Exploited vulnerability · CISA KEV

Is CVE-2017-12617 exploited? Yes: in CISA KEV since 25 Mar 2022

Gociux · Apache Tomcat · data: CISA KEV, CVE record, FIRST EPSS

Yes. CVE-2017-12617, Apache Tomcat Remote Code Execution Vulnerability, is being exploited in the wild. CISA added it to its Known Exploited Vulnerabilities catalog on 25 Mar 2022, 1634 days after it was published. It affects Apache Tomcat. If you run it, CISA's required action is: Apply updates per vendor instructions.

exploitedYesCISA KEV · 25 Mar 2022

ransomwareNot knownno confirmed use

EPSStop 1%among the most likely CVEs to be exploited

severity8.1CVSS 3.1 · high

US federal due15 Apr 2022BOD 22-01 deadline

What it is

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.

Vendor	Apache (41 exploited CVEs in KEV)
Product	Tomcat
Vulnerability	Apache Tomcat Remote Code Execution Vulnerability
Weakness	CWE-434
Published	3 Oct 2017
Added to KEV	25 Mar 2022
Reported by (CNA)	apache

What to do

Check whether you run it. Look for Tomcat in your asset inventory, including appliances and cloud images. Stack check lists every exploited Apache CVE at once.
Apply the fix. Apply updates per vendor instructions.
If you can't patch today, take the affected service off the internet or restrict who can reach it, and check its logs for signs of compromise since 3 Oct 2017.
Get told next time. Email alerts when CISA adds a CVE for Apache.

Other exploited CVEs in Tomcat

CVE-2026-34486: Apache Tomcat Missing Encryption of Sensitive Data Vulnerability (4 Aug 2026)
CVE-2025-24813: Apache Tomcat Path Equivalence Vulnerability (1 Apr 2025)
CVE-2016-8735: Apache Tomcat Remote Code Execution Vulnerability (12 May 2023)
CVE-2017-12615: Apache Tomcat on Windows Remote Code Execution Vulnerability (25 Mar 2022)
CVE-2020-1938: Apache Tomcat Improper Privilege Management Vulnerability (3 Mar 2022)

References

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

Questions

Is CVE-2017-12617 being exploited?

Yes. CISA added CVE-2017-12617 to the Known Exploited Vulnerabilities catalog on 25 Mar 2022, which means there is reliable evidence of exploitation in the wild.

Is CVE-2017-12617 used in ransomware attacks?

CISA does not list known ransomware use for it. That can change, and exploitation alone is reason to fix it first.

How do I fix CVE-2017-12617?

Apply updates per vendor instructions. Check Apache's advisory for the fixed versions, and if you can't patch quickly, restrict access to the affected Tomcat and watch it for signs of compromise.

Sources: CISA KEV (exploitation, ransomware use, required action, due date), the CVE record (publication date, CVSS, CNA), NVD and FIRST EPSS (live score). More: all KEV additions in March 2022 · Apache scorecard · act-now radar.

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