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Fencer Intel
medium 5.9

CVE-2025-23091 json

An Improper Certificate Validation on UniFi OS devices, with Identity Enterprise configured, could allow a malicious actor to execute a man…

published last yr. modified 4mo ago also EUVD-2025-3119

cvss
5.9
version 3.0, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.2%
EPSS 0.2% chance of exploitation in 30 days, percentile 10%
public exploits
0
none known

Summary

An Improper Certificate Validation on UniFi OS devices, with Identity Enterprise configured, could allow a malicious actor to execute a man-in-the-middle (MitM) attack during application update.

Patch / fix

  • ui unifi_os_server 4.1.11, 4.1.13

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CISA SSVC

Exploitation
none
Automatable
no
Technical impact
partial
Assessed
last yr.

Exploit prediction

0.21% chance of exploitation in the next 30 days, higher than 10% of all scored CVEs (FIRST EPSS, 2026-11-09).

CVSS scores

assigned by version score vector
CNA 3.0 5.9 CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N

Affected products

  • Ubiquiti Inc UDM
  • Ubiquiti Inc UDM-Pro
  • Ubiquiti Inc UDM-SE
  • Ubiquiti Inc UDM-Pro-Max
  • Ubiquiti Inc UDW
  • Ubiquiti Inc UNVR
  • Ubiquiti Inc UNVR PRO
  • Ubiquiti Inc UCKP
  • Ubiquiti Inc UCK
  • Ubiquiti Inc UCK-Enterprise
  • Ubiquiti Inc UCG-Max
  • Ubiquiti Inc EFG

Classification

Weakness
  • CWE-295 Improper Certificate Validation

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.