CVE-2026-63355Network attack vector

Browser-script execution via unsanitized CSV trace signal names

Published Oct 13, 2026 · Updated Oct 13, 2026

XSS in Siemens SIMATIC S7-1500 Trace pages allows remote attackers to execute browser JavaScript via crafted CSV trace files. Selection menus render attacker-controlled signal names from imported files without proper sanitization. Exploitation requires an authorized user with Read diagnostics rights to import the file and interact with a menu; execution occurs in that user's browser session, not directly on the controller.

CVSS severity5.3

Medium

EPSS probability0.25%

Next 30 days · Oct 19, 2026

Known exploitationUnconfirmed

Based on sourced intelligence

Hinoki checkNot available

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Summary

What happened

The record

CVE: CVE-2026-63355
Published: Oct 13, 2026
Updated: Oct 13, 2026

Vendor: Siemens
Product: SIMATIC S7-1500 CPU 1518T-4 PN/DP
Classifications: CWE-79, T1204.002

Attack vector: network
Privileges: unauthenticated

Timeline

How it unfolded

Oct 13, 2026CVE publishedPublication date reported by the CVE source.
Oct 13, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

Affected versionversion=0 <*

What conditions does exploitation require?

Attack vectornetwork

Required privilegesunauthenticated

What is affected?

Siemens · SIMATIC S7-1500 CPU 1518T-4 PN/DPversion=0 <*

Siemens · SIMATIC S7-1500 CPU 1515T-2 PNversion=0 <*

Siemens · SIMATIC S7-1500 ET 200pro: CPU 1516PRO F-2 PNversion=0 <*

Siemens · SIMATIC S7-1500 Software Controller CPU 1507S F V2version=0 <*

Siemens · SIMATIC S7-1500 Software Controller Linux V3version=0 <*

Siemens · SIMATIC S7-1500 Software Controller CPU 1508S T V3version=0 <*

Siemens · SIPLUS ET 200SP CPU 1510SP-1 PN RAILversion=0 <*

Siemens · SIMATIC S7-1500 Software Controller CPU 1507S V3version=0 <*

Siemens · SIMATIC ET 200SP CPU 1514SP F-2 PNversion=0 <*

Siemens · SIPLUS ET 200SP CPU 1510SP F-1 PN RAILversion=0 <*

Siemens · SIMATIC S7-1500 Software Controller CPU 1508S V4version=0 <*

Siemens · SIMATIC S7-1500 CPU 1517F-3 PN/DPversion=0 <*

Siemens · SIMATIC S7-1500 ET 200pro: CPU 1513PRO F-2 PNversion=0 <*

Siemens · SIMATIC S7-1500 CPU S7-1518-4 PN/DP ODKversion=0 <*

Siemens · SIMATIC S7-1500 Software Controller CPU 1508S TF V3version=0 <*

Siemens · SIMATIC S7-1500 CPU 1517TF-3 PN/DPversion=0 <*

Siemens · SIPLUS S7-1500 CPU 1516F-3 PN/DP RAILversion=0 <*

Siemens · SIMATIC S7-1500 CPU 1516TF-3 PNversion=0 <*

Siemens · SIPLUS S7-1500 CPU 1518-4 PN/DP MFPversion=0 <*

Siemens · SIMATIC ET 200SP Open Controller CPU 1515SP PC3version=0 <*

Siemens · SIMATIC S7-1500 CPU 1516-3 PN/DPversion=0 <*

Siemens · SIPLUS S7-1500 CPU 1516-3 PN/DP RAILversion=0 <*

Siemens · SIMATIC S7-1500 CPU 1518TF-4 PN/DPversion=0 <*

Siemens · SIMATIC ET 200SP Open Controller CPU 1515SP PC2 V3 Windows OSversion=0 <*

