CVE-2026-34926

CRITICALNVD 6.79.0▲
EchelonGraph scoreHIGH confidence

Score elevated to 9.0 because this CVE is listed on the CISA Known Exploited Vulnerabilities catalog (added 2026-05-21), indicating real-world exploitation has been confirmed by US federal agencies. NVD baseline CVSS 6.7 retained for reference. Confidence: HIGH.

Triggered by: CISA KEV (actively exploited)
Sources: cisa_kev, epss, ghsa, nvd
Trending — 3 sources updated this weekExploited in the wild
9.0EG
EchelonGraph verdictMitigate nowTreat as an emergency — this is being exploited.
  • Actively exploited in the wild (CISA-KEV)
CISA-KEV: ExploitedEPSS PROB: 0.5%CVSS: 6.7Exploit: cisa kev · ssvc activeExposed services: Not assessed

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

A directory traversal vulnerability in the Apex One (on-premise) server could allow a pre-authenticated local attacker to modify a key table on the server to inject malicious code to deploy to agents on affected installations.

This vulnerability is only exploitable on the on-premise version of Apex One and a potential attacker must have access to the Apex One Server and already obtained administrative credentials to the server via some other method to exploit this vulnerability.

CVSS v3
6.7
EG Score
9.0CRITICALhigh confidence
EG Risk
81
EG Risk 81/100CISA SSVC

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
Severity90% × 45%
Exploitation100% × 40%
Automatability0% × 15%
CISA SSVC: Track at low, Attend at medium and Act at high mission impact.
Action: No fix is confirmed yet. Restrict network exposure of the affected system or apply the vendor's mitigation within your standard update timelines at low, sooner than that at medium and as soon as possible at high mission impact, and watch the vendor's advisory for the fix.
EPSS PROB
0.5%
EPSS %ILE
43rd
KEV
⚠ Exploited

CISA SSVCTrack at low, Attend at medium and Act at high mission impact.

No fix is confirmed yet. Restrict network exposure of the affected system or apply the vendor's mitigation within your standard update timelines at low, sooner than that at medium and as soon as possible at high mission impact, and watch the vendor's advisory for the fix.

Exploitation active (CISA Vulnrichment) · Automatable no (CISA Vulnrichment) · Technical impact total (CISA Vulnrichment). Mission impact is CISA's Mission & Well-being decision point, and only you can judge it: high means the affected system is essential to your organisation's mission, or its compromise could cause irreversible harm to people. CISA's decision table

Published

May 21, 2026

Last Modified

July 23, 2026

Advisory Details (5)

Auto-updated Jun 12, 2026
⚠️ Active exploitation confirmed. No fix on record yet. Sources: cisa.
cisa🔴 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-2026-34926
generic🔴 Active Exploitation

[Updated] Alert Regarding Multiple Vulnerabilities in Trend Micro Products Including TrendAI Apex One

https://www.jpcert.or.jp/english/at/2026/at260014.html
generic

[サポートニュース]アラート/アドバイザリ:TrendAI™ Apex Oneなどで確認された複数の脆弱性について(2026年5月):TrendAI™ Apex One、Trend Micro Apex One as a Service、TrendAI Vision One™ Endpoint Security - Standard Endpoint Protection

https://success.trendmicro.com/ja-JP/solution/KA-0022974
generic🔴 Active Exploitation

ITW SECURITY BULLETIN: Apex One and Vision One – Standard Endpoint Protection (SEP) May 2026 Security Bulletin

https://success.trendmicro.com/en-US/solution/KA-0023430
generic🔴 Active Exploitation

JVNVU#90583059: Multiple vulnerabilities in Trend Micro Endpoint security products for enterprises (May 2026)

https://jvn.jp/en/vu/JVNVU90583059/

Vendor Advisories for CVE-2026-34926(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 54× in last 7d / 239× 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 1,043 total refreshes for this CVE.

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

Frequently asked(6)

What is CVE-2026-34926?
CVE-2026-34926 is a critical vulnerability published on May 21, 2026. A directory traversal vulnerability in the Apex One (on-premise) server could allow a pre-authenticated local attacker to modify a key table on the server to inject malicious code to deploy to agents on affected installations. This vulnerability is only exploitable on the on-premise version of Apex…
When was CVE-2026-34926 disclosed?
CVE-2026-34926 was first published on May 21, 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-2026-34926 actively exploited?
Yes. CISA added CVE-2026-34926 to the Known Exploited Vulnerabilities catalog on May 21, 2026, affecting Trend Micro Apex One. KEV listing indicates confirmed exploitation in the wild; this CVE warrants immediate attention. No fix is confirmed yet. Restrict network exposure of the affected system or apply the vendor's mitigation, and watch the vendor's advisory for the fix.
What is the CVSS score of CVE-2026-34926?
CVE-2026-34926 has a CVSS v3 base score of 6.7 (NVD). EchelonGraph synthesises NVD + CISA KEV + FIRST EPSS + GHSA into a combined EG score of 9.0 (CRITICAL).
Which products are affected by CVE-2026-34926?
CVE-2026-34926 affects Trend Micro Apex One.
How do I remediate CVE-2026-34926?
No fix for CVE-2026-34926 is confirmed yet. Until one is published, restrict network exposure of the affected system or apply the vendor's mitigation — for example, keep it off the internet or limit it to trusted networks — and watch the vendor's advisory for the fix. The vendor advisories EchelonGraph has for CVE-2026-34926 are linked in the Vendor Advisories panel on this page.

Dependency Blast Radius

Explore the affected products and dependency analysis for CVE-2026-34926

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