Risk Letters

Exploited vulnerability

CVE-2026-34926

TLP:CLEAR

Trend Micro Apex One (On-Premise) Directory Traversal Vulnerability

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.

Facts

  • Vendor: Trend Micro
  • Product: Apex One
  • CVSS: 6.7
  • EPSS (probability of exploitation within 30 days): 13.4 %
  • On CISA's Known Exploited Vulnerabilities list since: 21 May 2026
  • First known exploitation: 21 May 2026
  • CISA's deadline for US federal agencies: 4 June 2026
  • Weakness: CWE-23
  • First seen by Risk Letters: 21 May 2026

Members see which Nordic sectors the flaw hits, and what to do about it.

Get the full brief

Data: NVD (public domain), CISA KEV, FIRST EPSS, MITRE ATT&CK, AlienVault OTX. NVD