Vulnerability record

CVE-2017-12615

Apache Tomcat on Windows Remote Code Execution Vulnerability

HighExploitation confirmedCISA KEV Used by ransomware

What should I do?

This vulnerability is in the CISA Known Exploited Vulnerabilities catalog: attackers are using it. If you run Apache Tomcat, fix it now.

CISA required action: Apply updates per vendor instructions.

US federal civilian agencies must remediate by Apr 15, 2022.

Patch status

Official fix available since Sep 30, 2026

Apply the vendor's update to every affected system. Check the fixed-in versions below where known.

Basis: NVD patch reference

Description

When running Apache Tomcat 7.0.0 to 7.0.79 on Windows with HTTP PUTs enabled (e.g. via setting the readonly initialisation parameter of the Default 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.

Source: NIST National Vulnerability Database. Official vulnerability data, reproduced as published.

Affected products

Products affected by this vulnerability, with versions and the source of each entry
Product	Vendor	Affected versions	Source
Apache Tomcat	Apache Software Foundation	>= 7.0.0, <= 7.0.79	KEV

Sources: KEV = CISA Known Exploited Vulnerabilities catalog.

Intelligence timeline

Developments from the last 30 days, newest first.

CVSS scoredUpdateKEVSep 30, 2026
CVE-2017-12615 scored CVSS 8.1: Apache Tomcat, Apache Tomcat on Windows Remote Code Execution Vulnerability
CISA lists this as exploited in the wild and known to be used in ransomware campaigns. Unpatched Tomcat systems are exposed to active attacks now.
Basis: NIST National Vulnerability Database
Patch releasedUpdateKEVSep 30, 2026
Patch released for CVE-2017-12615: Apache Tomcat, Apache Tomcat on Windows Remote Code Execution Vulnerability
An official fix is now available for Apache Tomcat. This vulnerability is being exploited, so apply it promptly.
Basis: NVD patch reference

1 earlier event is available with a subscription. See plans.

Coverage

We have not published a story about this vulnerability yet.

References

nvd.nist.gov https://nvd.nist.gov/vuln/detail/CVE-2017-12615
breaktoprotect.blogspot.com http://breaktoprotect.blogspot.com/2017/09/the-case-of-cve-2017-12615-tomcat-7-put.html
securityfocus.com http://www.securityfocus.com/bid/100901
securitytracker.com http://www.securitytracker.com/id/1039392
access.redhat.com https://access.redhat.com/errata/RHSA-2017:3080
access.redhat.com https://access.redhat.com/errata/RHSA-2017:3081
access.redhat.com https://access.redhat.com/errata/RHSA-2017:3113
access.redhat.com https://access.redhat.com/errata/RHSA-2017:3114
access.redhat.com https://access.redhat.com/errata/RHSA-2018:0465
access.redhat.com https://access.redhat.com/errata/RHSA-2018:0466
github.com https://github.com/breaktoprotect/CVE-2017-12615
lists.apache.org https://lists.apache.org/thread.html/388a323769f1dff84c9ec905455aa73fbcb20338e3c7eb131457f708%40%3Cdev.tomcat.…
lists.apache.org https://lists.apache.org/thread.html/3d19773b4cf0377db62d1e9328bf9160bf1819f04f988315086931d7%40%3Cdev.tomcat.…
lists.apache.org https://lists.apache.org/thread.html/845312a10aabbe2c499fca94003881d2c79fc993d85f34c1f5c77424%40%3Cdev.tomcat.…
lists.apache.org https://lists.apache.org/thread.html/8fcb1e2d5895413abcf266f011b9918ae03e0b7daceb118ffbf23f8c%40%3Cannounce.to…
lists.apache.org https://lists.apache.org/thread.html/r6d03e45b81eab03580cf7f8bb51cb3e9a1b10a2cc0c6a2d3cc92ed0c%40%3Cannounce.a…
lists.apache.org https://lists.apache.org/thread.html/r9136ff5b13e4f1941360b5a309efee2c114a14855578c3a2cbe5d19c%40%3Cdev.tomcat…
security.netapp.com https://security.netapp.com/advisory/ntap-20171018-0001/
exploit-db.com https://www.exploit-db.com/exploits/42953/
synology.com https://www.synology.com/support/security/Synology_SA_17_54_Tomcat
cisa.gov https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2017-12615