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NVD / CVE Program· CNA trendmicro

CVE-2026-34926: A directory traversal vulnerability in the Apex One (on-premise) server could allow a pre-authenticated local attacker to modify a key table…

Noroxi assessment

Priority: This week (action score 60/100)

  • CISA has confirmed exploitation in the wild (May 21, 2026). Remediation deadline for US federal agencies: Jun 4, 2026.
  • Probability of exploitation in the next 30 days: 13.4% (FIRST EPSS); higher than 96.4% of all records.
  • Someone with local access to the system can trigger it. Administrator privileges are required. No user action is required. Special conditions such as timing or configuration are required.
  • Fixed version: Trend Micro, Inc. TrendAI Apex One 14.0.0.17079; Trend Micro, Inc. TrendAI Apex One as a Service 14.0.20731.

Don’t wait for the next maintenance window. Upgrade to Trend Micro, Inc. TrendAI Apex One 14.0.0.17079; Trend Micro, Inc. TrendAI Apex One as a Service 14.0.20731 or later.

Generated automatically from the record's data: CVSS (NVD and CNA), CISA KEV and SSVC, FIRST EPSS, exploit sources, fixed versions. How we calculate it

Primary sources: NVD · CVE.org · CISA KEV · FIRST EPSS

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.

MediumCVSS 6.7 · v3.1KEVWeaponized Fix available
Published
May 21, 2026
Updated
Jul 23, 2026
EPSS
13.4% · 96th percentile

Report tools

JSON

Action score

60

This week

Don’t wait for the next maintenance window.

CVSS
26 / 40 · 6.7 / 10
CISA KEV
30 / 30 · Listed
EPSS
4 / 30 · 13.4%

CISA SSVC decision

Exploitation
active
Automatable
no
Technical impact
total

Vulnrichment: CISA's decision-tree inputs.

CNA vs NVD score

NVD
—
CNA · trendmicro
6.7
NVD has not scored this yet; the score shown is the CNA’s.

The score given by the assigning authority versus NVD’s independent score. A gap means the severity is contested.

Actively exploited in the wild

CISA added this to its Known Exploited Vulnerabilities catalog on May 21, 2026. That signals real attacks, not theory.

Remediation deadline for US federal agencies: Jun 4, 2026.

Get told when this record changes

  • In CISA KEV: exploitation in the wild confirmed
  • Weaponized exploit exists
  • A fix has been released

If any of these changes, we'll tell you in the daily email digest.

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When you'll hear from us

  • when it enters CISA KEV
  • when exploit code appears or is weaponized
  • when the record is updated (including a fixed version)
  • when EPSS rises 20 points in a week

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Noroxi analysis

What does it mean in your environment?

The assessment above is generated automatically from the record's data; it doesn't know your environment. Our team verifies on your systems whether this vulnerability is actually exploitable and which mitigation is enough.

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Affected systems

Is your version affected?

Pick the product and type the version you run. It's compared with this record's version ranges in your browser; the version isn't sent anywhere.

VendorProduct
trendmicroapex one

Affected versions

NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.

  • trendmicro apex onebefore 14.0.0.17079
  • trendmicro apex onebefore 14.0.20731

Versions reported by the vendor

Affected version ranges reported by the assigning authority (trendmicro). Independent of NVD's CPE analysis and usually ahead of it.

  • Trend Micro, Inc. TrendAI Apex One

    • 2019 (14.0) and later · before 14.0.0.17079affected · semver

  • Trend Micro, Inc. TrendAI Apex One as a Service

    • SaaS and later · before 14.0.20731affected · semver

Same product

trendmicro: all records

Other highest-scoring records for the same primary product.

  • CVE-2025-54948A vulnerability in Trend Micro Apex One (on-premise) management console could allow a pre-authenticated remote attacker to upload malicious…KEV
    79This week
  • CVE-2020-8599Trend Micro Apex One (2019) and OfficeScan XG server contain a vulnerable EXE file that could allow a remote attacker to write arbitrary…KEV
    73This week
  • CVE-2020-8467A migration tool component of Trend Micro Apex One (2019) and OfficeScan XG contains a vulnerability which could allow remote attackers to…KEV
    68This week

Published before and after this one in the same product

  • ← EarlierCVE-2025-71216May 21, 2026 · A time-of-check time-of-use vulnerability in the Trend Micro Apex One (mac) agent cache mechanism could allow a local attacker to escalate…
    31Monitor
  • ← EarlierCVE-2025-71217May 21, 2026 · An origin validation error vulnerability in the Trend Micro Apex One (mac) agent self-protection mechanism could allow a local attacker to…
    31Monitor
  • Later →CVE-2026-34927May 21, 2026 · An origin validation vulnerability in the Apex One/SEP agent could allow a local attacker to escalate privileges on affected installations.
    31Monitor

Remediation

Which version to upgrade to

Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.

Product / packageFixed versionSource
Trend Micro, Inc. TrendAI Apex One14.0.0.17079Vendor (CNA)
Trend Micro, Inc. TrendAI Apex One as a Service14.0.20731Vendor (CNA)

Exploit status

Weaponized

A ready exploit tool or active in-the-wild use is known for this vulnerability. This should be your top priority.

Evidence

  • Proof-of-concept repository on GitHub ×1

Noroxi does not host or link to exploit code. Metasploit module names and Nuclei template ids are shown (names, not code); Exploit-DB entries and PoC repositories are given as counts only.

Public exploit evidence
SourceKindDate
Proof-of-concept repository on GitHubstars:02026-05-22

Research context

For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.

Timeline

From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.

  1. CISA KEVsame day
  2. Published
  3. First PoC+1 d
  4. TodayNov 11, 2026+174 d
EPSS, last 120 days

FIRST EPSS daily score; only changes of 0.01 or more are recorded (step chart).

Patch and commit links

Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.

No commit or PR link among the references.

Credits

All researchers

Finders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.

No credits in the CNA record.

Variant candidates

Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.

No nightly-computed relations.

Chain candidates

An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.

—

Bug bounty scope

No known public program.

Source: bounty-targets-data (public HackerOne, Bugcrowd, Intigriti, YesWeHack listings).

Technical details

Attack conditions

  • Someone with local access to the system can trigger it.
  • Administrator privileges are required.
  • No user action is required.
  • Special conditions such as timing or configuration are required.

If successful

Confidentiality
high · data can be read
Integrity
low · data or configuration can be modified
Availability
low · the service can be disrupted

Impact can extend beyond the vulnerable component (scope changes).

Attack vector
Local
Attack complexity
High
Privileges required
High
User interaction
None
Scope
Changed
Confidentiality impact
High
Integrity impact
Low
Availability impact
Low

Weakness class (CWE)

CWE-23 · Relative Path Traversal

CVSS vector

CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:C/C:H/I:L/A:L

nvd-secondary

Attack context

MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.

ATT&CK techniques

—

Change log

  1. Fix✗ → ✓

For records you follow, these changes also arrive as notifications. →

References

Show all references (4 more)

Vendor advisories and official records. Exploit/PoC links are deliberately left out.

All records