Cross-site scripting in Siemens products - CVE-2026-63356

Vulnerability identifier: #VU155877

CSH Severity: Low

CVSS v4: 5.1 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N]

CVE-ID: CVE-2026-63356

CWE-ID: CWE-79

Exploitation vector: Remote access

Exploit availability: No public exploit available

The disclosed vulnerability allows a remote attacker to perform cross-site scripting (XSS) attacks.

The vulnerability exists due to the affected devices do not properly sanitize calculated signal names contained in imported CSV trace files before including them in error messages on the Trace page. A remote attacker can trick the victim to follow a specially crafted link and execute arbitrary HTML and script code in user's browser in context of vulnerable website.

Successful exploitation of this vulnerability may allow a remote attacker to steal potentially sensitive information, change appearance of the web page, perform phishing and drive-by-download attacks.

SIPLUS ET 200SP CPU 1510SP-1 PN RAIL
SIPLUS S7-1500 CPU 1515F-2 PN RAIL
SIPLUS S7-1500 CPU 1515F-2 PN
SIPLUS S7-1500 CPU 1513F-1 PN
SIPLUS S7-1500 CPU 1513-1 PN
SIPLUS S7-1500 CPU 1511F-1 PN
SIPLUS S7-1500 CPU 1511-1 PN TX RAIL
SIPLUS S7-1500 CPU 1511-1 PN T1 RAIL
SIPLUS S7-1500 CPU 1511-1 PN
SIPLUS ET 200SP CPU 1512SP-1 PN RAIL
SIPLUS ET 200SP CPU 1512SP-1 PN
SIPLUS ET 200SP CPU 1512SP F-1 PN RAIL
SIPLUS ET 200SP CPU 1512SP F-1 PN
SIPLUS S7-1500 CPU 1515F-2 PN T2 RAIL
SIPLUS ET 200SP CPU 1510SP-1 PN
SIPLUS ET 200SP CPU 1510SP F-1 PN RAIL
SIPLUS ET 200SP CPU 1510SP F-1 PN
SIMATIC S7-1500 ET 200pro: CPU 1516PRO-2 PN
SIMATIC S7-1500 ET 200pro: CPU 1516PRO F-2 PN
SIMATIC S7-1500 ET 200pro: CPU 1513PRO-2 PN
SIMATIC S7-1500 ET 200pro: CPU 1513PRO F-2 PN
SIMATIC S7-1500 CPU S7-1518F-4 PN/DP ODK
SIMATIC S7-1500 CPU S7-1518-4 PN/DP ODK
SIMATIC S7-1500 CPU 1518TF-4 PN/DP
SIMATIC S7-1500 CPU 1518TF-3 PN
SIMATIC S7-1500 CPU 1518T-4 PN/DP
SIMATIC S7-1500 Software Controller Linux V2
SIMATIC S7-1500 Software Controller CPU 1508S V4
SIMATIC S7-1500 Software Controller CPU 1508S F V4
SIMATIC S7-1500 Software Controller CPU 1507S V4
SIMATIC S7-1500 Software Controller CPU 1507S F V4
SIMATIC S7-1500 Software Controller Linux V3
SIMATIC S7-1500 Software Controller CPU 1508S V3
SIMATIC S7-1500 Software Controller CPU 1508S TF V3
SIMATIC S7-1500 Software Controller CPU 1508S T V3
SIMATIC S7-1500 Software Controller CPU 1508S F V3
SIMATIC S7-1500 Software Controller CPU 1507S V3
SIMATIC S7-1500 Software Controller CPU 1507S F V3
SIMATIC S7-1500 CPU 1518T-3 PN
