CVE-2026-34926 (GCVE-0-2026-34926)

Vulnerability from cvelistv5 – Published: 2026-05-21 13:03 – Updated: 2026-05-22 12:47
VLAI CISA KEV
Summary
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.
Severity
6.7 (Medium)
CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:C/C:H/I:L/A:L
SSVC
Exploitation: active Automatable: no Technical Impact: total
CISA Coordinator (v2.0.3)
CWE
  • CWE-23 - Relative Path Traversal
Assigner
References
Impacted products
Vendor Product Version
Trend Micro, Inc. TrendAI Apex One Affected: 2019 (14.0) , < 14.0.0.17079 (semver)
    cpe:2.3:a:trendmicro:apexone_op:14.0.0.17079:*:*:*:*:*:*:*
 Create a notification for this product.
Trend Micro, Inc. TrendAI Apex One as a Service Affected: SaaS , < 14.0.20731 (semver)
    cpe:2.3:a:trendmicro:apexone_saas:14.0.0.20731:*:*:*:*:*:*:*
 Create a notification for this product.
CISA KEV
Known Exploited Vulnerability - GCVE BCP-07 Compliant
KEV entry ID: 29739c2a-9ff9-4e9f-924c-b92c406a67b7

Vulnerability ID: CVE-2026-34926

Status: Confirmed

Status Updated: 2026-05-21 00:00 UTC

Exploited: Yes

Timestamps
First Seen: 2026-05-21
Asserted: 2026-05-21
Scope
Notes: KEV entry: Trend Micro Apex One (On-Premise) Directory Traversal Vulnerability | Affected: Trend Micro / Apex One | 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. | Required action: Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable. | Due date: 2026-06-04 | Known ransomware campaign use (KEV): Unknown | Notes (KEV): https://success.trendmicro.com/en-US/solution/KA-0023430 ; https://nvd.nist.gov/vuln/detail/CVE-2026-34926
Evidence

Type: Vendor Report

Signal: Successful Exploitation

Confidence: 80%

Source: cisa-kev

Details
Cwes CWE-23
Feed CISA Known Exploited Vulnerabilities Catalog
Product Apex One
Due Date 2026-06-04
Date Added 2026-05-21
Vendorproject Trend Micro
Vulnerabilityname Trend Micro Apex One (On-Premise) Directory Traversal Vulnerability
Knownransomwarecampaignuse Unknown
References
Created: 2026-05-22 17:00 UTC | Updated: 2026-05-22 17:00 UTC
Show details on NVD website
To clipboard 

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Taxonomy of the tags.





Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

Author Source Type Date Other

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.


Detection rules are retrieved from Rulezet.