Is CVE-2026-21634 actively exploited?

CVE-2026-21634 has no public evidence of in-the-wild exploitation as of 2026-01-30.

What is the CVSS score for CVE-2026-21634?

CVE-2026-21634 has a CVSS score of 6.5 (MEDIUM severity). Vector: CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.

How do I patch CVE-2026-21634?

Patch guidance is available from ui security advisories. CVEDatabase generates AI-assisted remediation guidance on demand for CVE-2026-21634.

CVE-2026-21634 - remediation guidance & executive summary

Description

A malicious actor with access to the adjacent network could overflow the UniFi Protect Application (Version 6.1.79 and earlier) discovery protocol causing it to restart. 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

Vector: CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Attack Vector: adjacent network
Complexity: low
Privileges: none
User Action: none
Scope: unchanged
Confidentiality: none
Integrity: none
Availability: high
Weaknesses: CWE-119 · Memory Buffer Errors

Metadata

Primary Vendor: UI
Published: 1/5/2026
Last Modified: 1/30/2026
Source: NIST NVD
Note: Verify all details with official vendor sources before applying patches.

CVE-2026-21634

Description

CVSS Metrics

Metadata

Affected Products

Remediation Guidance

Executive Summary