CASCACascade Atlas

Evidence dossier

CVE-2026-34926

CVE-2026-34926

63.9–78.9Priority evidence range
As known Jul 19, 2026, 5:00 AM UTCgen-56ccdaf9

Normalized restatement

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.

State
PUBLISHED
Published
May 21, 2026
Updated
May 22, 2026
Evidence coverage
85%
CISA KEVCatalog member

Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.

FIRST EPSS12.68%

2026-07-18 · v2026.06.15 · percentile 95.8%

Source stateNo scored conflict

Distinct CVSS assessments remain side by side; none are averaged.

Source comparison

Who said what

CISA-ADPindependent enrichment
container

CISA ADP Vulnrichment

trendmicrooriginal assertion
container

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.

CISA KEVoriginal assertion
observed_exploitation

Trend Micro Apex One (On-Premise) Directory Traversal Vulnerability

FIRST EPSSoriginal assertion
model_probability

Probability 0.126820000000; percentile 0.958190000000

Applicability

Cited product scope

Trace impact →
Trend Micro, Inc.TrendAI Apex One
[{"status": "affected", "version": "2019 (14.0)", "lessThan": "14.0.0.17079", "versionType": "semver"}]unknown
Trend Micro, Inc.TrendAI Apex One as a Service
[{"status": "affected", "version": "SaaS", "lessThan": "14.0.20731", "versionType": "semver"}]unknown
Unknown vendorUnknown product
cpe:2.3:a:trendmicro:apex_one:*:*:*:*:on-premises:windows:*:*; end excluding 14.0.0.17079supported
Unknown vendorUnknown product
cpe:2.3:a:trendmicro:apex_one:*:*:*:*:saas:windows:*:*; end excluding 14.0.20731supported

Assessments

CVSS by origin

6.7
security@trendmicro.comCVSS 3.1 · role SecondaryCVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:C/C:H/I:L/A:L
6.7
trendmicroCVSS 3.1 · role unknownCVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:C/C:H/I:L/A:L

Limitations and unknowns

  • KEV membership is authoritative for the catalog, not proof of exposure in any environment.
  • EPSS is a dated model probability and not an individual-environment prediction.
  • Affected or fixed status applies only to the exact cited product and version scope; unresolved scope remains unknown.
  • NVD-carried upstream facts remain derivative and are not independent corroboration.
  • Only NVD metrics validated under the generation-bound calculator are Public Priority eligible; direct CVE record metrics remain display-only.
  • NVD CVSS source eligibility is closed: NVD-authored, exact record-source, or registered same-CVE container origin; unmapped sources remain display-only.
  • Factor D is unknown in Public Core because no accepted canonical mapping-obligation ledger is present.
  • Core replay supports the active and immediately prior generation; retrospective valid-at replay is deferred.