Remote XSS via Firmware Update Filename Validation on Siemens Device
CVE-2026-25789 Published on May 12, 2026

Affected devices do not properly validate and sanitize filenames on the Firmware Update page. This could allow a remote attacker to social engineer the user into selecting the modified firmware file to be uploaded. This would result in malitcious JavaScript execution in the context of the authenticated user's session without requiring the file to be uploaded, potentially leading to session hijacking or credential theft.

NVD

Weakness Type

What is a XSS Vulnerability?

The software does not neutralize or incorrectly neutralizes user-controllable input before it is placed in output that is used as a web page that is served to other users.

CVE-2026-25789 has been classified to as a XSS vulnerability or weakness.

Products Associated with CVE-2026-25789

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Siemens Simatic S7 1500 Software Controller

Siemens Simatic S7 Plcsim Advanced

Affected Versions

Siemens SIMATIC Drive Controller CPU 1504D TF:

Before V3.1.6 is affected.

Siemens SIMATIC Drive Controller CPU 1507D TF:

Before V3.1.6 is affected.

Siemens SIMATIC ET 200SP CPU 1510SP F-1 PN:

Before * is affected.

Siemens SIMATIC ET 200SP CPU 1510SP F-1 PN:

Before V2.9.9 is affected.

Siemens SIMATIC ET 200SP CPU 1510SP F-1 PN:

Before * is affected.

Siemens SIMATIC ET 200SP CPU 1510SP-1 PN:

Before * is affected.

Siemens SIMATIC ET 200SP CPU 1510SP-1 PN:

Before V2.9.9 is affected.

Siemens SIMATIC ET 200SP CPU 1510SP-1 PN:

Before * is affected.

Siemens SIMATIC ET 200SP CPU 1512SP F-1 PN:

Before * is affected.

Siemens SIMATIC ET 200SP CPU 1512SP F-1 PN:

Before V2.9.9 is affected.

Siemens SIMATIC ET 200SP CPU 1512SP F-1 PN:

Before * is affected.

Siemens SIMATIC ET 200SP CPU 1512SP-1 PN:

Before * is affected.

Siemens SIMATIC ET 200SP CPU 1512SP-1 PN:

Before V2.9.9 is affected.

Siemens SIMATIC ET 200SP CPU 1512SP-1 PN:

Before * is affected.

Siemens SIMATIC ET 200SP CPU 1514SP F-2 PN:

Before * is affected.

Siemens SIMATIC ET 200SP CPU 1514SP-2 PN:

Before * is affected.

Siemens SIMATIC ET 200SP CPU 1514SPT F-2 PN:

Before * is affected.

Siemens SIMATIC ET 200SP CPU 1514SPT-2 PN:

Before * is affected.

Siemens SIMATIC ET 200SP Open Controller CPU 1515SP PC (incl. SIPLUS variants):

Before * is affected.

Siemens SIMATIC ET 200SP Open Controller CPU 1515SP PC2 (incl. SIPLUS variants) V2 CPUs:

Before * is affected.

Siemens SIMATIC ET 200SP Open Controller CPU 1515SP PC2 (incl. SIPLUS variants) V3 CPUs:

Before * is affected.

Siemens SIMATIC ET 200SP Open Controller CPU 1515SP PC3 V4 CPUs:

Before * is affected.

Siemens SIMATIC S7-1500 CPU 1511-1 PN:

Before * is affected.

Siemens SIMATIC S7-1500 CPU 1511-1 PN:

Before V2.9.9 is affected.

Siemens SIMATIC S7-1500 CPU 1511-1 PN:

Before V2.9.9 is affected.

Siemens SIMATIC S7-1500 CPU 1511-1 PN:

Before * is affected.

Siemens SIMATIC S7-1500 CPU 1511C-1 PN:

Before V2.9.9 is affected.

Siemens SIMATIC S7-1500 CPU 1511C-1 PN:

Before V2.9.9 is affected.

Siemens SIMATIC S7-1500 CPU 1511C-1 PN:

Before * is affected.

Siemens SIMATIC S7-1500 CPU 1511F-1 PN:

Before * is affected.

Siemens SIMATIC S7-1500 CPU 1511F-1 PN:

Before V2.9.9 is affected.

Siemens SIMATIC S7-1500 CPU 1511F-1 PN:

Before V2.9.9 is affected.

Siemens SIMATIC S7-1500 CPU 1511F-1 PN:

Before * is affected.

Siemens SIMATIC S7-1500 CPU 1511T-1 PN:

Before V2.9.9 is affected.

