ACTIVELY EXPLOITED

CVE-2017-12617: Apache Tomcat Remote Code Execution Vulnerability

Facts
VendorApache
ProductTomcat
Actively exploitedYes
Added to CISA KEV25 Mar 2022
CISA federal deadline15 Apr 2022
Weakness (CWE)CWE-434

Required action (CISA's text)

Apply updates per vendor instructions.

Description (NVD)

When running Apache Tomcat, it is possible to upload a JSP file to the server via a specially crafted request. This JSP could then be requested and any code it contained would be executed by the server.

SOURCES

Other Apache flaws

Data from NVD, CISA KEV, FIRST EPSS and vendor advisories. Updated 10 Nov 2026.