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CVE-2026-21634

MEDIUM
6.5
CVSS Score
Published: January 5, 2026 at 04:47 PM UTC
Updated: June 17, 2026 at 10:18 AM UTC
2 products affected across 2 vendorsUnifi ProtectUnifi Protect

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Severity
MEDIUM6.5
Exploit prediction
EPSS 0.4%
SSVC
No known exploit

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.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Unifi Protect· UI
95%
v < 6.2.72
Unifi Protect· Ubiquiti
60%
6.1.79 ≤ v < 6.2.726.1.79
Affected range stops below 6.2.72, so it looks safe — our inference, not a vendor statement

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

Patch and advisory references

References (1)

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

SSVC — Action Prioritization

SSVCNo known exploitNot automatablePartial impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

6.5MEDIUMhackerone
Vector?

Quick Info

StatusANALYZED
CWE
CWE-119

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