CVE-2026-25786

Affected devices do not properly validate and sanitize PLC/station name rendered on the "communication" parameters page of the web interface. This could allow an authenticated attacker who is authorized to download a TIA project into the product, to inject malicious scripts into the page. If a benign user with appropriate rights accesses the "communication" parameters page, the malicious code would be executed in the scope of their web session.

CVSS v3 9.1 CRITICAL

9.1^/10

CVSS v3 : CRITICAL

V3 Legend

Vector :

Exploitability : 2.3 / Impact : 6.0

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required HIGH

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact HIGH

Scope CHANGED

References

Link	Resource
https://cert-portal.siemens.com/productcert/html/ssa-688146.html

Configurations

No configuration.

History

12 May 2026, 10:16

Type	Values Removed	Values Added
New CVE

Information

Published : 2026-05-12 10:16

Updated : 2026-07-14 10:16

NVD link : CVE-2026-25786

Mitre link : CVE-2026-25786

CVE.ORG link : CVE-2026-25786

JSON object : View

Products Affected

No product.

CWE

CWE-79

Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

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"defaultStatus": "unknown"}, {"vendor": "Siemens", "product": "SIPLUS S7-1500 CPU 1516-3 PN/DP RAIL", "versions": [{"status": "affected", "version": "0", "lessThan": "V2.9.9", "versionType": "custom"}], "defaultStatus": "unknown"}, {"vendor": "Siemens", "product": "SIPLUS S7-1500 CPU 1516-3 PN/DP TX RAIL", "versions": [{"status": "affected", "version": "0", "lessThan": "V2.9.9", "versionType": "custom"}], "defaultStatus": "unknown"}, {"vendor": "Siemens", "product": "SIPLUS S7-1500 CPU 1516F-3 PN/DP", "versions": [{"status": "affected", "version": "0", "lessThan": "*", "versionType": "custom"}], "defaultStatus": "unknown"}, {"vendor": "Siemens", "product": "SIPLUS S7-1500 CPU 1516F-3 PN/DP", "versions": [{"status": "affected", "version": "0", "lessThan": "V2.9.9", "versionType": "custom"}], "defaultStatus": "unknown"}, {"vendor": "Siemens", "product": "SIPLUS S7-1500 CPU 1516F-3 PN/DP", "versions": [{"status": "affected", "version": "0", "lessThan": "V2.9.9", "versionType": "custom"}], "defaultStatus": "unknown"}, {"vendor": "Siemens", "product": "SIPLUS S7-1500 CPU 1516F-3 PN/DP RAIL", "versions": [{"status": "affected", "version": "0", "lessThan": "V2.9.9", "versionType": "custom"}], "defaultStatus": "unknown"}, {"vendor": "Siemens", "product": "SIPLUS S7-1500 CPU 1516F-3 PN/DP RAIL", "versions": [{"status": "affected", "version": "0", "lessThan": "V2.9.9", "versionType": "custom"}], "defaultStatus": "unknown"}, {"vendor": "Siemens", "product": "SIPLUS S7-1500 CPU 1518-4 PN/DP", "versions": [{"status": "affected", "version": "0", "lessThan": "V3.1.6", "versionType": "custom"}], "defaultStatus": "unknown"}, {"vendor": "Siemens", "product": "SIPLUS S7-1500 CPU 1518-4 PN/DP MFP", "versions": [{"status": "affected", "version": "0", "lessThan": "V3.1.6", "versionType": "custom"}], "defaultStatus": "unknown"}, {"vendor": "Siemens", "product": "SIPLUS S7-1500 CPU 1518F-4 PN/DP", "versions": [{"status": "affected", "version": "0", "lessThan": "V3.1.6", "versionType": "custom"}], "defaultStatus": "unknown"}]}], "published": "2026-05-12T10:16:44.193", "references": [{"url": "https://cert-portal.siemens.com/productcert/html/ssa-688146.html", "source": "productcert@siemens.com"}], "vulnStatus": "Awaiting Analysis", "weaknesses": [{"type": "Secondary", "source": "productcert@siemens.com", "description": [{"lang": "en", "value": "CWE-79"}]}], "descriptions": [{"lang": "en", "value": "Affected devices do not properly validate and sanitize PLC/station name rendered on the \"communication\" parameters page of the web interface.\r\nThis could allow an authenticated attacker who is authorized to download a TIA project into the product, to inject malicious scripts into the page.\r\nIf a benign user with appropriate rights accesses the \"communication\" parameters page, the malicious code would be executed in the scope of their web session."}], "lastModified": "2026-07-14T10:16:31.513", "sourceIdentifier": "productcert@siemens.com"}