Ubiquiti UniFi OS Server: Mehrere Schwachstellen
WID-SEC-2026-1639 · first 22.05.2026 · updated 24.06.2026 · CVSS 10,0
What it is about
UniFi ist Ubiquiti's End-to-End-Netzwerk-Ökosystem für Unternehmen und Smart Homes. Ein Angreifer kann mehrere Schwachstellen in Ubiquiti UniFi OS Server ausnutzen, um beliebigen Programmcode auszuführen, Sicherheitsmaßnahmen zu umgehen, Daten zu manipulieren oder vertrauliche Informationen offenzulegen.
Under what conditions?
The BSI does not name any particular preconditions. Exploitable remotely according to the BSI.
What can happen in the worst case
An attacker could use the vulnerability to
- beliebigen Programmcode auszuführen
- Sicherheitsmaßnahmen zu umgehen
- Daten zu manipulieren oder vertrauliche Informationen offenzulegen
Am I affected?
Affected according to the BSI:
- Ubiquiti UniFi OS Server <5.0.8
The installed version is usually shown under “Help → About” or in the device’s admin interface.
What helps?
Update to at least:
- Ubiquiti UniFi OS Server 5.0.8
Is the vulnerability already being exploited?
- CVE-2026-34910: exploited in the wild according to CISA, in the catalogue since 23.06.2026.
- CVE-2026-34909: exploited in the wild according to CISA, in the catalogue since 23.06.2026.
- CVE-2026-34908: exploited in the wild according to CISA, in the catalogue since 23.06.2026.
Information and sources
- Original BSI advisory (WID)
- Unifi Security Advisory Bulletin vom 2026-05-21 community.ui.com
- CISA Known Exploited Vulnerabilities Catalog vom 2026-06-23 www.cisa.gov
CVE: CVE-2026-33000, CVE-2026-34908, CVE-2026-34909, CVE-2026-34910, CVE-2026-34911
Source: BSI warning and information service (CERT-Bund); CISA. The assessment of the conditions is my reading of the BSI text; the external pages are in their original language.