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PatchSiren cyber security CVE debrief

CVE-2017-2685 Siemens CVE debrief

CVE-2017-2685 is a Siemens SINUMERIK issue affecting specific Integrate Operate Client versions, where an attacker in a man-in-the-middle position could read and manipulate data in TLS sessions. The CVE was publicly published on 2017-03-01 and is rated CVSS 7.4 (HIGH).

Vendor
Siemens
Product
CVE-2017-2685
CVSS
HIGH 7.4
CISA KEV
Not listed in stored evidence
Original CVE published
2017-03-01
Original CVE updated
2026-05-13
Advisory published
2017-03-01
Advisory updated
2026-05-13

Who should care

Organizations running Siemens SINUMERIK Integrate Operate Client deployments in the affected version ranges, and teams responsible for industrial engineering, OT networks, and any systems that rely on the affected TLS sessions for confidentiality or integrity.

Technical summary

The CVE description states that Siemens SINUMERIK Integrate Operate Clients between 2.0.3.00.016 (including) and 2.0.6 (excluding), and between 3.0.4.00.032 (including) and 3.0.6 (excluding), can be impacted by a TLS-session weakness that enables MITM attackers to read and manipulate traffic. NVD also lists related vulnerable CPEs for SINUMERIK Integrate Access MyMachine/Ethernet and SINUMERIK Operate 4.5 SP6 and 4.7 SP2. NVD’s CVSS v3.0 vector is AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N, indicating high confidentiality and integrity impact with no availability impact.

Defensive priority

High

Recommended defensive actions

  • Upgrade Siemens SINUMERIK Integrate Operate Client to version 2.0.6 or later for the 2.x line, or 3.0.6 or later for the 3.x line, per the affected ranges in the CVE description.
  • Review Siemens advisory SSA-934525 and the NVD entry for the full affected scope, including the additional CPEs listed by NVD.
  • Reduce exposure to man-in-the-middle risk on networks carrying affected clients by tightening segmentation and limiting untrusted network paths.
  • Validate any TLS inspection, proxy, or certificate-handling controls in the environment so they do not place affected clients into insecure session paths.
  • Prioritize inventory and patch verification for affected engineering or production environments where session confidentiality and integrity matter most.

Evidence notes

This debrief is grounded in the public CVE record, NVD detail, and the Siemens vendor advisory referenced by NVD. The supplied record identifies CVSS 7.4/HIGH, the MITM/TLS impact, and the affected version ranges. No exploit code or weaponized reproduction is included.

Official resources

Publicly disclosed in the CVE record on 2017-03-01. The supplied NVD record was last modified on 2026-05-13, but that date is not the issue date.