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CVE-2021-22882

24
FAUCET Score

CVE-2021-22882 is a denial-of-service vulnerability affecting UniFi Protect before v1.17.1, specifically impacting UniFi Cloud Key Plus, Dream Machine Pro, and Network Video Recorder devices. An unauthenticated attacker can exploit this by spoofing cameras, leading to the UniFi Protect controller crashing. This vulnerability is rated High severity (CVSS 7.5) due to its network-based attack vector and low complexity, allowing for a complete denial of service without user interaction. Currently, there is no evidence of active exploitation, public exploit code (Metasploit, Nuclei, ExploitDB), or significant community discussion or media coverage.

Impacted Technologies

VendorProductVersion(s)CPE
< 1.17.1CPE matchmatch criteria
cpe:2.3:a:ui:unifi_protect_controller:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

7.5HIGH

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
HIGH
Exploitability Score
3.9
Impact Score
3.6
CvssVersion
3.1

Exploit Intelligence

EPSS Score
1.27%
Probability of exploitation in next 30 days
EPSS Percentile
66.9%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0127 is in the 46th percentile among its peer group of 51,506 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.1 Mastodon, and 0.4 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Remediation records are not available for this CVE.

References

community.ui.com / releases/Security-advisory-bulletin-017-017/071141e5-bc2e-4b71-81f3-5e499316fcee
Vendor Advisory
hackerone.com / reports/1008579
Third Party Advisory