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CVE-2023-44320 Siemens CVE debrief

CVE-2023-44320 affects multiple Siemens SCALANCE WAB/WAM/WUB/WUM wireless device variants. According to the advisory, the web interface does not properly validate authentication for certain modification actions, which can let an authenticated attacker influence the user interface configured by an administrator. Siemens and CISA rate the issue as medium severity (CVSS 4.3), and the supplied vector indicates a network-reachable issue with low privileges required and integrity impact only. Siemens recommends updating affected devices to V3.0.0 or later.

Vendor
Siemens
Product
SCALANCE WAB762-1 (6GK5762-1AJ00-6AA0)
CVSS
MEDIUM 4.3
CISA KEV
Not listed in stored evidence
Original CVE published
2025-02-11
Original CVE updated
2025-05-06
Advisory published
2025-02-11
Advisory updated
2025-05-06

Who should care

OT and industrial network teams using Siemens SCALANCE wireless devices, especially administrators who manage the affected devices through the web interface and security teams responsible for plant network segmentation and account controls.

Technical summary

The advisory describes an authentication-validation weakness in the web management interface of 19 Siemens SCALANCE product variants. An authenticated attacker can perform certain modifications that influence administrator-configured UI elements. The supplied CVSS vector is CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N, which aligns with a network-accessible management-plane integrity issue rather than a confidentiality or availability problem. The vendor remediation is to upgrade to V3.0.0 or later.

Defensive priority

Medium priority. Treat as a prompt maintenance item for exposed management interfaces, especially where operator-facing UI or device configuration could be altered by a user account with limited privileges.

Recommended defensive actions

  • Update all affected Siemens SCALANCE devices to V3.0.0 or later.
  • Restrict access to the device web interface to trusted administrative networks and accounts.
  • Review recent UI and configuration changes for unauthorized or unexpected modifications.
  • Apply ICS defense-in-depth guidance, including segmentation and least-privilege access to management interfaces.
  • Monitor administrative authentication events and configuration-change logs for suspicious activity.

Evidence notes

Primary evidence comes from the CISA CSAF advisory ICSA-25-044-09 and Siemens advisory SSA-769027, both published on 2025-02-11 and revised on 2025-05-06 for typo fixes only. The source corpus lists 19 affected Siemens product variants and a single vendor remediation: update to V3.0.0 or later. The supplied CVSS vector is CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N.

Sources and references

Verified primary and authoritative sources

  • CVE-2023-44320 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2023-44320

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

  • CVE-2023-44320 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2023-44320

    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/2025/icsa-25-044-09.json

    cisa_csaf

  • Source reference

    Unverified legacy reference

    URL: https://cert-portal.siemens.com/productcert/csaf/ssa-769027.json

    Reference

  • Source reference

    Unverified legacy reference

    URL: https://cert-portal.siemens.com/productcert/html/ssa-769027.html

    Reference

  • Source reference

    Unverified legacy reference

    URL: https://www.cisa.gov/news-events/ics-advisories/icsa-25-044-09

    Reference

  • Source reference

    Unverified legacy reference

    URL: https://www.cisa.gov/uscert/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://us-cert.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.