CVE-2026-63353CWE-79cross-site-scripting

CVE-2026-63353

Critical · published October 13, 2026

CVSS v3.1
9.6
EPSS
0%
Percentile
34.4
In the wild
Unconfirmed
What it is

Affected devices do not properly sanitize comment fields contained in imported trace files before rendering them 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 trace 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.

The record
Technical detail
CVSS v3.1
9.6 · CRITICAL
Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H
CVSS v4.0
9.4 · CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H
EPSS
0.00413 · 34.4th percentile
Weakness
CWE-79 · Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
Published
2026-10-13T14:17Z
References (1)
https://cert-portal.siemens.com/productcert/html/ssa-591731.html · [email protected]
EPSS history
Timeline
  • 15 OCT 03:33Z
    EPSS moved — → 0%
    epss
  • 13 OCT 09:18Z
    Affected devices do not properly sanitize comment fields contained in imported trace files before rendering them on the Trace page
    cvelistv5
  • 13 OCT 09:18Z
    Affected devices do not properly sanitize comment fields contained in imported trace files before rendering them on the Trace page
    cvelistv5