Siemens SIMATIC S7-1500 CPU 1511T-1 PN:

Before * is affected.

Siemens SIMATIC S7-1500 CPU 1511TF-1 PN:

Before V2.9.9 is affected.

Siemens SIMATIC S7-1500 CPU 1511TF-1 PN:

Before * is affected.

Siemens SIMATIC S7-1500 CPU 1512C-1 PN:

Before V2.9.9 is affected.

Siemens SIMATIC S7-1500 CPU 1512C-1 PN:

Before V2.9.9 is affected.

Siemens SIMATIC S7-1500 CPU 1512C-1 PN:

Before * is affected.

Siemens SIMATIC S7-1500 CPU 1513-1 PN:

Before * is affected.

Siemens SIMATIC S7-1500 CPU 1513-1 PN:

Before V2.9.9 is affected.

Siemens SIMATIC S7-1500 CPU 1513-1 PN:

Before V2.9.9 is affected.

Siemens SIMATIC S7-1500 CPU 1513-1 PN:

Before * is affected.

Siemens SIMATIC S7-1500 CPU 1513F-1 PN:

Before * is affected.

Siemens SIMATIC S7-1500 CPU 1513F-1 PN:

Before V2.9.9 is affected.

Siemens SIMATIC S7-1500 CPU 1513F-1 PN:

Before V2.9.9 is affected.

Siemens SIMATIC S7-1500 CPU 1513F-1 PN:

Before * is affected.

Siemens SIMATIC S7-1500 CPU 1513pro F-2 PN:

Before * is affected.

Siemens SIMATIC S7-1500 CPU 1513pro-2 PN:

Before * is affected.

Siemens SIMATIC S7-1500 CPU 1515-2 PN:

Before * is affected.

Siemens SIMATIC S7-1500 CPU 1515-2 PN:

Before V2.9.9 is affected.

Siemens SIMATIC S7-1500 CPU 1515-2 PN:

Before V2.9.9 is affected.

Siemens SIMATIC S7-1500 CPU 1515-2 PN:

Before * is affected.

Siemens SIMATIC S7-1500 CPU 1515F-2 PN:

Before * is affected.

Siemens SIMATIC S7-1500 CPU 1515F-2 PN:

Before V2.9.9 is affected.

Siemens SIMATIC S7-1500 CPU 1515F-2 PN:

Before V2.9.9 is affected.

Siemens SIMATIC S7-1500 CPU 1515F-2 PN:

Before * is affected.

Siemens SIMATIC S7-1500 CPU 1515T-2 PN:

Before V2.9.9 is affected.

Siemens SIMATIC S7-1500 CPU 1515T-2 PN:

Before * is affected.

Siemens SIMATIC S7-1500 CPU 1515TF-2 PN:

Before V2.9.9 is affected.

Siemens SIMATIC S7-1500 CPU 1515TF-2 PN:

Before * is affected.

Siemens SIMATIC S7-1500 CPU 1516-3 PN/DP:

Before * is affected.

Siemens SIMATIC S7-1500 CPU 1516-3 PN/DP:

Before V2.9.9 is affected.

Siemens SIMATIC S7-1500 CPU 1516-3 PN/DP:

Before V2.9.9 is affected.

Siemens SIMATIC S7-1500 CPU 1516-3 PN/DP:

Before * is affected.

Siemens SIMATIC S7-1500 CPU 1516F-3 PN/DP:

Before * is affected.

Siemens SIMATIC S7-1500 CPU 1516F-3 PN/DP:

Before V2.9.9 is affected.

Siemens SIMATIC S7-1500 CPU 1516F-3 PN/DP:

Before V2.9.9 is affected.

Siemens SIMATIC S7-1500 CPU 1516F-3 PN/DP:

Before * is affected.

Siemens SIMATIC S7-1500 CPU 1516pro F-2 PN:

Before * is affected.

Siemens SIMATIC S7-1500 CPU 1516pro-2 PN:

Before * is affected.

Siemens SIMATIC S7-1500 CPU 1516T-3 PN:

Before * is affected.

Siemens SIMATIC S7-1500 CPU 1516T-3 PN/DP:

Before V3.1.6 is affected.

Siemens SIMATIC S7-1500 CPU 1516TF-3 PN:

Before * is affected.

Siemens SIMATIC S7-1500 CPU 1516TF-3 PN/DP:

Before V3.1.6 is affected.

Siemens SIMATIC S7-1500 CPU 1517-3 PN:

Before * is affected.

