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Weekly Signal
Live intelligence Updated 19 Aug 2026 · 20:27 UTC

Apache, Canonical, Debian +3 more · Tomcat, Ubuntu Linux, Debian Linux +55 more

CVE-2017-12617

Apache Tomcat Remote Code Execution Vulnerability

Recommended action

Validate affected assets and exposure now, then remediate on an accelerated schedule. Oracle Security patch Cpuapr2018 3678067

View response plan
CVSS8.1
EPSS100.0%
KEVYes
ExploitationConfirmed exploitation
RemediationExplicit patch identified ↓

Assessment

Why it matters

CISA lists this vulnerability as known to be exploited; exploitation is confirmed; EPSS is 100.0%; technical severity is CVSS 8.1.

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.

Who should care

  • Teams operating Tomcat, Ubuntu Linux, Debian Linux +55 more
  • Vulnerability and exposure management teams
  • Security operations teams monitoring exploitation activity

Response plan

What I would do

  1. Confirm whether Tomcat, Ubuntu Linux, Debian Linux +55 more is present in the environment.
  2. Identify affected versions and establish whether vulnerable services are exposed or reachable.
  3. Oracle Security patch Cpuapr2018 3678067
  4. Review relevant security telemetry for evidence of attempted or successful exploitation.
  5. Document the remediation decision and track it to verified completion.

Treatment intelligence

Remediation intelligence

Not yet verified

Vendor sources are listed before government and third-party guidance. Confirm product applicability and change prerequisites before deployment.

Verification noteAutomated link verification has not completed for this guidance yet.

Patch

Required Action

Technical details

CVSS vector
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
CWE
CWE-434
Affected versions
Apache Tomcat (Start Including 7.0.0, End Excluding 7.0.82 | Start Including 8.0, End Excluding 8.0.47 | Start Including 8.5.0, End Excluding 8.5.23 | Start Including 9.0.0, End Excluding 9.0.1); Canonical Ubuntu Linux (Version 12.04 | Version 16.04 | Version 17.10 | Version 18.04); Debian Debian Linux (Version 7.0); Netapp Active Iq Unified Manager (Start Including 7.3 | Start Including 9.5); Netapp Element (Version -); Netapp Oncommand Balance (Version -); Netapp Oncommand Insight (Version -); Netapp Oncommand Shift (Version -)
Fixed versions
Apache Tomcat (Fixed from 7.0.82, 8.0.47, 8.5.23, 9.0.1)
Published
3 October 2017
Attack vector
Network
Privileges required
None
User interaction
None

Signal timeline

  1. CVE published
  2. Added to CISA KEV
  3. Latest EPSS score: 100.0%
  4. Signal calculated at 83

External references

Live public intelligence This assessment combines public-source evidence. Validate the affected product, version and exposure against your own environment before making a risk decision.