CVE-2026-77536

CRITICALCVSS 9.9/10EPSS 0.23%

Last modified

CVE-2026-77536 is a critical-severity vulnerability rated 9.9/10 on the CVSS scale. 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.. EPSS estimates a 0.23% chance of exploitation in the next 30 days.

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.

Metrics

CVSS 3.1
9.9/10

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H

EPSS Probability
0.23%

13.9th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

Source: CNA advisory (CVE.org). NVD analysis pending.

VendorProductVersions
Ubiquiti IncUniFi OS Server< 5.1.37
Ubiquiti IncCloud Keys< 5.1.31
Ubiquiti IncNetwork Video Recorders< 5.1.31
Ubiquiti IncEnterprise Network Video Recorders< 5.1.31
Ubiquiti IncEnterprise Network Attached Storage< 5.1.31
Ubiquiti IncDream Machines< 5.1.31
Ubiquiti IncEnterprise Firewall Core< 5.1.31
Ubiquiti IncDream Routers< 5.1.31
Ubiquiti IncEnterprise Fortress Gateway< 5.1.31
Ubiquiti IncCloud Gateways< 5.1.31
Ubiquiti IncDream Wall< 5.1.31
Ubiquiti IncExpress 7< 5.1.31
Ubiquiti IncNetwork Attached Storage< 5.1.32

References

Timeline

Published
Last Modified
Status
Deferred

Frequently Asked Questions

What is CVE-2026-77536?
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.
How severe is CVE-2026-77536?
CVE-2026-77536 has a CVSS score of 9.9/10 (CRITICAL severity). The EPSS model estimates a 0.23% probability of exploitation in the next 30 days.
How do I fix CVE-2026-77536?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

How Strix Helps

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Source: NVD / NIST