CVE-2026-34910 Ubiquiti UniFi OS: software flaw
In plain words: A mistake in the software that attackers have found a way to abuse. Depends on the product — see the description and the vendor advisory.
Confirmed exploited by CISA on · US federal patch deadline Jun 26, 2026
What to do
- Install Ubiquiti's security update for UniFi OS. If no update exists, follow the vendor's workaround or stop using the product until one ships.
- Turn on automatic firmware updates and replace gear the maker no longer supports.
- Change default passwords and switch off remote administration and features you do not use.
- Do not put storage boxes or cameras directly on the internet — use the maker's app or a VPN.
Who is affected
Could reach you. This one is aimed at devices or apps of the kind people own.
What's at risk: Taken over in bulk to join botnets, used to watch your traffic, or — for storage boxes — locked by ransomware.
The details
- Official name
- Ubiquiti UniFi OS Improper Input Validation Vulnerability
- Product
- Ubiquiti UniFi OS
- CISA description
- Ubiquiti UniFi OS contains an improper input validation vulnerability which could allow a malicious actor with access to the network to conduct command injection.
- Type of flaw
- Software flaw (CWE-20)
- Confirmed exploited
- Jun 23, 2026
- US federal patch deadline
- Jun 26, 2026
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Answering about CVE-2026-34910 ·
Questions about CVE-2026-34910
Is CVE-2026-34910 being exploited?
Yes. CISA added CVE-2026-34910 to its Known Exploited Vulnerabilities catalog on Jun 23, 2026, which means there is reliable evidence of real-world attacks.
How do I fix CVE-2026-34910?
Install Ubiquiti's security update for UniFi OS. If no update exists, follow the vendor's workaround or stop using the product until one ships. Turn on automatic firmware updates and replace gear the maker no longer supports.
Am I affected by CVE-2026-34910?
Only if you use Ubiquiti UniFi OS. This one is aimed at devices or apps of the kind people own.