Siemens · SIMATIC S7-1500 CPU 1517TF-3 PNversion=0 <*

Siemens · SIMATIC S7-1500 CPU 1517T-3 PNversion=0 <*

Siemens · SIPLUS ET 200SP CPU 1510SP F-1 PNversion=0 <*

Siemens · SIMATIC S7-1500 CPU 1517F-3 PNversion=0 <*

Siemens · SIMATIC S7-1500 CPU 1511F-1 PNversion=0 <*

Siemens · SIPLUS S7-1500 CPU 1518F-4 PN/DPversion=0 <*

Siemens · SIMATIC S7-1500 CPU 1511TF-1 PNversion=0 <*

Siemens · SIMATIC S7-1500 Software Controller CPU 1508S F V2version=0 <*

Siemens · SIMATIC ET 200SP CPU 1514SPT-2 PNversion=0 <*

Siemens · SIMATIC S7-1500 CPU 1518TF-3 PNversion=0 <*

Siemens · SIPLUS ET 200SP CPU 1512SP F-1 PN RAILversion=0 <*

Siemens · SIMATIC S7-1500 CPU 1513-1 PNversion=0 <*

Siemens · SIMATIC Drive Controller CPU 1507D TFversion=0 <*

Siemens · SIMATIC S7-1500 CPU 1516F-3 PN/DPversion=0 <*

Siemens · SIMATIC S7-1500 ET 200pro: CPU 1513PRO-2 PNversion=0 <*

Siemens · SIMATIC S7-1500 CPU S7-1518F-4 PN/DP ODKversion=0 <*

Siemens · SIMATIC S7-1500 CPU 1511T-1 PNversion=0 <*

Siemens · SIMATIC S7-1500 Software Controller CPU 1507Sversion=0 <*

Siemens · SIMATIC S7-1500 CPU 1518-3 PNversion=0 <*

Siemens · SIMATIC S7-1500 CPU 1518F-4 PN/DP MFPversion=0 <*

Siemens · SIMATIC S7-1500 Software Controller Linux V2version=0 <*

Siemens · SIPLUS S7-1500 CPU 1511-1 PN T1 RAILversion=0 <*

Siemens · SIMATIC S7-1500 Software Controller CPU 1507S Fversion=0 <*

Siemens · SIMATIC S7-1500 CPU 1511-1 PNversion=0 <*

Siemens · SIPLUS S7-1500 CPU 1511F-1 PNversion=0 <*

Siemens · SIPLUS ET 200SP CPU 1512SP-1 PNversion=0 <*

Siemens · SIMATIC S7-PLCSIM Advancedversion=0 <*

Siemens · SIMATIC S7-1500 Software Controller CPU 1508S Fversion=0 <*

Siemens · SIPLUS S7-1500 CPU 1511-1 PN TX RAILversion=0 <*

Siemens · SIMATIC S7-1500 Software Controller CPU 1508S F V3version=0 <*

Siemens · SIPLUS S7-1500 CPU 1515F-2 PNversion=0 <*

Siemens · SIPLUS S7-1500 CPU 1518-4 PN/DPversion=0 <*

Siemens · SIMATIC ET 200SP CPU 1510SP F-1 PNversion=0 <*

Siemens · SIMATIC S7-1500 CPU 1513F-1 PNversion=0 <*

Siemens · SIMATIC S7-1500 CPU 1516T-3 PN/DPversion=0 <*

Siemens · SIMATIC ET 200SP Open Controller CPU 1515SP PC2 V3 Industrial OSversion=0 <*

Siemens · SIMATIC ET 200SP Open Controller CPU 1515SP PCversion=0 <*

Siemens · SIMATIC S7-1500 CPU 1516pro F-2 PNversion=0 <*

Siemens · SIPLUS S7-1500 CPU 1513-1 PNversion=0 <*

Siemens · SIPLUS S7-1500 CPU 1516F-3 PN/DPversion=0 <*

Siemens · SIMATIC S7-1500 CPU 1517-3 PNversion=0 <*

Siemens · SIPLUS S7-1500 CPU 1513F-1 PNversion=0 <*

Siemens · SIMATIC ET 200SP CPU 1512SP F-1 PNversion=0 <*

Siemens · SIMATIC ET 200SP Open Controller CPU 1515SP PC2 V2 Windows OSversion=0 <*