Siemens SIMATIC S7-1500 CPU 1517-3 PN/DP:

Before V3.1.6 is affected.

Siemens SIMATIC S7-1500 CPU 1517F-3 PN:

Before * is affected.

Siemens SIMATIC S7-1500 CPU 1517F-3 PN/DP:

Before V3.1.6 is affected.

Siemens SIMATIC S7-1500 CPU 1517F-3 PN/DP:

Before V3.1.6 is affected.

Siemens SIMATIC S7-1500 CPU 1517T-3 PN:

Before * is affected.

Siemens SIMATIC S7-1500 CPU 1517T-3 PN/DP:

Before V3.1.6 is affected.

Siemens SIMATIC S7-1500 CPU 1517TF-3 PN:

Before * is affected.

Siemens SIMATIC S7-1500 CPU 1517TF-3 PN/DP:

Before V3.1.6 is affected.

Siemens SIMATIC S7-1500 CPU 1518-3 PN:

Before * is affected.

Siemens SIMATIC S7-1500 CPU 1518-4 PN/DP:

Before V3.1.6 is affected.

Siemens SIMATIC S7-1500 CPU 1518-4 PN/DP MFP:

Before V3.1.6 is affected.

Siemens SIMATIC S7-1500 CPU 1518-4 PN/DP MFP:

Before V3.1.6 is affected.

Siemens SIMATIC S7-1500 CPU 1518F-3 PN:

Before * is affected.

Siemens SIMATIC S7-1500 CPU 1518F-4 PN/DP:

Before V3.1.6 is affected.

Siemens SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP:

Before V3.1.6 is affected.

Siemens SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP:

Before V3.1.6 is affected.

Siemens SIMATIC S7-1500 CPU 1518T-3 PN:

Before * is affected.

Siemens SIMATIC S7-1500 CPU 1518T-4 PN/DP:

Before V3.1.6 is affected.

Siemens SIMATIC S7-1500 CPU 1518TF-3 PN:

Before * is affected.

Siemens SIMATIC S7-1500 CPU 1518TF-4 PN/DP:

Before V3.1.6 is affected.

Siemens SIMATIC S7-1500 CPU S7-1518-4 PN/DP ODK:

Before * is affected.

Siemens SIMATIC S7-1500 CPU S7-1518F-4 PN/DP ODK:

Before * is affected.

Siemens SIMATIC S7-1500 ET 200pro: CPU 1513PRO F-2 PN:

Before V2.9.9 is affected.

Siemens SIMATIC S7-1500 ET 200pro: CPU 1513PRO-2 PN:

Before V2.9.9 is affected.

Siemens SIMATIC S7-1500 ET 200pro: CPU 1516PRO F-2 PN:

Before V2.9.9 is affected.

Siemens SIMATIC S7-1500 ET 200pro: CPU 1516PRO-2 PN:

Before V2.9.9 is affected.

Siemens SIMATIC S7-1500 Software Controller CPU 1507S F V2:

Before * is affected.

Siemens SIMATIC S7-1500 Software Controller CPU 1507S F V3:

Before * is affected.

Siemens SIMATIC S7-1500 Software Controller CPU 1507S F V4:

Before * is affected.

Siemens SIMATIC S7-1500 Software Controller CPU 1507S V2:

Before * is affected.

Siemens SIMATIC S7-1500 Software Controller CPU 1507S V3:

Before * is affected.

Siemens SIMATIC S7-1500 Software Controller CPU 1507S V4:

Before * is affected.

Siemens SIMATIC S7-1500 Software Controller CPU 1508S F V2:

Before * is affected.

Siemens SIMATIC S7-1500 Software Controller CPU 1508S F V3:

Before * is affected.

Siemens SIMATIC S7-1500 Software Controller CPU 1508S F V4:

Before * is affected.

Siemens SIMATIC S7-1500 Software Controller CPU 1508S T V3:

Before * is affected.

Siemens SIMATIC S7-1500 Software Controller CPU 1508S TF V3:

Before * is affected.

Siemens SIMATIC S7-1500 Software Controller CPU 1508S V2:

Before * is affected.

Siemens SIMATIC S7-1500 Software Controller CPU 1508S V3:

Before * is affected.

Siemens SIMATIC S7-1500 Software Controller CPU 1508S V4:

Before * is affected.

Siemens SIMATIC S7-1500 Software Controller Linux V2:

Before * is affected.

Siemens SIMATIC S7-1500 Software Controller Linux V3:

Before * is affected.

