability0.91%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Buffer overflow in D-Link DCS-5220 firmware allows remote authenticated users on an adjacent network to compromise the camera. The public record does not identify the affected process, request field, buffer, or unsafe copy operation. Access requires adjacent-network reachability and low privileges; published assessments cover data exposure, alteration, and service interruption, but no code-execution mechanism is documented.

The record

CVE
CVE-2021-3182
Published
Jan 19, 2021
Updated
Aug 3, 2024
Vendor
D-Link
Product
DCS-5220 Firmware
Classifications
CWE-787, CWE-120
Attack vector
adjacent
Privileges
authenticated

Timeline

How it unfolded

  1. Jan 19, 2021CVE publishedPublication date reported by the CVE source.
  2. Aug 3, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=0 <*

What conditions does exploitation require?

Attack vectoradjacent
Required privilegesauthenticated

What is affected?

D-Link · DCS-5220 Firmwareversion=0 <*

Published CVSS scores

7.7NIST NVDAV:A/AC:L/Au:S/C:C/I:C/A:C
8.0CISA-ADPCVSS:3.1/AV:A/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
8.0NIST NVDCVSS:3.1/AV:A/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectoradjacent
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-787Out-of-bounds Write
CWE-120Buffer Copy without Checking Size of Input ('Classic Buffer Overflow')

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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