Unauthorized account access via undisclosed input validation
Published Mar 24, 2026 · Updated Mar 24, 2026
Improper input validation in Ubiquiti UniFi Network Server before 10.1.89 allows remote attackers to gain unauthorized account access. Ubiquiti has not disclosed the affected request, parameter, or validation error that processes the malicious link. Exploitation requires an account owner to click an attacker-controlled link; UniFi OS Server and UniFi OS Consoles are not affected.
Summary
What happened
Improper input validation in Ubiquiti UniFi Network Server before 10.1.89 allows remote attackers to gain unauthorized account access. Ubiquiti has not disclosed the affected request, parameter, or validation error that processes the malicious link. Exploitation requires an account owner to click an attacker-controlled link; UniFi OS Server and UniFi OS Consoles are not affected.
The record
- CVE
- CVE-2026-22559
- Published
- Mar 24, 2026
- Updated
- Mar 24, 2026
- Vendor
- Ubiquiti
- Product
- UniFi Network Controller
- Classifications
- CWE-20, T1566.002
- Attack vector
- network
- Privileges
- unauthenticated
Timeline
How it unfolded
- Mar 24, 2026CVE publishedPublication date reported by the CVE source.
- Mar 24, 2026Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
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Is a vulnerable build present?
Compare these published version ranges with your installed build and any vendor patches.
- Affected versionversion=10.1.89 <10.1.89
What conditions does exploitation require?
What is affected?
Published CVSS scores
CVSS describes severity. EPSS estimates exploitation probability.
Attacks
What attackers are doing with it
Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.
Public exploit references
No public exploit references are available in this record.
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Technologies
Your stack
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Your stack
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