CVE-2021-44527

6.5 mediumEPSS 0.4%

Medium (6.5) in ui unifi switch firmware. EPSS 0.4% chance of exploitation in the next 30 days.

A vulnerability found in UniFi Switch firmware Version 5.43.35 and earlier allows a malicious actor who has already gained access to the network to perform a Deny of Service (DoS) attack on the affected switch.This vulnerability is fixed in UniFi Switch firmware 5.76.6 and later.

Severity

CVSS 3.1

6.5 medium

CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

EPSS: 0.4% chance of exploitation in the next 30 days; higher than 32% of CVEs (scores of 2026-10-31)
CWE: CWE-400
Published: 2021-12-07
Modified: 2026-06-17
Record from: the NVD, synced 2026-10-19

Affected

ui:unifi_switch_firmware

References

https://community.ui.com/releases/Security-Advisory-Bulletin-022-022/cd83c01b-33e4-454a-b3b9-1c3ccebea7cb
https://community.ui.com/releases/Security-Advisory-Bulletin-022-022/cd83c01b-33e4-454a-b3b9-1c3ccebea7cb

Check your stack JSON