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.
CVE-2026-55116
CRITICALPre-NVD 9.09.0—
EchelonGraph scoreHIGH confidence
Score 9.0 from GitHub Security Advisory (severity: CRITICAL) published 2026-07-02. a secondary CVSS source baseline 9.0; sources differ by 0.0.
Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
9.0
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
- High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS: 0%CVSS: 9.0Exploit: NoneExposed: 0
No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.
- CVSS v3
- 9.0
- EG Score
- 9.0(high)
- EPSS
- 12.5%
- KEV
- Not listed
Published
July 2, 2026
Last Modified
July 2, 2026
Advisory Details (1)
Auto-updated Jul 2, 2026No patch confirmed yet.
Vendor Advisories for CVE-2026-55116(1)
These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.
Frequently asked(5)
What is CVE-2026-55116?
CVE-2026-55116 is a critical vulnerability published on July 2, 2026. 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.
When was CVE-2026-55116 disclosed?
CVE-2026-55116 was first published in the National Vulnerability Database on July 2, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-55116 actively exploited?
CVE-2026-55116 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 12.5% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2026-55116?
CVE-2026-55116 has a CVSS v3 base score of 9.0 (NVD).
How do I remediate CVE-2026-55116?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-55116, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.
Dependency Blast Radius
Explore the affected products and dependency analysis for CVE-2026-55116
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