SIMATIC S7-1500 Software Controller CPU 1508S V2
SIMATIC S7-1500 Software Controller CPU 1508S F V2
SIMATIC S7-1500 Software Controller CPU 1507S V2
SIMATIC S7-1500 Software Controller CPU 1507S F V2
SIPLUS S7-1500 CPU 1518F-4 PN/DP
SIPLUS S7-1500 CPU 1518-4 PN/DP MFP
SIPLUS S7-1500 CPU 1518-4 PN/DP
SIPLUS S7-1500 CPU 1516F-3 PN/DP RAIL
SIPLUS S7-1500 CPU 1516F-3 PN/DP
SIPLUS S7-1500 CPU 1516-3 PN/DP TX RAIL
SIPLUS S7-1500 CPU 1516-3 PN/DP RAIL
SIPLUS S7-1500 CPU 1516-3 PN/DP
SIMATIC ET 200SP CPU 1514SPT F-2 PN
SIMATIC S7-1500 CPU 1515-2 PN
SIMATIC S7-1500 CPU 1513pro-2 PN
SIMATIC S7-1500 CPU 1513pro F-2 PN
SIMATIC S7-1500 CPU 1513F-1 PN
SIMATIC S7-1500 CPU 1513-1 PN
SIMATIC S7-1500 CPU 1512C-1 PN
SIMATIC S7-1500 CPU 1511TF-1 PN
SIMATIC S7-1500 CPU 1511T-1 PN
SIMATIC S7-1500 CPU 1511F-1 PN
SIMATIC S7-1500 CPU 1511C-1 PN
SIMATIC S7-1500 CPU 1511-1 PN
SIMATIC ET 200SP CPU 1514SPT-2 PN
SIMATIC S7-1500 CPU 1515F-2 PN
SIMATIC ET 200SP CPU 1514SP-2 PN
SIMATIC ET 200SP CPU 1514SP F-2 PN
SIMATIC ET 200SP CPU 1512SP-1 PN
SIMATIC ET 200SP CPU 1512SP F-1 PN
SIMATIC ET 200SP CPU 1510SP-1 PN
SIMATIC ET 200SP CPU 1510SP F-1 PN
SIMATIC ET 200SP Open Controller CPU 1515SP PC3 V4 CPUs
SIMATIC ET 200SP Open Controller CPU 1515SP PC2 V3 CPUs - Windows OS
SIMATIC ET 200SP Open Controller CPU 1515SP PC2 V3 CPUs - Industrial OS
SIMATIC ET 200SP Open Controller CPU 1515SP PC2 V2 CPUs - Windows OS
SIMATIC Drive Controller CPU 1507D TF
SIMATIC S7-1500 CPU 1517-3 PN/DP
SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP
SIMATIC S7-1500 CPU 1518F-4 PN/DP
SIMATIC S7-1500 CPU 1518F-3 PN
SIMATIC S7-1500 CPU 1518-4 PN/DP MFP
SIMATIC S7-1500 CPU 1518-4 PN/DP
SIMATIC S7-1500 CPU 1518-3 PN
SIMATIC S7-1500 CPU 1517TF-3 PN/DP
SIMATIC S7-1500 CPU 1517TF-3 PN
SIMATIC S7-1500 CPU 1517T-3 PN/DP
SIMATIC S7-1500 CPU 1517T-3 PN
SIMATIC S7-1500 CPU 1517F-3 PN/DP
SIMATIC S7-1500 CPU 1517F-3 PN
SIMATIC Drive Controller CPU 1504D TF
SIMATIC S7-1500 CPU 1517-3 PN
SIMATIC S7-1500 CPU 1516TF-3 PN/DP
SIMATIC S7-1500 CPU 1516TF-3 PN
SIMATIC S7-1500 CPU 1516T-3 PN/DP
SIMATIC S7-1500 CPU 1516T-3 PN
SIMATIC S7-1500 CPU 1516pro-2 PN
SIMATIC S7-1500 CPU 1516pro F-2 PN
SIMATIC S7-1500 CPU 1516F-3 PN/DP
SIMATIC S7-1500 CPU 1516-3 PN/DP
SIMATIC S7-1500 CPU 1515TF-2 PN
SIMATIC S7-1500 CPU 1515T-2 PN
SIMATIC S7-PLCSIM Advanced
SIMATIC ET 200SP Open Controller CPU 1515SP PC

Install updates from vendor's website.

• https://cert-portal.siemens.com/productcert/html/ssa-591731.html

• Multiple vulnerabilities in Siemens SIMATIC S7 PLCs