Improper Sanitization in Siemens PLC Products Exposes Users to Script Injection
CVE-2026-63357

5.3MEDIUM

Key Information:

Vendor

Siemens
Status
Simatic Drive Controller Cpu 1504d Tf
Simatic Drive Controller Cpu 1507d Tf
Simatic Et 200sp Cpu 1510sp F-1 Pn
Simatic Et 200sp Cpu 1510sp-1 Pn
Vendor
CVE Published:
13 October 2026

What is CVE-2026-63357?

The vulnerability arises from a failure to properly sanitize calculated signal data in imported files, which can lead to the execution of unauthorized JavaScript in an authenticated user's browser. This could potentially allow an attacker with social engineering skills to entice a user with ‘Read diagnostics’ permissions to import a malicious file. If successful, the attacker could perform operations on the PLC through the web server, putting sensitive data and system functionality at risk.

Affected Version(s)

SIMATIC Drive Controller CPU 1504D TF 0

SIMATIC Drive Controller CPU 1507D TF 0

SIMATIC ET 200SP CPU 1510SP F-1 PN 0

References

https://cert-portal.siemens.com/productcert/html/ssa-5917...

CVSS V4

Score:
5.3
Severity:
MEDIUM
Confidentiality:
Low
Integrity:
Low
Availability:
None
Attack Vector:
Network
Attack Complexity:
Low
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
Unknown

Timeline

  • Vulnerability published

  • Vulnerability Reserved

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