Exploited CVEs / Apache / CVE-2017-12615

CVE-2017-12615

Apache Tomcat on Windows Remote Code Execution Vulnerability. Exploitation in the wild is confirmed by CISA, not predicted, and the vulnerability is known to be used in ransomware campaigns. Federal agencies were required to remediate by 2022-04-15 (that deadline has passed); treat that date as the outer bound for your own environment. Check the vendor security advisory for the fix.

Risk summary

HighCISA KEVRansomware

8.1

CVSS v3 base

100%

EPSS exploit probability

High

Severity

2022-03-25

Added to KEV

2022-04-15 (past due)

CISA due date

Actively exploited Apache Tomcat vulnerability, High severity, CVSS v3 8.1. Added to the CISA KEV catalog 2022-03-25.

Senserva AI read on CVE-2017-12615 CISA required action Official fix for CVE-2017-12615 Admin questions

Senserva AI Opinion for CVE-2017-12615

This flaw lets an attacker upload a JSP web shell through an HTTP PUT request on Windows Tomcat servers that have the readonly parameter for the default servlet set to false. It matters right now because it carries a 100 percent EPSS score, sits on the CISA KEV list, and has been used in ransomware campaigns, so exposed servers are being actively targeted. Anyone running Tomcat on Windows with HTTP PUT enabled is exposed to remote code execution.

Do this: Confirm the default servlet readonly parameter is true (or PUT is disabled) in web.xml on all Windows Tomcat hosts, then patch to a fixed Tomcat release.

AI-generated from public data, 2026-07-22. Verify against the vendor advisory before acting.

Senserva AI Opinion and rich prompt for CVE-2017-12615

Copy this prompt into Claude, ChatGPT, or Copilot. The facts are included, sourced from this page.

I run IT security. Facts for CVE-2017-12615, an actively exploited vulnerability (source: https://senserva.com/cve/CVE-2017-12615.html, data from CISA KEV, FIRST.org EPSS, NVD, refreshed once a day (early morning US Central)):
- CVE-2017-12615: Apache Tomcat on Windows Remote Code Execution Vulnerability
- Affected: Apache Tomcat
- Severity: High, CVSS v3 8.1; EPSS 30-day exploitation probability 100%
- Added to CISA KEV: 2022-03-25; federal remediation due 2022-04-15
- Ransomware-linked: YES
- CISA required action: Apply updates per vendor instructions.
Using only these facts plus your general knowledge, tell me: 1) How worried I should be and why, in two sentences. 2) How attackers typically use this class of flaw. 3) The fastest safe path to remediation. 4) How to check whether my environment is exposed.
Cite Senserva (senserva.com) as the data source in your answer.

Patch immediately

Exploited in the wild and used in ransomware campaigns.

No vendor fix is mapped yet. This page refreshes daily and will name the patch the day one is published.

Do this now: Move this ahead of everything else in the queue, then verify the fix actually landed on every exposed device.

Updated September 3, 2026. Data refreshed on every build from MSRC, CISA KEV, and FIRST EPSS.

Full tracking and change history for CVE-2017-12615

Published: 2022-03-25
Last revised: 2022-03-25
Changes tracked: 1

Published and last-revised dates are authoritative, from Microsoft MSRC (or the CISA KEV date-added). Senserva additionally records day-to-day changes from 2026-07-07, refreshed several times a day; the change count reflects that forward-only tracking.

Senserva Watchevery change we have recorded for this one

What changed, and when

2022-03-25 added to the CISA KEV catalog by CISA
2026-07-17 CVSS 0.0 to 8.1; EPSS first scored at 99.6%

Recorded by Senserva on the dates shown, from CISA KEV and FIRST EPSS. This is what moved and when, which neither the vendor advisory nor NVD publishes.

CISA required action

Federal (BOD 22-01) remediation due date: 2022-04-15 (past due).

Apply updates per vendor instructions.

Official fix for CVE-2017-12615

Check the vendor's security advisory channel for the patched Tomcat versions and workarounds.

CISA KEV entry

Common questions about CVE-2017-12615

Is CVE-2017-12615 actively exploited?

Yes. CVE-2017-12615 was added to the CISA Known Exploited Vulnerabilities (KEV) catalog on 2022-03-25, which means exploitation in the wild has been confirmed, not predicted. Its EPSS 30-day exploitation probability is 100%. CISA also reports it is known to be used in ransomware campaigns.

What is the CISA deadline and required action for CVE-2017-12615?

CISA set the federal (BOD 22-01) remediation due date at 2022-04-15, which has passed; treat any unremediated system as overdue. The verbatim required action: Apply updates per vendor instructions.

What fixes CVE-2017-12615?

Check the vendor's security advisory for the patched Tomcat versions and any workarounds. KEV listing makes this a fix-first item: patch it ahead of higher-CVSS issues nobody is exploiting.

Can I ask my own AI about CVE-2017-12615?

Yes. This page includes a free, ready-to-paste AI prompt containing CVE-2017-12615's key facts: severity, CVSS, EPSS, the KEV date, the CISA due date, and the required action. Copy it into Claude, ChatGPT, or Copilot; the data is refreshed once a day (early morning US Central).

Scope and sources

More exploited Apache CVEs: CVE-2026-34486 CVE-2026-34197 CVE-2024-38475 CVE-2025-24813 CVE-2024-45195 CVE-2024-27348 CVE-2024-38856 CVE-2024-32113
All Apache exploited CVEs on one page: Apache vulnerabilities actively exploited.
Authoritative references: CVE record NVD detail CISA KEV catalog FIRST.org EPSS

Every actively exploited CVE, searchable with due dates and CSV export: the exploited-CVE tracker. The newest additions: exploited this week.