CVE WatchAug 25, 2026

CVE-2017-12617

Apache Tomcat Remote Code Execution Vulnerability

CVSS

8.1

High

EPSS

100.0%

p100

KEV

YES

Mar 25, 2022

Exploit Today

0-100

Published: Oct 4, 2017 · Last modified: Aug 25, 2026 · CWE-434

EPSS · 30d

100.0%EPSS · 30 days100.0%

2026-08-022026-08-30

KEV catalog record

Product

Apache / Tomcat

Vulnerability

Apache Tomcat Remote Code Execution Vulnerability

Added to KEV

Mar 25, 2022

Remediate by

Apr 15, 2022

Known ransomware use

Summary description

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.

Required action

Apply updates per vendor instructions.

Notes

https://nvd.nist.gov/vuln/detail/CVE-2017-12617

Technical description

When running Apache Tomcat versions 9.0.0.M1 to 9.0.0, 8.5.0 to 8.5.22, 8.0.0.RC1 to 8.0.46 and 7.0.0 to 7.0.81 with HTTP PUTs enabled (e.g. via setting the readonly initialisation parameter of the Default servlet to false) it was 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.

Official references

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