What is CVE-2026-77557?

CVE-2026-77557 is a critical-severity vulnerability in Ubiquiti Inc Unifi Protect Ai Key, classified under Improper Access Control. CVSS score: 9.8/10. Published 2026-08-26.

How severe is CVE-2026-77557?

Critical severity. CVSS v3 base score is 9.8 out of 10.

Vulnerability in Ubiquiti Inc Unifi Protect Ai Key

CVE-2026-77557

A malicious actor with access to the network could exploit an Improper Access Control vulnerability found in UniFi Protect AI Key to escalate privileges on the device.

CVSS v3 metric

CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

Affected products

Ubiquiti Inc Unifi Protect Ai Key

Weakness classification (CWE)

CWE-284 — Improper Access Control

References

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Frequently asked questions

What is CVE-2026-77557?: CVE-2026-77557 is a critical-severity vulnerability in Ubiquiti Inc Unifi Protect Ai Key, classified under Improper Access Control. CVSS score: 9.8/10. Published 2026-08-26.
How severe is CVE-2026-77557?: Critical severity. CVSS v3 base score is 9.8 out of 10.