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Vulnerabilities

Vulnerability · CVE-2026-63357

Affected devices do not properly sanitize calculated signal data contained in imported calculated signal files before rendering it on the Trace page.

Published Oct 13, 2026 · catalog updated Oct 14, 2026 · Siemens SIMATIC Drive Controller CPU 1504D TF

Last checked Oct 25, 2026. A connected source was read within the last 7 days.

Check if you run it

No confirmed exploitation is on record for CVE-2026-63357. EPSS is 0.19%. Act only if a listed version of Siemens SIMATIC Drive Controller CPU 1504D TF is installed.

Gaps on this record

  • No version range is stored. A customer cannot check an installed version against this record.
  • No vendor fix or required action is stored. Compare the linked advisory before you change production.

Same product and reporting

Severity
Medium6.1
Known exploitation
Not in CISA/VulnCheck KEV
EPSS
0.19%
Remediation
Not established
Affected products
vendor Siemens SIMATIC Drive Controller CPU 1504D TF · vendor Siemens SIMATIC Drive Controller CPU 1507D TF · vendor Siemens SIMATIC ET 200SP CPU 1510SP F-1 PN · vendor Siemens SIMATIC ET 200SP CPU 1510SP-1 PN · vendor Siemens SIMATIC ET 200SP CPU 1512SP F-1 PN

Affected devices do not properly sanitize calculated signal data contained in imported calculated signal files before rendering it on the Trace page. This could allow an attacker to social engineer an authorized user who holds the function right “Read diagnostics” into importing a specially crafted file. Successful exploitation could allow attacker-controlled JavaScript to execute in the user’s browser session and perform PLC operations through the web server within the scope of the user’s authorization.

Are you affected?

Enter the version you run. The result uses only the ranges stored on this record.

The check returns affected, not affected, or incomplete. It does not guess a version that is missing from the record.

  • vendor Siemens SIMATIC Drive Controller CPU 1504D TFversion unspecified
  • vendor Siemens SIMATIC Drive Controller CPU 1507D TFversion unspecified
  • vendor Siemens SIMATIC ET 200SP CPU 1510SP F-1 PNversion unspecified
  • vendor Siemens SIMATIC ET 200SP CPU 1510SP-1 PNversion unspecified
  • vendor Siemens SIMATIC ET 200SP CPU 1512SP F-1 PNversion unspecified

How to fix CVE-2026-63357

What to do

Three questions, each answered from this record only. Confirm the vendor advisory before you patch.

Should you patch?

No confirmed exploitation is on record for CVE-2026-63357. EPSS is 0.19%. Act only if a listed version of Siemens SIMATIC Drive Controller CPU 1504D TF is installed.

Which versions are affected?

Affected version ranges are not on this record. Compare the installed version with the linked vendor advisory before you change production.

What should an analyst verify?

CWE-79: Cross-site Scripting (XSS). EPSS 0.19%. There is no CISA KEV listing. No Exploit-DB or Metasploit reference is linked. Use the source links for the original advisory.

Code

The project this record applies to. Exploit listings stay in References.

No public source repository is identified for this product.

Timeline

Detection, updates, and resolution for this record.

  1. Oct 14, 2026 · CVE.org

    Updated

    Affected devices do not properly sanitize calculated signal data contained in imported calculated signal files before rendering it on the Trace page. This could allow an attacker to social engineer an authorized user who holds the function right “Read diagnostics” into importing a specially crafted file. Successful exploitation could allow attacker-controlled JavaScript to execute in the user’s br

  2. Oct 22, 2026 · CISA ICS Advisories

    Detected

    CVE-2026-63357 is listed by Siemens SIMATIC S7 PLCs Web Server.

Sources

  • CISA Cybersecurity AdvisoriesGovernment advisoryCVE-2026-63357

    View CSAF Summary SIMATIC S7-1500 devices contain multiple vulnerabilities in the web server that could allow an attacker to execute malicious code in an authorized user’s browser session and perform PLC operations within the scope of that user’s authorization. Siemens is prepari

    cisa.gov
  • CISA ICS AdvisoriesGovernment advisoryCVE-2026-63357

    View CSAF Summary SIMATIC S7-1500 devices contain multiple vulnerabilities in the web server that could allow an attacker to execute malicious code in an authorized user’s browser session and perform PLC operations within the scope of that user’s authorization. Siemens is prepari

    cisa.gov
  • CVE.orgVulnerability recordCVE-2026-63357

    Affected devices do not properly sanitize calculated signal data contained in imported calculated signal files before rendering it on the Trace page. This could allow an attacker to social engineer an authorized user who holds the function right “Read diagnostics” into importing

    cve.org
  • FIRST EPSSExploitation probabilityCVE-2026-63357

    30-day exploitation probability 0.19%

    first.org

References

Freshness

Last verified in this catalog Oct 25, 2026. Significant claims (KEV, EPSS, CVSS, affected ranges) come from the source rows above — open the original publisher for the authoritative advisory.

  • FIRST EPSSOct 25, 2026
  • CISA Cybersecurity AdvisoriesOct 24, 2026
  • CVE.orgOct 23, 2026
  • CISA ICS AdvisoriesOct 23, 2026