CVE-2026-77534: Ubiquiti malicious actor with access to the network and low privileges could exploit an Improper Access Control vulnerability found in certain devices running UniFi OS to escalate privileges within such UniFi OS devices or instances
This Ubiquiti advisory covers CVE-2026-77534 in UniFi OS Server.
- CVE-2026-77534
Key facts
- Vendor rating
- Critical, CVSS 9.9
- CISA KEV
- Not listed (catalogue checked )
- Affected
- UniFi OS Server before 5.1.37; Cloud Keys before 5.1.31; Network Video Recorders before 5.1.31 and 9 more below
- Fixed in
- 5.1.37, 5.1.31, 5.1.32
- Source published
- Source revised
- Listed by VulniPulse
- Record changed
Compiled by VulniPulse from the linked sources. How records are collected and checked.
Affected products & platforms
Description
A malicious actor with access to the network and low privileges could exploit an Improper Access Control vulnerability found in certain devices running UniFi OS to escalate privileges within such UniFi OS devices or instances.
Affected product named by the advisory: UniFi OS Server.
Text from the source record.
- UniFi OS Server before 5.1.37
- Cloud Keys before 5.1.31
- Network Video Recorders before 5.1.31
- Enterprise Network Video Recorders before 5.1.31
- Enterprise Network Attached Storage before 5.1.31
- Dream Machines before 5.1.31
- Enterprise Firewall Core before 5.1.31
- Dream Routers before 5.1.31
- Enterprise Fortress Gateway before 5.1.31
- Cloud Gateways before 5.1.31
- Dream Wall before 5.1.31
- Express 7 before 5.1.31
Official advisory · high-confidence parse· fetched ·verify at source
How to fix CVE-2026-77534
Upgrade to a fixed release named by Ubiquiti:
- 5.1.37
- 5.1.31
- 5.1.32
More Ubiquiti advisories
CVE-2026-77550Aug 26, 2026malicious actor with access to the network could exploit an Improper NeutralizationCVE-2026-77549Aug 26, 2026malicious actor with access to the network and under certain conditions could exploitCVE-2026-77545Aug 26, 2026malicious actor with access to the network, low privileges and under certain conditionsCVE-2026-77540Aug 26, 2026malicious actor with access to the network and high privileges could exploitCVE-2026-77539Aug 26, 2026malicious actor with access to the network and high privileges could exploitCVE-2026-77536Aug 26, 2026malicious actor with access to the network and low privileges could exploit
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