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Fencer Vulns
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 2026-07-02 4 mo ago modified 2026-07-09 4 mo 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

CISA SSVC

Exploitation
none
Automatable
no
Technical impact
total
Assessed
4 mo ago

Exploit prediction

0.27% chance of exploitation in the next 30 days, higher than 19% of all scored CVEs (FIRST EPSS, 2026-11-08).

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 Vulns 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.