CVE-2026-34926
Trend Micro Apex One (On-Premise) Directory Traversal Vulnerability - [Actively Exploited]
Description
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.
INFO
Published Date :
May 21, 2026, 2:16 p.m.
Last Modified :
May 22, 2026, 12:47 p.m.
Remotely Exploit :
No
Source :
[email protected]
CISA KEV (Known Exploited Vulnerabilities)
For the benefit of the cybersecurity community and network defenders—and to help every organization better manage vulnerabilities and keep pace with threat activity—CISA maintains the authoritative source of vulnerabilities that have been exploited in the wild.
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.
Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.
Unknown
https://success.trendmicro.com/en-US/solution/KA-0023430 ; https://nvd.nist.gov/vuln/detail/CVE-2026-34926
Affected Products
The following products are affected by CVE-2026-34926
vulnerability.
Even if cvefeed.io is aware of the exact versions of the
products
that
are
affected, the information is not represented in the table below.
CVSS Scores
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS 3.1 | MEDIUM | 7f7bd7df-cffe-4fdb-ab6d-859363b89272 | ||||
| CVSS 3.1 | MEDIUM | [email protected] | ||||
| CVSS 3.1 | MEDIUM | MITRE-CVE |
Solution
- Apply the latest Apex One security patches.
- Ensure administrative access to the server is restricted.
- Monitor server for unauthorized modifications.
Public PoC/Exploit Available at Github
CVE-2026-34926 has a 6 public
PoC/Exploit available at Github.
Go to the Public Exploits tab to see the list.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2026-34926.
| URL | Resource |
|---|---|
| https://jvn.jp/en/vu/JVNVU90583059/ | Third Party Advisory |
| https://success.trendmicro.com/en-US/solution/KA-0023430 | Vendor Advisory |
| https://success.trendmicro.com/ja-JP/solution/KA-0022974 | Vendor Advisory |
| https://www.jpcert.or.jp/english/at/2026/at260014.html | Third Party Advisory |
| https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-34926 | Third Party Advisory US Government Resource |
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2026-34926 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2026-34926
weaknesses.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Actively exploited CVE scanners from CISA KEV + Twitter trends - Drupal SQLi, PAN-OS RCE, Android ADBD, GHE RCE, BeyondTrust, Defender, and more
Python
CVE-2026-34926
None
Python
Audit CVE impact, patch status, remediation progress, and verification results across systems.
Makefile Go
📡 PoC auto collect from GitHub. ⚠️ Be careful Malware.
security cve exploit poc vulnerability
List of real-world threats against endpoint protection software
antivirus security incidents exploits vulnerability endpoint-protection
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2026-34926 vulnerability anywhere in the article.
-
TheCyberThrone
CISA adds Langflow and Trend Micro Apex One to KEV
May 22, 2026CVE-2025-34291 — Langflow Origin Validation Error (RCE)CVSS: 9.4CWE: CWE-346 — Origin Validation ErrorAffected Versions: Langflow ≤ 1.6.9Vulnerability SummaryResearchers at Obsidian Securi ... Read more
-
CybersecurityNews
CISA Warns of Trend Micro Apex One Vulnerability Exploited in Attacks
The U.S. Cybersecurity and Infrastructure Security Agency (CISA) has added a critical vulnerability in Trend Micro Apex One to its Known Exploited Vulnerabilities (KEV) catalog, warning organizations ... Read more
-
The Hacker News
CISA Adds Exploited Langflow and Trend Micro Apex One Vulnerabilities to KEV
The U.S. Cybersecurity and Infrastructure Security Agency (CISA) on Thursday added two security flaws impacting Langflow and Trend Micro Apex One to its Known Exploited Vulnerabilities (KEV) catalog, ... Read more
The following table lists the changes that have been made to the
CVE-2026-34926 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
-
Initial Analysis by [email protected]
May. 22, 2026
Action Type Old Value New Value Added CPE Configuration OR *cpe:2.3:a:trendmicro:apex_one:*:*:*:*:saas:windows:*:* versions up to (excluding) 14.0.20731 *cpe:2.3:a:trendmicro:apex_one:*:*:*:*:on-premises:windows:*:* versions up to (excluding) 14.0.0.17079 Added Reference Type Trend Micro, Inc.: https://jvn.jp/en/vu/JVNVU90583059/ Types: Third Party Advisory Added Reference Type Trend Micro, Inc.: https://success.trendmicro.com/en-US/solution/KA-0023430 Types: Vendor Advisory Added Reference Type Trend Micro, Inc.: https://success.trendmicro.com/ja-JP/solution/KA-0022974 Types: Vendor Advisory Added Reference Type CISA-ADP: https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-34926 Types: Third Party Advisory, US Government Resource Added Reference Type Trend Micro, Inc.: https://www.jpcert.or.jp/english/at/2026/at260014.html Types: Third Party Advisory -
CVE Modified by 134c704f-9b21-4f2e-91b3-4a467353bcc0
May. 21, 2026
Action Type Old Value New Value Added Reference https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-34926 -
CVE CISA KEV Update by 9119a7d8-5eab-497f-8521-727c672e3725
May. 21, 2026
Action Type Old Value New Value Added Date Added 2026-05-21 Added Due Date 2026-05-21 Added Required Action 2026-05-21 Added Vulnerability Name 2026-05-21 -
New CVE Received by [email protected]
May. 21, 2026
Action Type Old Value New Value Added Description 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. Added CVSS V3.1 AV:L/AC:H/PR:H/UI:N/S:C/C:H/I:L/A:L Added CWE CWE-23 Added Reference https://jvn.jp/en/vu/JVNVU90583059/ Added Reference https://success.trendmicro.com/en-US/solution/KA-0023430 Added Reference https://success.trendmicro.com/ja-JP/solution/KA-0022974 Added Reference https://www.jpcert.or.jp/english/at/2026/at260014.html