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: 58%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
58%
EPSS %ILE
99%
KEV
⚠ Exploited

Published

May 22, 2026

Last Modified

July 23, 2026

Advisory Details (3)

Auto-updated Jul 31, 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 49× in last 7d / 229× 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 440 total refreshes for this CVE.

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

Publicly available exploits

(1 reference)

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 ↗

Related CVEs(same CWE)

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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