A relative directory path traversal vulnerability (CVE-2026-34926) in Trend Micro’s Apex One platform has been exploited in zero-day attacks, the company confirmed. “TrendAI has observed at least one attempt to exploit this vulnerability in the wild,” Trend Micro noted, and credited the incident response team of its TrendAI enterprise cybersecurity business for reporting it. About Trend Micro Apex One Trend Micro Apex One is a security platform that protects all the devices in an organization … More → The post Actively exploited Trend Micro Apex One flaw gets CISA warning (CVE-2026-34926) appeared first on Help Net Security .

CISA has added two new vulnerabilities to its Known Exploited Vulnerabilities (KEV) Catalog , based on evidence of active exploitation. CVE-2025-34291 Langflow Origin Validation Error Vulnerability CVE-2026-34926 Trend Micro Apex One (On-Premise) Directory Traversal Vulnerability These types of vulnerabilities are frequent attack vectors for malicious cyber actors and pose significant risks to the federal enterprise. Binding Operational Directive (BOD) 22-01: Reducing the Significant Risk of Known Exploited Vulnerabilities established the KEV Catalog as a living list of known Common Vulnerabilities and Exposures (CVEs) that carry significant risk to the federal enterprise. BOD 22-01 requires Federal Civilian Executive Branch (FCEB) agencies to remediate identified vulnerabilities by the due date to protect FCEB networks against active threats. See the BOD 22-01 Fact Sheet for more information. Although BOD 22-01 only applies to FCEB agencies, CISA strongly urges all organizations to reduce their exposure to cyberattacks by prioritizing timely remediation of KEV Catalog vulnerabilities as part of their vulnerability management practice. CISA will continue to add vulnerabilities to the catalog that meet the specified criteria . 

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.