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

Vulnerability from cvelistv5 – Published: 2026-05-21 13:03 – Updated: 2026-05-22 12:47
VLAI CISA Previdian
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 · CISA-ADP (v2.0.3)
Decision recorded 2026-05-22 03:55 UTC
CWE
  • CWE-23 - Relative Path Traversal
Assigner
References
Impacted products
Vendor Product Version CPE status
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
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
Previdian
Known Exploited Vulnerability - GCVE BCP-07 Compliant
KEV entry ID: 66f8069b-2f96-4ec5-ab9f-22789e603cdf

Vulnerability ID: CVE-2026-34926

Status: Confirmed

Status Updated: 2026-06-01 13:29 UTC

Exploited: Yes

Timestamps
First Seen: 2026-06-01
Asserted: 2026-06-01
Scope
Notes: KEVIntel entry: 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... | Affected: Trend Micro, Inc. / TrendAI Apex One, TrendAI Apex One as a Service | CVSS: 6.7 (MEDIUM) | EPSS: 0.01112 | Used in malware: unknown | Not yet in CISA KEV: False
Evidence

Type: Public Report

Signal: Successful Exploitation

Confidence: 70%

Source: kevintel

Details
Feed KEVIntel (kevintel.com)
Title 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...
Vendor Trend Micro, Inc.
Product TrendAI Apex One, TrendAI Apex One as a Service
Added Date 2026-06-01T13:29:30.761Z
Cvss Score 6.7
Epss Score 0.01112
Cvss Severity MEDIUM
Epss Percentile 0.61676
Used In Malware unknown
Ahead Of Cisa Kev 
{
  "count": 1,
  "unit": "day"
}
Not Yet In Cisa Kev False
References
Created: 2026-06-23 14:03 UTC | Updated: 2026-07-10 06:14 UTC
Show details on NVD website
To clipboard 

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Tags
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.


Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.