8.8

CVE-2026-21633: ubiquiti inc unifi protect application Improper Authentication

CVSS: 8.8v3.1HighAnalyzed
Published 05-01-2026Last modified 05-01-2026
Open JSON

Vulnerability summary

CVE-2026-21633 is a high (CVSS 8.8) Improper Authentication vulnerability in ubiquiti inc unifi protect application. EPSS estimates a 0.46% chance of exploitation in the next 30 days, higher than 38.4% of scored vulnerabilities.

Overall risk
35/100
0100
Medium · default modelHow is this calculated?
CVSS score
8.8/10
010
High · v3.1 (CVE.org)
EPSS score
0.46%
0%100%
Low · +0.01 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Timeline

  1. 05-01-2026
    PublishedVulnerability first disclosed.
  2. 05-01-2026
    Last modifiedVulnerability information updated.

Description

A malicious actor with access to the adjacent network could obtain unauthorized access to a UniFi Protect Camera by exploiting a discovery protocol vulnerability in the Unifi Protect Application (Version 6.1.79 and earlier). Affected Products: UniFi Protect Application (Version 6.1.79 and earlier). Mitigation: Update your UniFi Protect Application to Version 6.2.72 or later.

CVSS metrics

2 scores · 2 sources · 1 version

EPSS trend

Probability

0.46%

Chance of exploitation in the next 30 days

Percentile

38%

Versus all other CVEs

30-day change

+0.01 pp

From 0.45% on 19-09-2026

19-09-202619-10-2026
EPSS score
0.46%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Ubiquiti inc1 product
Ui1 product

2 vendors · 2 products

References

1 links