Critical SSA-591731 8 CVEs

SSA-591731: Multiple Vulnerabilities in SIMATIC S7 PLCs Web Server

Published Oct 13, 2026 · Updated Oct 13, 2026

Vendor: Siemens Product: SIMATIC Drive Controller CPU 1504D TF (6ES7615-4DF10-0AB0) Product: SIMATIC Drive Controller CPU 1507D TF (6ES7615-7DF10-0AB0) Product: SIMATIC ET 200SP CPU 1510SP F-1 PN (6ES7510-1SJ01-0AB0) Product: SIMATIC ET 200SP CPU 1510SP F-1 PN (6ES7510-1SK03-0AB0) Product: SIMATIC ET 200SP CPU 1510SP-1 PN (6ES7510-1DJ01-0AB0) Product: SIMATIC ET 200SP CPU 1510SP-1 PN (6ES7510-1DK03-0AB0) Product: SIMATIC ET 200SP CPU 1512SP F-1 PN (6ES7512-1SK01-0AB0) Product: SIMATIC ET 200SP CPU 1512SP F-1 PN (6ES7512-1SM03-0AB0) Product: SIMATIC ET 200SP CPU 1512SP-1 PN (6ES7512-1DK01-0AB0) Product: SIMATIC ET 200SP CPU 1512SP-1 PN (6ES7512-1DM03-0AB0) Product: SIMATIC ET 200SP CPU 1514SP F-2 PN (6ES7514-2SN03-0AB0) Product: SIMATIC ET 200SP CPU 1514SP-2 PN (6ES7514-2DN03-0AB0) Product: SIMATIC ET 200SP CPU 1514SPT F-2 PN (6ES7514-2WN03-0AB0) Product: SIMATIC ET 200SP CPU 1514SPT-2 PN (6ES7514-2VN03-0AB0) Product: SIMATIC ET 200SP Open Controller CPU 1515SP PC (incl. SIPLUS variants) Product: SIMATIC ET 200SP Open Controller CPU 1515SP PC2 (incl. SIPLUS variants) V2 CPUs Product: SIMATIC ET 200SP Open Controller CPU 1515SP PC3 V4 CPUs Product: SIMATIC S7-1500 CPU 1511-1 PN (6ES7511-1AK00-0AB0) Product: SIMATIC S7-1500 CPU 1511-1 PN (6ES7511-1AK01-0AB0) Product: SIMATIC S7-1500 CPU 1511-1 PN (6ES7511-1AK02-0AB0) Product: SIMATIC S7-1500 CPU 1511-1 PN (6ES7511-1AL03-0AB0) Product: SIMATIC S7-1500 CPU 1511C-1 PN (6ES7511-1CK00-0AB0) Product: SIMATIC S7-1500 CPU 1511C-1 PN (6ES7511-1CK01-0AB0) Product: SIMATIC S7-1500 CPU 1511C-1 PN (6ES7511-1CL03-0AB0) Product: SIMATIC S7-1500 CPU 1511F-1 PN (6ES7511-1FK01-0AB0) Product: SIMATIC S7-1500 CPU 1511F-1 PN (6ES7511-1FK02-0AB0) Product: SIMATIC S7-1500 CPU 1511F-1 PN (6ES7511-1FL03-0AB0) Product: SIMATIC S7-1500 CPU 1511T-1 PN (6ES7511-1TK01-0AB0) Product: SIMATIC S7-1500 CPU 1511T-1 PN (6ES7511-1TL03-0AB0) +119 more

Summary

SIMATIC S7-1500 devices contain multiple vulnerabilities in the web server that could allow an attacker to execute malicious code in an authorized user’s browser session and perform PLC operations within the scope of that user’s authorization.

Siemens is preparing fixes and recommends specific mitigations for products where fixes are not or not yet available.

Vulnerabilities 8

Critical 9.6

CVE-2026-63350

Affected devices do not properly restrict executable content contained in imported trace files. This could allow an att…

Siemens SIMATIC S7-1500 CPU 1515F-2 PN SIMATIC Drive Controller CPU 1507D TF SIMATIC S7-1500 CPU 1511TF-1 PN Windows ICS / OT

Oct 13, 2026
Critical 9.6

CVE-2026-63353

Affected devices do not properly sanitize comment fields contained in imported trace files before rendering them on the…

Siemens SIMATIC S7-1500 CPU 1511C-1 PN SIMATIC S7-1500 CPU 1515-2 PN SIMATIC Drive Controller CPU 1504D TF Windows ICS / OT

Oct 13, 2026
Critical 9.6

CVE-2026-63354

Affected devices do not properly validate and sanitize visual marker data contained in imported CSV trace files before …

Siemens SIMATIC S7-1500 CPU 1516-3 PN/DP SIMATIC S7-1500 CPU 1513F-1 PN SIMATIC S7-1500 CPU 1511-1 PN Windows ICS / OT

Oct 13, 2026
Medium 6.1

CVE-2026-63351

Affected devices do not properly validate and sanitize visual properties of calculated signals contained in imported CS…

Siemens SIMATIC S7-1500 CPU 1512C-1 PN SIMATIC S7-1500 CPU 1516-3 PN/DP SIMATIC S7-1500 CPU 1513F-1 PN Windows ICS / OT

Oct 13, 2026
Medium 6.1

CVE-2026-63352

Affected devices do not properly sanitize calculated signal data contained in imported CSV trace files before rendering…

Siemens SIMATIC S7-1500 CPU 1511F-1 PN SIMATIC S7-1500 CPU 1515F-2 PN SIMATIC Drive Controller CPU 1507D TF Windows ICS / OT

Oct 13, 2026
Medium 6.1

CVE-2026-63355

Affected devices do not properly sanitize signal names contained in imported CSV trace files before rendering them in s…

Siemens SIMATIC S7-1500 CPU 1515T-2 PN SIMATIC S7-1500 CPU 1512C-1 PN SIMATIC S7-1500 CPU 1516-3 PN/DP Windows ICS / OT

Oct 13, 2026
Medium 6.1

CVE-2026-63356

Affected devices do not properly sanitize calculated signal names contained in imported CSV trace files before includin…

Siemens SIMATIC S7-1500 CPU 1511F-1 PN SIMATIC S7-1500 CPU 1515F-2 PN SIMATIC S7-1500 CPU 1511TF-1 PN Windows ICS / OT

Oct 13, 2026
Medium 6.1

CVE-2026-63357

Affected devices do not properly sanitize calculated signal data contained in imported calculated signal files before r…

Siemens SIMATIC S7-1500 CPU 1516F-3 PN/DP SIMATIC S7-1500 CPU 1511C-1 PN SIMATIC S7-1500 CPU 1515-2 PN Windows ICS / OT

Oct 13, 2026

Revision history

2026-10-13 #1
Publication Date

References

SSA-591731: Multiple Vulnerabilities in SIMATIC S7 PLCs Web Server - HTML Version
https://cert-portal.siemens.com/productcert/html/ssa-591731.html