CVE-2026-55110

MEDIUMNVD 6.17.5▲
EchelonGraph scoreMEDIUM confidence

Score 7.5 from GitHub Security Advisory (severity: HIGH) published 2026-07-02. NVD baseline CVSS 6.1; sources differ by 1.4.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, nvd
6.1
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS: 0%CVSS: 6.1Exploit: NoneExposed: 0

No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.

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.

CVSS v3
6.1
EG Score
7.5(medium)
EPSS
3.9%
KEV
Not listed

Published

July 2, 2026

Last Modified

July 9, 2026

Advisory Details (1)

Auto-updated Jul 3, 2026
No patch confirmed yet.
generic
https://community.ui.com/releases/Security-Advisory-Bulletin-066-066/984eceb3-49c8-4227-942d-671c289b3afc

Vendor Advisories for CVE-2026-55110(1)

These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Data Freshness Timeline

(refreshed 11× in last 7d / 64× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

  1. 2026-07-22 14:08 UTCEPSS rescore
  2. 2026-07-21 15:25 UTCEPSS rescore
  3. 2026-07-20 17:08 UTCEPSS rescore
  4. 2026-07-19 14:31 UTCEPSS rescore
  5. 2026-07-19 14:31 UTCEPSS rescore
  6. 2026-07-19 02:29 UTCEPSS rescore
  7. 2026-07-18 10:04 UTCEPSS rescore
  8. 2026-07-17 02:48 UTCGHSA enrichment
  9. 2026-07-16 17:03 UTCEPSS rescore
  10. 2026-07-16 15:38 UTCGHSA enrichment
  11. 2026-07-16 04:23 UTCGHSA enrichment
  12. 2026-07-15 17:14 UTCGHSA enrichment
  13. 2026-07-15 16:57 UTCEPSS rescore
  14. 2026-07-15 16:57 UTCEPSS rescore
  15. 2026-07-15 06:03 UTCGHSA enrichment
  16. 2026-07-15 02:00 UTCEPSS rescore
  17. 2026-07-15 02:00 UTCEPSS rescore
  18. 2026-07-14 18:34 UTCGHSA enrichment
  19. 2026-07-14 07:25 UTCGHSA enrichment
  20. 2026-07-13 22:31 UTCEPSS rescore
  21. 2026-07-13 20:17 UTCGHSA enrichment
  22. 2026-07-13 09:08 UTCGHSA enrichment
  23. 2026-07-13 06:13 UTCEPSS rescore
  24. 2026-07-13 06:13 UTCEPSS rescore
  25. 2026-07-12 21:58 UTCGHSA enrichment
Show 39 more
  1. 2026-07-12 10:49 UTCGHSA enrichment
  2. 2026-07-12 05:46 UTCEPSS rescore
  3. 2026-07-11 23:41 UTCGHSA enrichment
  4. 2026-07-11 12:32 UTCGHSA enrichment
  5. 2026-07-11 08:27 UTCEPSS rescore
  6. 2026-07-11 08:27 UTCEPSS rescore
  7. 2026-07-11 01:23 UTCGHSA enrichment
  8. 2026-07-10 14:14 UTCGHSA enrichment
  9. 2026-07-10 03:04 UTCGHSA enrichment
  10. 2026-07-09 19:10 UTCEPSS rescore
  11. 2026-07-09 19:10 UTCEPSS rescore
  12. 2026-07-09 19:01 UTCNVD updateCVSS v3 → 6.1 · severity → MEDIUM
  13. 2026-07-09 15:55 UTCGHSA enrichment
  14. 2026-07-09 04:46 UTCGHSA enrichment
  15. 2026-07-08 17:35 UTCGHSA enrichment
  16. 2026-07-08 15:16 UTCEPSS rescore
  17. 2026-07-08 15:16 UTCEPSS rescore
  18. 2026-07-08 06:26 UTCGHSA enrichment
  19. 2026-07-07 19:18 UTCGHSA enrichment
  20. 2026-07-07 13:46 UTCEPSS rescore
  21. 2026-07-07 13:46 UTCEPSS rescore
  22. 2026-07-07 07:58 UTCGHSA enrichment
  23. 2026-07-06 20:49 UTCGHSA enrichment
  24. 2026-07-06 16:27 UTCEPSS rescore
  25. 2026-07-06 16:27 UTCEPSS rescore
  26. 2026-07-06 09:40 UTCGHSA enrichment
  27. 2026-07-05 22:29 UTCGHSA enrichment
  28. 2026-07-05 11:21 UTCGHSA enrichment
  29. 2026-07-05 02:31 UTCEPSS rescore
  30. 2026-07-05 02:30 UTCEPSS rescore
  31. 2026-07-05 00:12 UTCGHSA enrichment
  32. 2026-07-04 12:58 UTCGHSA enrichment
  33. 2026-07-04 06:31 UTCEPSS rescore
  34. 2026-07-04 06:31 UTCEPSS rescore
  35. 2026-07-04 01:50 UTCGHSA enrichment
  36. 2026-07-03 14:40 UTCGHSA enrichment
  37. 2026-07-03 03:31 UTCGHSA enrichment
  38. 2026-07-02 16:23 UTCEG score recompute
  39. 2026-07-02 16:23 UTCGHSA enrichment

Frequently asked(5)

What is CVE-2026-55110?
CVE-2026-55110 is a medium vulnerability published on July 2, 2026. 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.
When was CVE-2026-55110 disclosed?
CVE-2026-55110 was first published in the National Vulnerability Database on July 2, 2026, with the most recent update on July 9, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-55110 actively exploited?
CVE-2026-55110 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 3.9% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2026-55110?
CVE-2026-55110 has a CVSS v3 base score of 6.1 (NVD). EchelonGraph synthesises NVD + CISA KEV + FIRST EPSS + GHSA into a combined EG score of 7.5.
How do I remediate CVE-2026-55110?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-55110, 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-2026-55110

Explore →

Is Your Infrastructure Affected by CVE-2026-55110?

EchelonGraph automatically scans your cloud infrastructure and maps CVE exposure using blast radius analysis.

Start Free Scan →Browse All CVEs