Vulnerability

CVE-2026-34926

Medium· 6.7KEVCVSS6.7EPSS1%

.rules3/5

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

Trend Micro Apex One (on-premise) contains a directory traversal vulnerability that 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.

Threat signal

77/100

High

Severity

medium

CVSS

6.7

EPSS

Active

KEV

CISA KEV — actively exploited

9d overdue

AffectedTrend Micro — Apex One

Added to KEV

2026-05-21

Federal patch due (BOD 22-01)

2026-06-04

Required action (CISA verbatim)

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

Vendor advisory + references

CISA description: “Trend Micro Apex One (on-premise) contains a directory traversal vulnerability that 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.”

CVSS

v3.1Open in FIRST calculator →

6.7/ 10MEDIUMCVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:C/C:H/I:L/A:L

Attack VectorLocalRequires local access — shell, console, or local app.
Attack ComplexityHighRequires conditions outside attacker's control (race, brute-force, configuration
Privileges RequiredHighAdmin / root privileges required.
User InteractionNoneFully automated — no victim action needed.
ScopeChangedImpact extends beyond the vulnerable component (e.g. sandbox escape).
Confidentiality ImpactHighTotal disclosure of sensitive data.
Integrity ImpactLowSome data modification; attacker doesn't fully control extent.
Availability ImpactLowReduced performance / interruptions.

EPSS

Exploit prediction · 30-day horizonFIRST.org →

1.00%

probability of exploitation in next 30 days

p77

higher than 77% of all CVEs

3-day trend↓ 0pp

Mid-pack — moderate exploitation likelihood.

Vendor VEX

No VEX statements published for CVE-2026-34926. Vendors publish VEX (Vulnerability Exploitability eXchange) to assert per-product whether a CVE is actually exploitable in their distribution.

SSVCAttend

Active exploitation with limited impact — coordinate patching

exploitation: active
automatable: no
impact: partial
mission: support

Lifecycle

2026-05-21Added to CISA KEVransomware: Unknown
2026-05-21Published
2026-06-04Federal patch due (BOD 22-01)
2026-06-12Last modified1 source

No source-event history recorded yet. New revisions will appear here as ingestors re-fetch this CVE.