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Industrial control advisorySeverity 9.6 critical
Siemens SIMATIC S7 PLCs Web Server
ICSA-26-295-14 · CISA · October 13, 2026
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.
From CISA, quoted as published. Check the source before acting.
What to do
Disable the webserver if not required on the affected systems. Restrict the access to Port 80/tcp and 443/tcp to trusted IP address only
Ensure only qualified personnel is authorized to access the web server
Only upload trusted trace files
Currently no fix is available
Vendor fix or mitigation, quoted from the advisory.
Each CVE in this advisory
| CVE | Severity | Known exploited | Exploit likelihood |
|---|---|---|---|
| CVE-2026-63350 | 9.6 critical | No | 0.3% |
| CVE-2026-63351 | 6.1 medium | No | 0.2% |
| CVE-2026-63352 | 6.1 medium | No | 0.2% |
| CVE-2026-63353 | 9.6 critical | No | 0.3% |
| CVE-2026-63354 | 9.6 critical | No | 0.3% |
| CVE-2026-63355 | 6.1 medium | No | 0.2% |
| CVE-2026-63356 | 6.1 medium | No | 0.2% |
| CVE-2026-63357 | 6.1 medium | No | 0.2% |
Severity from the advisory (CVSS), known exploitation from CISA's catalog, exploit likelihood from EPSS (next 30 days).
Affected products
| Vendor | Product |
|---|---|
| Siemens | SIMATIC Drive Controller CPU 1504D TF (6ES7615-4DF10-0AB0) |
| Siemens | SIMATIC Drive Controller CPU 1507D TF (6ES7615-7DF10-0AB0) |
| Siemens | SIMATIC ET 200SP CPU 1510SP F-1 PN (6ES7510-1SJ01-0AB0) |
| Siemens | SIMATIC ET 200SP CPU 1510SP F-1 PN (6ES7510-1SK03-0AB0) |
| Siemens | SIMATIC ET 200SP CPU 1510SP-1 PN (6ES7510-1DJ01-0AB0) |
| Siemens | SIMATIC ET 200SP CPU 1510SP-1 PN (6ES7510-1DK03-0AB0) |
| Siemens | SIMATIC ET 200SP CPU 1512SP F-1 PN (6ES7512-1SK01-0AB0) |
| Siemens | SIMATIC ET 200SP CPU 1512SP F-1 PN (6ES7512-1SM03-0AB0) |
| Siemens | SIMATIC ET 200SP CPU 1512SP-1 PN (6ES7512-1DK01-0AB0) |
| Siemens | SIMATIC ET 200SP CPU 1512SP-1 PN (6ES7512-1DM03-0AB0) |
| Siemens | SIMATIC ET 200SP CPU 1514SP F-2 PN (6ES7514-2SN03-0AB0) |
| Siemens | SIMATIC ET 200SP CPU 1514SP-2 PN (6ES7514-2DN03-0AB0) |
| Siemens | SIMATIC ET 200SP CPU 1514SPT F-2 PN (6ES7514-2WN03-0AB0) |
| Siemens | SIMATIC ET 200SP CPU 1514SPT-2 PN (6ES7514-2VN03-0AB0) |
| Siemens | SIMATIC ET 200SP Open Controller CPU 1515SP PC (incl. SIPLUS variants) |
| Siemens | SIMATIC ET 200SP Open Controller CPU 1515SP PC2 (incl. SIPLUS variants) V2 CPUs - Windows OS |
| Siemens | SIMATIC ET 200SP Open Controller CPU 1515SP PC2 (incl. SIPLUS variants) V3 CPUs - Industrial OS |
| Siemens | SIMATIC ET 200SP Open Controller CPU 1515SP PC2 (incl. SIPLUS variants) V3 CPUs - Windows OS |
| Siemens | SIMATIC ET 200SP Open Controller CPU 1515SP PC3 V4 CPUs |
| Siemens | SIMATIC S7-1500 CPU 1511-1 PN (6ES7511-1AK00-0AB0) |
| Siemens | SIMATIC S7-1500 CPU 1511-1 PN (6ES7511-1AK01-0AB0) |
| Siemens | SIMATIC S7-1500 CPU 1511-1 PN (6ES7511-1AK02-0AB0) |
| Siemens | SIMATIC S7-1500 CPU 1511-1 PN (6ES7511-1AL03-0AB0) |
| Siemens | SIMATIC S7-1500 CPU 1511C-1 PN (6ES7511-1CK00-0AB0) |
| Siemens | SIMATIC S7-1500 CPU 1511C-1 PN (6ES7511-1CK01-0AB0) |
| Siemens | SIMATIC S7-1500 CPU 1511C-1 PN (6ES7511-1CL03-0AB0) |
| Siemens | SIMATIC S7-1500 CPU 1511F-1 PN (6ES7511-1FK01-0AB0) |
| Siemens | SIMATIC S7-1500 CPU 1511F-1 PN (6ES7511-1FK02-0AB0) |
| Siemens | SIMATIC S7-1500 CPU 1511F-1 PN (6ES7511-1FL03-0AB0) |
| Siemens | SIMATIC S7-1500 CPU 1511T-1 PN (6ES7511-1TK01-0AB0) |
| Siemens | SIMATIC S7-1500 CPU 1511T-1 PN (6ES7511-1TL03-0AB0) |
| Siemens | SIMATIC S7-1500 CPU 1511TF-1 PN (6ES7511-1UK01-0AB0) |
| Siemens | SIMATIC S7-1500 CPU 1511TF-1 PN (6ES7511-1UL03-0AB0) |
| Siemens | SIMATIC S7-1500 CPU 1512C-1 PN (6ES7512-1CK00-0AB0) |
| Siemens | SIMATIC S7-1500 CPU 1512C-1 PN (6ES7512-1CK01-0AB0) |
| Siemens | SIMATIC S7-1500 CPU 1512C-1 PN (6ES7512-1CM03-0AB0) |
| Siemens | SIMATIC S7-1500 CPU 1513-1 PN (6ES7513-1AL01-0AB0) |
| Siemens | SIMATIC S7-1500 CPU 1513-1 PN (6ES7513-1AL02-0AB0) |
| Siemens | SIMATIC S7-1500 CPU 1513-1 PN (6ES7513-1AM03-0AB0) |
| Siemens | SIMATIC S7-1500 CPU 1513F-1 PN (6ES7513-1FL01-0AB0) |
117 more in the source.
Why it's on these mode pages
- Maritime: Vendor table: Siemens (industrial control makers used in every mode, all modes) (matched by rule)
- Pipeline: Vendor table: Siemens (industrial control makers used in every mode, all modes) (matched by rule)
- Freight rail: Vendor table: Siemens (industrial control makers used in every mode, all modes) (matched by rule)
- Passenger rail and transit: Vendor table: Siemens (industrial control makers used in every mode, all modes) (matched by rule)
- Highway and motor carrier: Vendor table: Siemens (industrial control makers used in every mode, all modes) (matched by rule)
- Postal and parcel: Vendor table: Siemens (industrial control makers used in every mode, all modes) (matched by rule)
Change history
- October 13, 2026: Publication Date
- October 22, 2026: Initial CISA Republication of Siemens ProductCERT SSA-591731 advisory
- November 9, 2026: First collected by Watch
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