CVE-2026-34908

CRITICALPre-NVD 10.010.0—
EchelonGraph scoreHIGH confidence

Score elevated to 10.0 because this CVE is listed on the CISA Known Exploited Vulnerabilities catalog (added 2026-06-23), indicating real-world exploitation has been confirmed by US federal agencies. a secondary CVSS source baseline 10.0 retained for reference (NVD's own analysis pending). Confidence: HIGH.

Triggered by: CISA KEV (actively exploited)
Sources: cisa_kev, epss, ghsa, secondary
Trending — 4 sources updated this weekExploited in the wild
10.0EG
EchelonGraph verdictPatch nowTreat as an emergency — this is being exploited.
  • Actively exploited in the wild (CISA-KEV)
CISA-KEV: ExploitedEPSS PROB: 85%CVSS: 10.0Exploit: cisa kev · epss top5pct · epss high · public exploitExposed: 0

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

A malicious actor with access to the network could exploit an Improper Access Control vulnerability found in UniFi OS devices to make unauthorized changes to the system.

CVSS v3
10.0
EG Score
10.0(high)
EG Risk
100(Act)
EG Risk 100/100SSVC: Act

EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).

How it’s computed
Severity100% × 45%
Exploitation100% × 40%
Automatability100% × 15%
Action: Fix now — active exploitation, automatable, high impact.
EPSS PROB
85%
EPSS %ILE
100%
KEV
⚠ Exploited

Published

May 22, 2026

Last Modified

July 23, 2026

Advisory Details (3)

Auto-updated Sep 4, 2026
⚠️ Active exploitation confirmed. Patch available. Sources: cisa.
generic🔴 Active Exploitation

CVE-2026-34910 Exploitation ITW – building a botnet (MIRAI) – PwnDefend

https://www.pwndefend.com/2026/06/09/cve-2026-34910-exploitation-itw-building-a-botnet-mirai/
cisa Patch Available🔴 Active Exploitation

Known Exploited Vulnerabilities Catalog | CISA

Known Exploited Vulnerabilities Catalog | CISA. Listed in CISA Known Exploited Vulnerabilities catalog.

https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-34908
generic
https://community.ui.com/releases/Security-Advisory-Bulletin-064-064/84811c09-4cf4-42ab-bd61-cc994445963b

Vendor Advisories for CVE-2026-34908(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 52× in last 7d / 223× 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.

Showing the most recent 100 of 710 total refreshes for this CVE.

