CVE-2026-34926: Trend Micro TrendAI Apex One · Relative Path Traversal
Affects Trend Micro TrendAI Apex OneSource CVE Database V5
Exploited in the wild · KEV due 4 Jun 2026 · 13% EPSS : apply the vendor's fix or mitigations to Trend Micro TrendAI Apex One now.
Data as of 30 Oct 2026, 11:52 UTC
- KEV deadline
- US federal agencies must patch by this date; a sensible deadline for everyone else. Other KEV due dates
- EPSS
- 13.4% chance of exploitation in 30 days – higher than 96% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:C/C:H/I:L/A:LExploitation evidence
t = 0 is the CVE’s publication on cve.org
Disclosed: evidence found.
CVE published 21 May 2026
Detectable: no evidence on record.
No public nuclei template indexed
Weaponized: evidence found.
Public exploit code: GitHub proofs of concept
Exploited in the wildExploited: evidence found.
Listed in CISA KEV the same day as disclosure
Observed by OffSeq MirageSeen by Mirage: no evidence on record.
No attack traffic recorded by OffSeq Mirage sensors
Timeline
CVE ID reserved
by Trend Micro, Inc.
, 51 days before disclosure
CVE published
on cve.org
, t = 0
In Threat Radar
record ingested
, 41 minutes after disclosure
Added to CISA KEV (opens in a new tab)
exploitation confirmed
, the same day as disclosure
KEV remediation due
US federal deadline
, 14 days after disclosure
A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), GitHub proofs of concept, CISA KEV (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 30 Oct 2026.
What to do
Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.
Affected software
| Product | Affected | Fixed in |
|---|---|---|
| Trend Micro, Inc.TrendAI Apex One | Affected
| Fixed in– |
| Trend Micro, Inc.TrendAI Apex One as a Service | Affected
| Fixed in– |
CPE configurations (2)
cpe:2.3:a:trendmicro:apexone_op:14.0.0.17079:*:*:*:*:*:*:*cpe:2.3:a:trendmicro:apexone_saas:14.0.0.20731:*:*:*:*:*:*:*
Description
CVE-2026-34926 is a directory traversal vulnerability in the on-premise version of Trend Micro's TrendAI Apex One server. It allows a pre-authenticated local attacker with administrative credentials on the server to modify a key table, potentially injecting malicious code that could be deployed to agents. Exploitation requires prior administrative access to the Apex One server and is limited to the on-premise deployment. The vulnerability has a CVSS score of 6.7, indicating medium severity. No official patch or remediation information is currently available, and no known exploits are reported in the wild.
References
- success.trendmicro.com/en-US/solution/KA-0023430 (opens in a new tab)
- success.trendmicro.com/ja-JP/solution/KA-0022974 (opens in a new tab)
- jvn.jp/en/vu/JVNVU90583059/ (opens in a new tab)
- jpcert.or.jp/english/at/2026/at260014.html (opens in a new tab)
- cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-34926 (opens in a new tab)