No patch or specific mitigation is required for this retracted vulnerability. Siemens recommends protecting network access to devices with appropriate mechanisms and following the company's operational guidelines for industrial security, available at https://www.siemens.com/cert/operational-guidelines-industrial-security and https://www.siemens.com/industrialsecurity.
Quick answers
What is CVE-2026-7891?
No patch or specific mitigation is required for this retracted vulnerability. Siemens recommends protecting network access to devices with appropriate mechanisms and following the company's operational guidelines for industrial security, available at https://www.siemens.com/cert/operational-guidelines-industrial-security and https://www.siemens.com/industrialsecurity.
How severe is CVE-2026-7891?
info
Is CVE-2026-7891 known to be exploited?
It is not marked known-exploited in this record.
How should CVE-2026-7891 be mitigated?
No patch or specific mitigation is required for this retracted vulnerability. Siemens recommends protecting network access to devices with appropriate mechanisms and following the company's operational guidelines for industrial security, available at https://www.siemens.com/cert/operational-guidelines-industrial-security and https://www.siemens.com/industrialsecurity.
CVSS
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Vendor
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Published
Sep 30, 2026 · 08:05
Patch
Unknown / not confirmed
Affected products
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Mitigation
No patch or specific mitigation is required for this retracted vulnerability. Siemens recommends protecting network access to devices with appropriate mechanisms and following the company's operational guidelines for industrial security, available at https://www.siemens.com/cert/operational-guidelines-industrial-security and https://www.siemens.com/industrialsecurity.
CISA and Siemens ProductCERT issued and subsequently revoked an advisory for CVE-2026-7891 affecting Siemens Mendix Runtime. Re-investigation confirmed the reported insecure inherited permissions behavior is expected platform configuration and does not expose protected application-specific attributes. The vulnerability has been officially retracted, with product status marked as not_affected.