  1. 2026-09-05 06:36 UTCGHSA enrichment
  2. 2026-09-05 02:37 UTCGHSA enrichment
  3. 2026-09-04 22:39 UTCGHSA enrichment
  4. 2026-09-04 18:42 UTCGHSA enrichment
  5. 2026-09-04 17:38 UTCCISA KEV update
  6. 2026-09-04 14:47 UTCGHSA enrichment
  7. 2026-09-04 10:48 UTCGHSA enrichment
  8. 2026-09-04 06:51 UTCEG score recompute
  9. 2026-09-04 06:51 UTCGHSA enrichment
  10. 2026-09-04 05:06 UTCEPSS rescore
  11. 2026-09-04 02:55 UTCGHSA enrichment
  12. 2026-09-03 23:00 UTCGHSA enrichment
  13. 2026-09-03 19:04 UTCGHSA enrichment
  14. 2026-09-03 15:06 UTCGHSA enrichment
  15. 2026-09-03 11:11 UTCGHSA enrichment
  16. 2026-09-03 07:16 UTCGHSA enrichment
  17. 2026-09-03 03:20 UTCGHSA enrichment
  18. 2026-09-02 23:23 UTCGHSA enrichment
  19. 2026-09-02 19:27 UTCGHSA enrichment
  20. 2026-09-02 17:33 UTCCISA KEV update
  21. 2026-09-02 15:29 UTCGHSA enrichment
  22. 2026-09-02 11:32 UTCGHSA enrichment
  23. 2026-09-02 07:37 UTCGHSA enrichment
  24. 2026-09-02 03:42 UTCGHSA enrichment
  25. 2026-09-01 23:46 UTCGHSA enrichment
Show 75 more
  1. 2026-09-01 19:51 UTCGHSA enrichment
  2. 2026-09-01 15:56 UTCGHSA enrichment
  3. 2026-09-01 12:00 UTCGHSA enrichment
  4. 2026-09-01 08:03 UTCGHSA enrichment
  5. 2026-09-01 04:06 UTCGHSA enrichment
  6. 2026-09-01 00:11 UTCGHSA enrichment
  7. 2026-08-31 20:15 UTCGHSA enrichment
  8. 2026-08-31 16:20 UTCGHSA enrichment
  9. 2026-08-31 14:19 UTCCISA KEV update
  10. 2026-08-31 12:24 UTCGHSA enrichment
  11. 2026-08-31 08:27 UTCGHSA enrichment
  12. 2026-08-31 04:29 UTCGHSA enrichment
  13. 2026-08-31 00:34 UTCGHSA enrichment
  14. 2026-08-30 20:39 UTCEG score recompute
  15. 2026-08-30 20:39 UTCGHSA enrichment
  16. 2026-08-30 19:17 UTCEPSS rescore
  17. 2026-08-30 16:44 UTCGHSA enrichment
  18. 2026-08-30 12:48 UTCGHSA enrichment
  19. 2026-08-30 08:52 UTCGHSA enrichment
  20. 2026-08-30 04:56 UTCEG score recompute
  21. 2026-08-30 04:56 UTCGHSA enrichment
  22. 2026-08-30 01:22 UTCEPSS rescore
  23. 2026-08-30 01:01 UTCGHSA enrichment
  24. 2026-08-29 21:06 UTCGHSA enrichment
  25. 2026-08-29 17:11 UTCGHSA enrichment
  26. 2026-08-29 13:16 UTCGHSA enrichment
  27. 2026-08-29 09:21 UTCGHSA enrichment
  28. 2026-08-29 05:25 UTCGHSA enrichment
  29. 2026-08-29 01:28 UTCEG score recompute
  30. 2026-08-29 01:28 UTCGHSA enrichment
  31. 2026-08-28 21:41 UTCEPSS rescore
  32. 2026-08-28 21:32 UTCGHSA enrichment
  33. 2026-08-28 21:31 UTCGHSA enrichment
  34. 2026-08-28 17:35 UTCGHSA enrichment
  35. 2026-08-28 13:37 UTCGHSA enrichment
  36. 2026-08-28 09:41 UTCGHSA enrichment
  37. 2026-08-28 05:42 UTCGHSA enrichment
  38. 2026-08-28 01:45 UTCGHSA enrichment
  39. 2026-08-27 21:50 UTCGHSA enrichment
  40. 2026-08-27 17:55 UTCGHSA enrichment
  41. 2026-08-27 17:22 UTCCISA KEV update
  42. 2026-08-27 13:59 UTCGHSA enrichment
  43. 2026-08-27 10:03 UTCGHSA enrichment
  44. 2026-08-27 06:06 UTCGHSA enrichment
  45. 2026-08-27 02:10 UTCGHSA enrichment
  46. 2026-08-26 22:15 UTCGHSA enrichment
  47. 2026-08-26 18:20 UTCEG score recompute
  48. 2026-08-26 18:19 UTCGHSA enrichment
  49. 2026-08-26 17:41 UTCCISA KEV update
  50. 2026-08-26 14:46 UTCEPSS rescore
  51. 2026-08-26 14:23 UTCGHSA enrichment
  52. 2026-08-26 10:27 UTCGHSA enrichment
  53. 2026-08-26 06:32 UTCGHSA enrichment
  54. 2026-08-26 02:36 UTCGHSA enrichment
  55. 2026-08-25 22:41 UTCGHSA enrichment
  56. 2026-08-25 18:46 UTCGHSA enrichment
  57. 2026-08-25 14:51 UTCGHSA enrichment
  58. 2026-08-25 10:56 UTCGHSA enrichment
  59. 2026-08-25 07:01 UTCGHSA enrichment
  60. 2026-08-25 03:06 UTCGHSA enrichment
  61. 2026-08-24 23:11 UTCGHSA enrichment
  62. 2026-08-24 19:16 UTCGHSA enrichment
  63. 2026-08-24 18:52 UTCCISA KEV update
  64. 2026-08-24 15:21 UTCEG score recompute
  65. 2026-08-24 15:21 UTCGHSA enrichment
  66. 2026-08-24 11:26 UTCEG score recompute
  67. 2026-08-24 11:26 UTCGHSA enrichment
  68. 2026-08-24 07:31 UTCGHSA enrichment
  69. 2026-08-24 03:36 UTCGHSA enrichment
  70. 2026-08-23 23:41 UTCGHSA enrichment
  71. 2026-08-23 19:46 UTCGHSA enrichment
  72. 2026-08-23 15:51 UTCGHSA enrichment
  73. 2026-08-23 11:56 UTCGHSA enrichment
  74. 2026-08-23 08:01 UTCGHSA enrichment
  75. 2026-08-23 04:05 UTCGHSA enrichment

Publicly available exploits

(2 references)

Working exploit code is in the public domain (1 GitHub PoC). Defenders should treat patch urgency accordingly — public PoCs typically lead to mass-exploitation within 24-72 hours.

  • GitHub PoCBishopFox/CVE-2026-34908-check
    First seen Jun 5, 2026

    Safely detect whether a UniFi OS Server is vulnerable to CVE-2026-34908

    Open source ↗
  • Nucleihttp/cves/2026/CVE-2026-34908.yaml
    First seen Jan 1, 2026

    UniFi OS - Authentication Bypass via Path Traversal (..%2f)

    Open source ↗

Frequently asked(6)

What is CVE-2026-34908?
CVE-2026-34908 is a critical vulnerability published on May 22, 2026. A malicious actor with access to the network could exploit an Improper Access Control vulnerability found in UniFi OS devices to make unauthorized changes to the system.
When was CVE-2026-34908 disclosed?
CVE-2026-34908 was first published in the National Vulnerability Database on May 22, 2026, with the most recent update on July 23, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-34908 actively exploited?
Yes. CISA added CVE-2026-34908 to the Known Exploited Vulnerabilities catalog on June 23, 2026, affecting Ubiquiti UniFi OS. KEV listing indicates confirmed exploitation in the wild; this CVE warrants immediate patching attention.
What is the CVSS score of CVE-2026-34908?
CVE-2026-34908 has a CVSS v3 base score of 10.0 (NVD).
Which products are affected by CVE-2026-34908?
CVE-2026-34908 affects Ubiquiti UniFi OS. The full affected-products list, including version ranges and fixed versions, is shown in the Affected Packages section of this page.
How do I remediate CVE-2026-34908?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-34908, 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-2026-34908

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