CVE-2026-40175 Siemens CVE debrief

Who should care

Operators and administrators responsible for Siemens gWAP deployments covered by ICSA-26-134-01, security teams reviewing the associated Axios dependency-chain description, and vulnerability management teams that need to reconcile the advisory’s product metadata with the embedded vulnerability text.

Technical summary

The source corpus states that prior to Axios 1.15.0 and 0.3.1, a specific "Gadget" attack chain can turn prototype pollution in a third-party dependency into remote code execution or full cloud compromise via AWS IMDSv2 bypass. The corpus also says an attacker would need privileged access to the application to exploit it. The embedded CVSS vector is CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:C/C:H/I:H/A:H, matching a targeted, high-complexity, high-impact scenario. Separately, the Siemens advisory remediation in the corpus says to update gWAP to V3.1.1 or later, so the record should be validated against the actual deployed product and version.

Defensive priority

High for affected deployments; prioritize verification and patching where Siemens gWAP versions below 3.1.1 are present or where the described Axios dependency chain exists, because the advisory associates the issue with RCE and possible cloud compromise.

Recommended defensive actions

• Confirm whether the asset is actually Siemens gWAP and whether the deployed version is earlier than 3.1.1.
• Apply the vendor remediation in the corpus: update to V3.1.1 or later where applicable.
• If the Axios description applies to your software stack, verify dependency versions and remove or upgrade affected Axios releases noted in the source corpus.
• Audit privileged application access paths, since the corpus says exploitation requires privileged access.
• Review third-party dependencies for prototype-pollution exposure and constrain privilege where possible.
• Monitor for unexpected cloud metadata access patterns and suspicious use of AWS IMDS-related requests in environments that use the affected chain.
• Track the advisory IDs ICSA-26-134-01 and CVE-2026-40175 in vulnerability management until the product mapping is confirmed.

Evidence notes

The source item is CISA CSAF advisory ICSA-26-134-01, published 2026-05-12 and republished 2026-05-14 as a CISA republication of Siemens ProductCERT advisory SSA-876049. The corpus includes both the Axios-focused vulnerability description and Siemens gWAP remediation text, so the product mapping is internally inconsistent. The supplied metadata also marks the vendor confidence as low and needsReview as true, which supports treating this record as requiring validation before broad operational use.

Sources and references

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.