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Fencer Intel
critical 9.0

CVE-2026-55116 json

A malicious actor with access to the network and under certain network configurations could exploit an Improper Access Control vulnerabilit…

published 4mo ago modified 4mo ago also EUVD-2026-41400

cvss
9.0
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.4%
EPSS 0.4% chance of exploitation in 30 days, percentile 35%
public exploits
0
none known

Summary

A malicious actor with access to the network and under certain network configurations could exploit an Improper Access Control vulnerability found in certain devices running UniFi OS to make unauthorized changes to such UniFi OS devices.

Patch / fix

  • Ubiquiti Inc Dream Machines 5.1.19
  • Ubiquiti Inc Enterprise Fortress Gateway 5.1.19
  • Ubiquiti Inc Dream Wall 5.1.19
  • Ubiquiti Inc Dream Routers 5.1.19
  • Ubiquiti Inc Express 7 5.1.19
  • Ubiquiti Inc Cloud Gateways 5.1.19
  • Ubiquiti Inc Enterprise Firewall Core 5.1.19

Is CVE-2026-55116 in your stack? Fencer shows which of your repositories are affected as soon as an advisory lands, and opens the fix as a pull request.

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CISA SSVC

Exploitation
none
Automatable
no
Technical impact
total
Assessed
4mo ago

Exploit prediction

0.41% chance of exploitation in the next 30 days, higher than 35% of all scored CVEs (FIRST EPSS, 2026-11-11).

CVSS scores

assigned by version score vector
CNA 3.1 9.0 CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:H
NVD 3.1 9.8 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Affected products

  • Ubiquiti Inc Dream Machines
  • Ubiquiti Inc Enterprise Fortress Gateway
  • Ubiquiti Inc Dream Wall
  • Ubiquiti Inc Dream Routers
  • Ubiquiti Inc Express 7
  • Ubiquiti Inc Cloud Gateways
  • Ubiquiti Inc Enterprise Firewall Core

Classification

Weakness

References

Sources

Fencer Intel keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.

CPEs and fixed versions use Anchore's correction of NVD's data: Added CPE configurations because not yet analyzed by NVD.