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01 Record

CVE-2026-77545

A malicious actor with access to the network, low privileges and under certain conditions could exploit an Active Debug Code vulnerability found in certain devices running UniFi OS to escalate

CriticalPUBLISHEDCNA: Ubiquiti
CNA base score9.0 CVSS v3.xCVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:H
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02 Description

A malicious actor with access to the network, low privileges and under certain conditions could exploit an Active Debug Code vulnerability found in certain devices running UniFi OS to escalate

03 Exploitation and scoring

Exploitation
Assessed, none found. CISA's assessment recorded neither public exploit code nor evidence of exploitation when it was made.
SSVC decision
  • ExploitationnoneCISA recorded no public exploit code and no evidence of exploitation.
  • AutomatablenoAt least one step from reconnaissance to exploitation cannot be reliably automated.
  • Technical ImpacttotalSuccessful exploitation gives total control of the vulnerable component.
CISA publishes the decision points, not a final SSVC decision. The decision also depends on mission and well-being impact, which is a property of your deployment rather than of the vulnerability.
EPSS probability
0.43% probability of exploitation activity in the next 30 days.
EPSS percentile
Equal to or higher than the score of 37.3% of scored records. A rank, not a probability.
NVD base score
9.0 (CVSS v3.x), scored by the NVD independently of the CNA.
NVD CVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:H
NVD analysis status
Deferred. NVD last modified this record on 2026-08-28.
Red Hat severity
No Red Hat rating. Red Hat rates the CVEs that affect its products.

Exploit-prediction scores from FIRST. Independent scoring and analysis status from the NVD. Vendor severity from Red Hat. Exploitation assessment and catalog membership from CISA.

04 Metadata

Published
2026-08-26 10:13Z2 MO AGO
Last updated
2026-08-27 03:56Z2 MO AGO
Reserved
2026-08-20
Assigning CNA
Ubiquiti
Record state
PUBLISHED
Severity
Critical (CVSS 9.0)
CNA CVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:H
Weaknesses
Data version
5.2
Document digest
5687e884a55c8e42989593473cb2f7b41b457021f0e3aed9e0632f5690a97f34

05 Affected products

VendorProductVersionsPlatforms
Ubiquiti IncUniFi OS Server0 to < 5.1.37—
Ubiquiti IncCloud Keys0 to < 5.1.31—
Ubiquiti IncNetwork Video Recorders0 to < 5.1.31—
Ubiquiti IncEnterprise Network Video Recorders0 to < 5.1.31—
Ubiquiti IncEnterprise Network Attached Storage0 to < 5.1.31—
Ubiquiti IncDream Machines0 to < 5.1.31—
Ubiquiti IncEnterprise Firewall Core0 to < 5.1.31—
Ubiquiti IncDream Routers0 to < 5.1.31—
Ubiquiti IncEnterprise Fortress Gateway0 to < 5.1.31—
Ubiquiti IncCloud Gateways0 to < 5.1.31—
Ubiquiti IncDream Wall0 to < 5.1.31—
Ubiquiti IncExpress 70 to < 5.1.31—
Ubiquiti IncNetwork Attached Storage0 to < 5.1.32—

06 References