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CVE-2026-55119 Ubiquiti Inc CVE debrief

CVE-2026-55119 is an Improper Access Control vulnerability in UniFi Talk Application. A malicious actor with access to the network and low privileges could exploit this vulnerability to escalate privileges within the UniFi Talk Application. The vulnerability has a CVSS score of 8.1 and is classified as HIGH severity. The vulnerability affects UniFi Talk Application and has a significant impact on security teams and administrators responsible for the application.

Vendor
Ubiquiti Inc
Product
UniFi Talk Application
CVSS
HIGH 8.1
CISA KEV
Not listed in stored evidence
Original CVE published
2026-07-02
Original CVE updated
2026-07-09
Advisory published
2026-07-02
Advisory updated
2026-07-09

Who should care

Security teams and administrators responsible for UniFi Talk Application should be aware of this vulnerability and take necessary actions to mitigate it. They should review and verify patch deployment, restrict access to the application, and monitor for suspicious activity.

Technical summary

The vulnerability is caused by an Improper Access Control issue in UniFi Talk Application. An attacker with low privileges and network access could exploit this vulnerability to escalate privileges within the application. The CVSS vector for this vulnerability is CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N. The vulnerability has a significant impact on the security of the UniFi Talk Application.

Defensive priority

High priority should be given to patching or mitigating this vulnerability, as it could allow an attacker to escalate privileges within the UniFi Talk Application.

Recommended defensive actions

  • Apply the patch or update to version 5.2.2 or later
  • Restrict access to the UniFi Talk Application
  • Monitor for suspicious activity
  • Implement compensating controls
  • Review and verify patch deployment

Evidence notes

The CVE record was published on 2026-07-02T15:17:05.957Z and was last modified on 2026-07-09T13:19:26.580Z. The NVD entry is currently Analyzed. The vulnerability is an Improper Access Control issue in UniFi Talk Application. Evidence of exploitation is not available, but defenders should verify patch deployment and monitor for suspicious activity.

Sources and references

Verified primary and authoritative sources

  • CVE-2026-55119 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2026-55119

    CVE Program - Official CVE Program record with source-provided CVE metadata.

  • CVE-2026-55119 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2026-55119

    NIST National Vulnerability Database - Official NIST NVD detail page and source-specific vulnerability assessment.

Supplemental references

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.