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CVE-2026-25573 Siemens CVE debrief

CVE-2026-25573 affects Siemens SICAM SIAPP SDK versions prior to V2.1.7. According to the CISA-republished Siemens advisory, the application builds shell commands from caller-provided strings and then executes them, which can let an attacker influence the command being run. Siemens and CISA describe the result as a command injection issue with potential for full system compromise. The advisory was published on 2026-03-10 and republished by CISA on 2026-03-17.

Vendor
Siemens
Product
SICAM SIAPP SDK
CVSS
HIGH 7.4
CISA KEV
Not listed in stored evidence
Original CVE published
2026-03-10
Original CVE updated
2026-03-17
Advisory published
2026-03-10
Advisory updated
2026-03-17

Who should care

Organizations using Siemens SICAM SIAPP SDK, especially product teams embedding the SDK, industrial/OT operators, and security teams responsible for patching or validating Siemens-based applications and appliances.

Technical summary

The advisory identifies unsafe shell-command construction in Siemens SICAM SIAPP SDK. A caller-controlled string can influence the executed command, making command injection possible. The supplied CVSS vector is CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H, which CISA lists as HIGH severity. Siemens' remediation is to update to V2.1.7 or later. No KEV listing was provided in the source corpus.

Defensive priority

High

Recommended defensive actions

  • Update Siemens SICAM SIAPP SDK to V2.1.7 or later.
  • Inventory products and integrations that include or depend on the affected SDK.
  • Review any code paths that pass caller-controlled data into shell or command execution routines.
  • Apply least-privilege and defense-in-depth controls to limit blast radius if command execution is abused.
  • Use CISA ICS recommended practices and vendor guidance to harden affected deployments.

Evidence notes

Primary evidence comes from CISA's CSAF advisory ICSA-26-076-04, which republishes Siemens ProductCERT advisory SSA-903736. The source text states that the affected application builds shell commands with caller-provided strings and executes them, enabling command injection and possible full system compromise. The affected product/version is Siemens SICAM SIAPP SDK versions prior to 2.1.7, and the remediation is to update to V2.1.7 or later. The provided CVSS vector is CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H. No Known Exploited Vulnerabilities entry was included in the corpus.

Sources and references

Verified primary and authoritative sources

  • CVE-2026-25573 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2026-25573

    CVE Program - Official CVE Program record with source-provided CVE metadata.

  • CVE-2026-25573 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2026-25573

    NIST National Vulnerability Database - Official NIST NVD detail page and source-specific vulnerability assessment.

Supplemental references

  • Source item URL

    Unverified legacy reference

    URL: https://raw.githubusercontent.com/cisagov/CSAF/develop/csaf_files/OT/white/2026/icsa-26-076-04.json

    cisa_csaf

  • Source reference

    Unverified legacy reference

    URL: https://cert-portal.siemens.com/productcert/csaf/ssa-903736.json

    Reference

  • Source reference

    Unverified legacy reference

    URL: https://cert-portal.siemens.com/productcert/html/ssa-903736.html

    Reference

  • Source reference

    Unverified legacy reference

    URL: https://www.cisa.gov/news-events/ics-advisories/icsa-26-076-04

    Reference

  • Source reference

    Unverified legacy reference

    URL: https://www.cisa.gov/news-events/ics-alerts/ics-alert-10-301-01

    Reference

  • Source reference

    Unverified legacy reference

    URL: https://www.cisa.gov/resources-tools/resources/ics-recommended-practices

    Reference

  • Source reference

    Unverified legacy reference

    URL: https://www.cisa.gov/topics/industrial-control-systems

    Reference

  • Source reference

    Unverified legacy reference

    URL: https://www.cisa.gov/sites/default/files/recommended_practices/NCCIC_ICS-CERT_Defense_in_Depth_2016_S508C.pdf

    Reference

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.