Siemens · SIPLUS S7-1500 CPU 1516-3 PN/DPversion=0 <*

Siemens · SIMATIC S7-1500 CPU 1518F-4 PN/DPversion=0 <*

Siemens · SIMATIC S7-1500 Software Controller CPU 1508S V2version=0 <*

Siemens · SIMATIC S7-1500 CPU 1512C-1 PNversion=0 <*

Siemens · SIMATIC S7-1500 CPU 1516pro-2 PNversion=0 <*

Siemens · SIPLUS S7-1500 CPU 1511-1 PNversion=0 <*

Siemens · SIMATIC S7-1500 CPU 1513pro F-2 PNversion=0 <*

Siemens · SIMATIC S7-1500 CPU 1515F-2 PNversion=0 <*

Siemens · SIMATIC S7-1500 CPU 1518-4 PN/DPversion=0 <*

Siemens · SIMATIC ET 200SP CPU 1512SP-1 PNversion=0 <*

Siemens · SIPLUS ET 200SP CPU 1512SP-1 PN RAILversion=0 <*

Siemens · SIMATIC Drive Controller CPU 1504D TFversion=0 <*

Siemens · SIPLUS S7-1500 CPU 1516-3 PN/DP TX RAILversion=0 <*

Siemens · SIMATIC S7-1500 CPU 1513pro-2 PNversion=0 <*

Siemens · SIMATIC S7-1500 Software Controller CPU 1508S V3version=0 <*

Siemens · SIPLUS ET 200SP CPU 1510SP-1 PNversion=0 <*

Siemens · SIMATIC S7-1500 CPU 1517T-3 PN/DPversion=0 <*

Siemens · SIMATIC S7-1500 CPU 1511C-1 PNversion=0 <*

Siemens · SIMATIC S7-1500 Software Controller CPU 1507S V2version=0 <*

Siemens · SIMATIC ET 200SP CPU 1514SPT F-2 PNversion=0 <*

Siemens · SIMATIC ET 200SP CPU 1514SP-2 PNversion=0 <*

Siemens · SIMATIC S7-1500 CPU 1515-2 PNversion=0 <*

Siemens · SIPLUS S7-1500 CPU 1515F-2 PN RAILversion=0 <*

Siemens · SIMATIC S7-1500 CPU 1518-4 PN/DP MFPversion=0 <*

Siemens · SIMATIC S7-1500 CPU 1516T-3 PNversion=0 <*

Siemens · SIMATIC S7-1500 CPU 1518T-3 PNversion=0 <*

Siemens · SIMATIC S7-1500 Software Controller CPU 1507S F V3version=0 <*

Siemens · SIPLUS S7-1500 CPU 1515F-2 PN T2 RAILversion=0 <*

Siemens · SIMATIC S7-1500 CPU 1515TF-2 PNversion=0 <*

Siemens · SIMATIC S7-1500 CPU 1516TF-3 PN/DPversion=0 <*

Siemens · SIMATIC S7-1500 ET 200pro: CPU 1516PRO-2 PNversion=0 <*

Siemens · SIMATIC S7-1500 CPU 1517-3 PN/DPversion=0 <*

Siemens · SIMATIC ET 200SP CPU 1510SP-1 PNversion=0 <*

Siemens · SIPLUS ET 200SP CPU 1512SP F-1 PNversion=0 <*

Siemens · SIMATIC S7-1500 CPU 1518F-3 PNversion=0 <*

Published CVSS scores

6.1Siemens CNACVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

5.3Siemens CNACVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:L/VI:L/VA:N/SC:L/SI:L/SA:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Activity data is delayed. The latest report is Sep 28, 2026.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 22, 2026Sep 28, 2026

Latest reporting daySep 28, 2026

Latest daily unique IPsUnavailable

Prior 30-day averageUnavailable

SourceShadowserver honeypots (KEV)

Vectornetwork

Privilegesunauthenticated

Known exploitationUnconfirmed

Public exploitUnconfirmed

Weakness, pattern, technique

CWE-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

T1204.002Malicious File

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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