TI-2021-20127 Aliases CVE-2021-44527 GHSA-2fpq-jhjc-vqfv

Uncontrolled resource consumption in UniFi Switches

LOW 29CWE-400Published 2021-12-07 · Updated 2024-08-04

Key facts

Attack vector: Adjacent network
Privileges required: None
User interaction: None
Attack complexity: Low
Impact type: Denial of service
Confidentiality · integrity · availability: None · None · High
Fix status: No fix listed

Attack profile from CVSS 3.1 · NVD. Fix status from CNA. Impact type from CWE-400.

Summary

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.

Why it matters now

EPSS 0.00381 32nd percentileScored 2026-11-07

Fix No fix listed No fixed version in the sources yet

SSVC decision points

Not available: CISA has not published SSVC decision points for this record.

Affected products

Vendor	Product	Affected versions	Fixed in	Status	Source
—	UniFi Switches	Fixed in 5.76.6	—	No fix listed	CNA

UniFi Switches Vendor— Affected Fixed in 5.76.6 Fixed in — No fix listed CNA

CPE configurations NVD · 1

CPE	Versions	Role	Vendor
cpe:2.3:o:ui:unifi_switch_firmware::::::::	before 5.76.6	Vulnerable	Ubiquiti

cpe:2.3:o:ui:unifi_switch_firmware:*:*:*:*:*:*:*:* Versions before 5.76.6 Vulnerable ·Ubiquiti

Remediation

No fixed version listed by the sources yet.

Timeline

2026-10-02 Threatist record created from CVE-2021-44527
2026-10-03 Alias added: GHSA-2fpq-jhjc-vqfv

References

Advisory 1

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

TI-2023-17555 Integer overflow in Ubiquiti UniFi Access Points CVSS 3.1CRITICAL 9.8
TI-2023-19459 Command injection in Ubiquiti UniFi Access Points CVSS 3.1CRITICAL 9.8

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences