CVE-2026-34910
A critical vulnerability in UniFi OS devices allows attackers with network access to run arbitrary commands on the device. The flaw is caused by improper input validation. It can lead to full system compromise.
No official fix yet. If none appears within 45 days of first tracking, this entry is removed automatically.
Who is affected
UniFi OS devices such as UniFi OS Server, UniFi Cloud Gateway Industrial, UniFi Dream Machine (and its variants), Enterprise Fortress Gateway, and UniFi Dream Wall. The typical users are network administrators and small to medium businesses that deploy UniFi networking hardware.
Real-world impact
An attacker could execute arbitrary commands on the device, potentially taking full control, exfiltrating data, or using the device as a foothold for further attacks.
Why this severity
The CVSS score of 10 reflects that the vulnerability can be exploited remotely without authentication, with no user interaction, and gives the attacker full control over confidentiality, integrity, and availability.
What to do about it
- ›Follow vendor instructions and CISA BOD 26-04 guidance to mitigate the vulnerability.
No official fix or mitigation is documented in the sources yet. Monitor the vendor advisory and apply the patch as soon as it is released.
CISA KEV required action
Timeline
- May 22, 2026 · May 22, 2026PublishedDisclosed and added to the National Vulnerability Database.
- Jun 23, 2026 · Jun 23, 2026Confirmed exploited (CISA KEV)CISA added it to the Known Exploited Vulnerabilities catalog — attackers are using it in the wild.
- Jun 26, 2026 · Jun 26, 2026CISA remediation deadlineFederal agencies are required to remediate by this date.
- Jul 23, 2026 · 12d agoAdvisory updatedThe NVD record was last revised.
How it’s attacked
References & advisories
- community.ui.com/releases/Security-Advisory-…patchvendor advisory
- cisa.gov/known-exploited-vulnerabili…us government resource
- pwndefend.com/2026/06/09/cve-2026-34910-e…exploitthird party advisory