CVE-2021-22882Network attack vector

Unauthenticated controller crash via spoofed cameras

Published Feb 23, 2021 · Updated Aug 3, 2024

Denial of service in Ubiquiti UniFi Protect before 1.17.1 allows remote attackers to crash the controller with a spoofed camera. Public advisories identify the trigger only as a spoofed camera; they do not disclose the camera protocol, malformed field, or failing code path. The attack requires network reachability to a Protect host but no authentication or user interaction, and its documented consequence is a controller crash.

CVSS severity7.5
High
EPSS probability1.32%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Denial of service in Ubiquiti UniFi Protect before 1.17.1 allows remote attackers to crash the controller with a spoofed camera. Public advisories identify the trigger only as a spoofed camera; they do not disclose the camera protocol, malformed field, or failing code path. The attack requires network reachability to a Protect host but no authentication or user interaction, and its documented consequence is a controller crash.

The record

CVE
CVE-2021-22882
Published
Feb 23, 2021
Updated
Aug 3, 2024
Vendor
Ubiquiti Inc.
Product
UniFi Protect
Classifications
CWE-400, T1499.004
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Feb 23, 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=Fixed in v1.17.1

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Ubiquiti Inc. · UniFi Protectversion=Fixed in v1.17.1

Published CVSS scores

7.5NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
7.5Ubiquiti Inc.CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
5.0NIST NVDAV:N/AC:L/Au:N/C:N/I:N/A:P

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 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-400Uncontrolled Resource Consumption
T1499.004Application or System Exploitation

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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