TI-2026-18127 Aliases CVE-2026-22559 GHSA-8m5g-mp2m-6hp8

Improper input validation in Ubiquiti UniFi Network Server

MEDIUM 40CWE-20Published 2026-03-24 · Updated 2026-03-24

Key facts

Attack vector: Network
Privileges required: None
User interaction: Required
Attack complexity: Low
Impact type: —
Confidentiality · integrity · availability: High · High · High
Fix status: Fixed

Attack profile from CVSS 3.1 · CNA. Fix status from CNA.

Summary

An Improper Input Validation vulnerability in UniFi Network Server may allow unauthorized access to an account if the account owner is socially engineered into clicking a malicious link. Affected Products: UniFi Network Server (Version 10.1.85 and earlier) Mitigation: Update UniFi Network Server to Version 10.1.89 or later.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV

EPSS 0.00372 31st percentileScored 2026-11-07

Fix Fixed UniFi Network Server (Ubiquiti Inc): 10.1.89

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation: None
Automatable: No
Technical impact: Total

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

Vendor	Product	Affected versions	Fixed in	Status	Source
Ubiquiti	UniFi Network Server	10.1.89 to before 10.1.89	10.1.89	Patch available	CNA

UniFi Network Server VendorUbiquiti Affected 10.1.89 to before 10.1.89 Fixed in 10.1.89 Patch available CNA

Remediation

Fix · CNA UniFi Network Server (Ubiquiti Inc) Fixed in 10.1.89

Timeline

2026-10-02 Threatist record created from CVE-2026-22559
2026-10-03 Alias added: GHSA-8m5g-mp2m-6hp8

References

Other 1

https://community.ui.com/releases/Security-Advisory-Bulletin-062-062/c29719c0-405e-4d4a-8f26-e343e99f931b

TI-2026-27142 Improper input validation in Ubiquiti UniFi OS Server KEVCVSS 3.1CRITICAL 10.0
TI-2026-27141 Path traversal in Ubiquiti UniFi OS Server KEVCVSS 3.1CRITICAL 10.0
TI-2026-27140 Improper access control in Ubiquiti UniFi OS Server KEVCVSS 3.1CRITICAL 10.0
TI-2010-05027 On certain Ubiquiti devices, Command Injection exists via a GET request to stainfo.cgi… KEVCVSS 3.1CRITICAL 9.8
TI-2020-19187 AirControl 1.4.2 - PreAuth Remote Code Execution CVSS 4.0CRITICAL 9.3
TI-2015-07644 Ubiquiti airOS HTTP(S) unauthenticated arbitrary file upload CVSS 3.0CRITICAL 9.8

See all 206 →

Sources

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