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Fencer Intel
high 7.5

CVE-2026-55110 json

A malicious actor who lures an authenticated user to a malicious page could exploit a Cross-Origin Resource Sharing (CORS) misconfiguration…

published 4mo ago modified 4mo ago also EUVD-2026-41388

cvss
7.5
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.3%
EPSS 0.3% chance of exploitation in 30 days, percentile 19%
public exploits
0
none known

Summary

A malicious actor who lures an authenticated user to a malicious page could exploit a Cross-Origin Resource Sharing (CORS) misconfiguration found in UniFi OS to trigger actions in UniFi OS using that user's session.

Patch / fix

  • Ubiquiti Inc UniFi OS Server 5.1.19
  • 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 Keys 5.1.19
  • Ubiquiti Inc Network Video Recorders 5.1.19
  • Ubiquiti Inc Enterprise Video Recorders 5.1.19
  • Ubiquiti Inc Cloud Gateways 5.1.19
  • Ubiquiti Inc Network Attached Storage 5.1.19
  • Ubiquiti Inc Enterprise Firewall Core 5.1.19

Is CVE-2026-55110 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

0.27% chance of exploitation in the next 30 days, higher than 19% of all scored CVEs (FIRST EPSS, 2026-11-11).

CVSS scores

assigned by version score vector
CNA 3.1 7.5 CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H
NVD 3.1 6.1 CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

Affected products

  • Ubiquiti Inc UniFi OS Server
  • Ubiquiti Inc Dream Machines
  • Ubiquiti Inc Enterprise Fortress Gateway
  • Ubiquiti Inc Dream Wall
  • Ubiquiti Inc Dream Routers
  • Ubiquiti Inc Express 7
  • Ubiquiti Inc Cloud Keys
  • Ubiquiti Inc Network Video Recorders
  • Ubiquiti Inc Enterprise Video Recorders
  • Ubiquiti Inc Cloud Gateways
  • Ubiquiti Inc Network Attached Storage
  • Ubiquiti Inc Enterprise Firewall Core

Classification

Weakness
  • CWE-942 Permissive Cross-domain Security Policy with Untrusted Domains

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.