Directory Traversal in Trend Micro Apex One (On-Premise)
CVE-2026-34926 is a directory traversal vulnerability affecting the on-premise Trend Micro Apex One server. According to the provided content, a pre-authenticated local attacker can exploit relative path traversal behavior to bypass intended filesystem restrictions, modify a key table on the Apex One server, and inject malicious code that is then deployed to Apex One agents on affected installations. The issue is limited to on-premise deployments; Trend Micro stated that exploitation requires the attacker to already have access to the Apex One Server and to have obtained administrative credentials to that server through another method. The vulnerability has been reported as actively exploited in the wild and has been added to CISA's Known Exploited Vulnerabilities catalog.
Impact, mitigation & remediation
What it means. What to do now. Patch path, mitigations, and the assume-compromise checklist.
Impact
What an attacker gets, and what they’ve been doing with it.
Mitigation
If you can’t patch tonight, do this now.
Remediation
Patch, then assume compromise.
Exploits
No valid public exploits. Mallory filtered out 1 candidate as fakes, detection scripts, or README-only repos.
All candidate exploits were filtered out by Mallory's validation.
Affected products & vendors
Products and vendors Mallory has correlated with this vulnerability. Open in Mallory to drill down to specific CPE configurations and version ranges.
Vendor-confirmed product mapping. Mallory continuously reconciles this list against your asset inventory.
Recent activity
53 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
A relative directory path traversal vulnerability in Trend Micro Apex One that affects on-premise deployments and can allow an attacker with administrative access to the Apex One Server to modify a key table and inject malicious code for deployment to agents.
A directory traversal flaw in Trend Micro Apex One (on-premise) that allows a local attacker with administrative credentials to modify server tables and inject malicious code.
A critical directory traversal vulnerability in on-premise Trend Micro Apex One that can allow a pre-authenticated local attacker to manipulate file paths, access restricted directories, modify a key database table, and inject malicious code that can be distributed to connected endpoint agents.
A directory traversal vulnerability affecting on-premise Trend Micro Apex One that allows a pre-authenticated local attacker with access to the Apex One Server and administrative credentials to modify a key table and inject malicious code for deployment to agents.
The version that knows your environment.
Query your assets running an affected version, and investigate the blast radius.
Every observed campaign linking this CVE to a named adversary.
Malware families riding this exploit, with evidence and IOCs.
YARA, Sigma, Snort, and vendor rules, auto-deployed to your SIEM.
Cross-references every affected SKU, including bundled OEM variants.
Community discussion across Reddit, Mastodon, and other social sources.