Siemens SIMATIC S7-PLCSIM Advanced:

Before * is affected.

Siemens SIPLUS ET 200SP CPU 1510SP F-1 PN:

Before V2.9.9 is affected.

Siemens SIPLUS ET 200SP CPU 1510SP F-1 PN RAIL:

Before V2.9.9 is affected.

Siemens SIPLUS ET 200SP CPU 1510SP-1 PN:

Before V2.9.9 is affected.

Siemens SIPLUS ET 200SP CPU 1510SP-1 PN:

Before V2.9.9 is affected.

Siemens SIPLUS ET 200SP CPU 1510SP-1 PN RAIL:

Before V2.9.9 is affected.

Siemens SIPLUS ET 200SP CPU 1510SP-1 PN RAIL:

Before V2.9.9 is affected.

Siemens SIPLUS ET 200SP CPU 1512SP F-1 PN:

Before * is affected.

Siemens SIPLUS ET 200SP CPU 1512SP F-1 PN:

Before V2.9.9 is affected.

Siemens SIPLUS ET 200SP CPU 1512SP F-1 PN:

Before V2.9.9 is affected.

Siemens SIPLUS ET 200SP CPU 1512SP F-1 PN RAIL:

Before V2.9.9 is affected.

Siemens SIPLUS ET 200SP CPU 1512SP F-1 PN RAIL:

Before V2.9.9 is affected.

Siemens SIPLUS ET 200SP CPU 1512SP-1 PN:

Before V2.9.9 is affected.

Siemens SIPLUS ET 200SP CPU 1512SP-1 PN:

Before V2.9.9 is affected.

Siemens SIPLUS ET 200SP CPU 1512SP-1 PN RAIL:

Before V2.9.9 is affected.

Siemens SIPLUS ET 200SP CPU 1512SP-1 PN RAIL:

Before V2.9.9 is affected.

Siemens SIPLUS S7-1500 CPU 1511-1 PN:

Before * is affected.

Siemens SIPLUS S7-1500 CPU 1511-1 PN:

Before V2.9.9 is affected.

Siemens SIPLUS S7-1500 CPU 1511-1 PN:

Before V2.9.9 is affected.

Siemens SIPLUS S7-1500 CPU 1511-1 PN:

Before V2.9.9 is affected.

Siemens SIPLUS S7-1500 CPU 1511-1 PN:

Before V2.9.9 is affected.

Siemens SIPLUS S7-1500 CPU 1511-1 PN T1 RAIL:

Before V2.9.9 is affected.

Siemens SIPLUS S7-1500 CPU 1511-1 PN T1 RAIL:

Before V2.9.9 is affected.

Siemens SIPLUS S7-1500 CPU 1511-1 PN TX RAIL:

Before V2.9.9 is affected.

Siemens SIPLUS S7-1500 CPU 1511-1 PN TX RAIL:

Before V2.9.9 is affected.

Siemens SIPLUS S7-1500 CPU 1511F-1 PN:

Before * is affected.

Siemens SIPLUS S7-1500 CPU 1511F-1 PN:

Before V2.9.9 is affected.

Siemens SIPLUS S7-1500 CPU 1511F-1 PN:

Before V2.9.9 is affected.

Siemens SIPLUS S7-1500 CPU 1513-1 PN:

Before * is affected.

Siemens SIPLUS S7-1500 CPU 1513-1 PN:

Before V2.9.9 is affected.

Siemens SIPLUS S7-1500 CPU 1513-1 PN:

Before V2.9.9 is affected.

Siemens SIPLUS S7-1500 CPU 1513-1 PN:

Before V2.9.9 is affected.

Siemens SIPLUS S7-1500 CPU 1513-1 PN:

Before V2.9.9 is affected.

Siemens SIPLUS S7-1500 CPU 1513F-1 PN:

Before * is affected.

Siemens SIPLUS S7-1500 CPU 1513F-1 PN:

Before V2.9.9 is affected.

Siemens SIPLUS S7-1500 CPU 1513F-1 PN:

Before V2.9.9 is affected.

Siemens SIPLUS S7-1500 CPU 1515F-2 PN:

Before V2.9.9 is affected.

Siemens SIPLUS S7-1500 CPU 1515F-2 PN:

Before V2.9.9 is affected.

Siemens SIPLUS S7-1500 CPU 1515F-2 PN RAIL:

Before V2.9.9 is affected.

Siemens SIPLUS S7-1500 CPU 1515F-2 PN T2 RAIL:

Before V2.9.9 is affected.