CVE-2026-25787: CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') in Siemens SIMATIC Drive Controller CPU 1504D TF
Affected devices do not properly validate and sanitize Technology Object (TO) name rendered on the "Motion Control Diagnostics" 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 "Motion Control Diagnostics" parameters page, the malicious code would be executed in the scope of their web session.
AI Analysis
Technical Summary
This vulnerability involves improper neutralization of input during web page generation (CWE-79) in Siemens SIMATIC Drive Controller CPU 1504D TF. Specifically, the Technology Object (TO) name rendered on the "Motion Control Diagnostics" page is not properly sanitized, allowing an authenticated attacker authorized to download TIA projects to inject malicious scripts. These scripts execute in the context of other users' web sessions who access the affected page, enabling potential full compromise of the affected system's web interface session.
Potential Impact
Successful exploitation allows an attacker with authenticated access and project download rights to execute arbitrary scripts in the context of other users' web sessions on the device's web interface. This can lead to complete compromise of confidentiality, integrity, and availability of the device's management interface, potentially allowing unauthorized actions or data disclosure.
Mitigation Recommendations
Patch status is not yet confirmed — no official fix or remediation guidance is currently available from Siemens. Organizations should monitor Siemens advisories for updates. Until a fix is released, restrict access to the affected web interface to trusted users only and limit permissions to those strictly necessary. Avoid using accounts with project download rights on untrusted networks or devices.
CVE-2026-25787: CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') in Siemens SIMATIC Drive Controller CPU 1504D TF
Description
Affected devices do not properly validate and sanitize Technology Object (TO) name rendered on the "Motion Control Diagnostics" 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 "Motion Control Diagnostics" parameters page, the malicious code would be executed in the scope of their web session.
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability involves improper neutralization of input during web page generation (CWE-79) in Siemens SIMATIC Drive Controller CPU 1504D TF. Specifically, the Technology Object (TO) name rendered on the "Motion Control Diagnostics" page is not properly sanitized, allowing an authenticated attacker authorized to download TIA projects to inject malicious scripts. These scripts execute in the context of other users' web sessions who access the affected page, enabling potential full compromise of the affected system's web interface session.
Potential Impact
Successful exploitation allows an attacker with authenticated access and project download rights to execute arbitrary scripts in the context of other users' web sessions on the device's web interface. This can lead to complete compromise of confidentiality, integrity, and availability of the device's management interface, potentially allowing unauthorized actions or data disclosure.
Mitigation Recommendations
Patch status is not yet confirmed — no official fix or remediation guidance is currently available from Siemens. Organizations should monitor Siemens advisories for updates. Until a fix is released, restrict access to the affected web interface to trusted users only and limit permissions to those strictly necessary. Avoid using accounts with project download rights on untrusted networks or devices.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- siemens
- Date Reserved
- 2026-02-05T19:53:27.492Z
- Cvss Version
- 3.1
- State
- PUBLISHED
- Remediation Level
- null
Threat ID: 6a02f11acbff5d8610c13ad4
Added to database: 5/12/2026, 9:21:30 AM
Last enriched: 5/12/2026, 9:37:52 AM
Last updated: 5/13/2026, 4:48:19 AM
Views: 10
Community Reviews
0 reviewsCrowdsource mitigation strategies, share intel context, and vote on the most helpful responses. Sign in to add your voice and help keep defenders ahead.
Want to contribute mitigation steps or threat intel context? Sign in or create an account to join the community discussion.
Actions
Updates to AI analysis require Pro Console access. Upgrade inside Console → Billing.
External Links
Need more coverage?
Upgrade to Pro Console for AI refresh and higher limits.
For incident response and remediation, OffSeq services can help resolve threats faster.
Latest Threats
Check if your credentials are on the dark web
Instant breach scanning across billions of leaked records. Free tier available.