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PatchSiren cyber security CVE debrief

CVE-2016-8938 IBM CVE debrief

CVE-2016-8938 is a critical IBM UrbanCode Deploy vulnerability in which a specially crafted file upload could replace code on the server, enabling code execution on UCD agent machines that host customer production applications. NVD published the record on 2017-02-01 and later marked it modified on 2026-05-13; the IBM vendor advisory is referenced in the NVD record.

Vendor
IBM
Product
CVE-2016-8938
CVSS
CRITICAL 10
CISA KEV
Not listed in stored evidence
Original CVE published
2017-02-01
Original CVE updated
2026-05-13
Advisory published
2017-02-01
Advisory updated
2026-05-13

Who should care

IBM UrbanCode Deploy administrators, release engineering teams, and security teams responsible for production deployment pipelines and UCD agent hosts should treat this as urgent. Any environment running affected 6.x releases should be reviewed, especially where file upload features are exposed to users.

Technical summary

NVD classifies the issue as CVSS 3.0 10.0 (AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H) and maps it to CWE-284. The vulnerability is described as a specially crafted upload that can overwrite code on the server, with downstream execution on UCD agent machines. The NVD CPE list marks multiple IBM UrbanCode Deploy 6.x releases as vulnerable, including 6.0, 6.0.1.x, 6.1.x, and 6.2.x through 6.2.2.1.

Defensive priority

Urgent. The published severity is critical and the impact spans confidentiality, integrity, and availability with network reachability and no user interaction required in the CVSS vector.

Recommended defensive actions

  • Confirm whether IBM UrbanCode Deploy is in use and inventory all affected 6.x instances listed by NVD.
  • Apply the IBM vendor patch/advisory referenced in the NVD record as soon as possible.
  • Restrict access to upload functionality and deployment interfaces until patched, using network controls and least-privilege access.
  • Review UCD agent hosts and deployment artifacts for unexpected code changes or unauthorized uploads.
  • Monitor logs for unusual upload activity, file replacement events, and unexpected execution on agent machines.

Evidence notes

This debrief is based only on the supplied NVD record, its IBM vendor advisory reference, and the CVE metadata. The description states that a specially crafted file upload could replace server code and lead to code execution on UCD agent machines. NVD assigns CVSS 3.0 10.0 and CWE-284, and the CPE list enumerates affected IBM UrbanCode Deploy 6.x versions. No exploit steps or unverified impact claims are included.

Official resources

CVE published by NVD on 2017-02-01T22:59:00.977Z and modified on 2026-05-13T00:24:29.033Z. Use the published date for vulnerability timing context; the later modified date reflects record updates, not initial disclosure.