How severe is CVE-2026-21633?

CVE-2026-21633 has a CVSS 3.x base score of 8.8, rated high severity. It is exploitable over an adjacent network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2026-21633 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (38th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-21633?

CVE-2026-21633 affects Ui Unifi Protect. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-21633?

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.

Does CVE-2026-21633 have an EU (EUVD) identifier?

Yes. CVE-2026-21633 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-0828.

When was CVE-2026-21633 published?

CVE-2026-21633 was published on 2026-01-05 and last updated on 2026-06-17.

CVE-2026-21633

CVE-2026-21633 is a high-severity vulnerability in Ui Unifi Protect with a CVSS 3.x base score of 8.8. 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-287.

Key facts

Severity: High (CVSS 3.x base score 8.8)
EPSS exploit prediction: 0% (38th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-0828
Weakness: CWE-287
Affected product: Ui Unifi Protect
Published: 2026-01-05
Last modified: 2026-06-17

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.

Frequently asked questions

What is CVE-2026-21633?: 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.
How severe is CVE-2026-21633?: CVE-2026-21633 has a CVSS 3.x base score of 8.8, rated high severity. It is exploitable over an adjacent network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2026-21633 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (38th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-21633?: CVE-2026-21633 affects Ui Unifi Protect. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-21633?: 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.
Does CVE-2026-21633 have an EU (EUVD) identifier?: Yes. CVE-2026-21633 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-0828.
When was CVE-2026-21633 published?: CVE-2026-21633 was published on 2026-01-05 and last updated on 2026-06-17.

References

https://community.ui.com/releases/Security-Advisory-Bulletin-058-058/6922ff20-8cd7-4724-8d8c-676458a2d0f9

Affected products (1)

cpe:2.3:a:ui:unifi_protect:*:*:*:*:*:*:*:*

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