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CVE-2026-63354

Critical9.4

Affected devices do not properly validate and sanitize visual marker data contained in imported CSV trace 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 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.

CVSS
9.4v4.0
EPSS (exploit probability)
0.4%38th pct
CISA KEV
Not listed

EPSS trendFIRST daily scores, last 90 days

FIRST EPSS held steady from 0.4% on 2026-10-14 to 0.4% on 2026-10-22, ranging 0.4%–0.4% across 9 daily scores.
2026-10-14 → 2026-10-22 · 9 days · 0.4%–0.4%
Daily values
FIRST EPSS daily scores for this CVE
Score dateEPSSPercentile
2026-10-220.4%38.1%
2026-10-210.4%38.1%
2026-10-200.4%37.8%
2026-10-190.4%37.8%
2026-10-180.4%37.7%
2026-10-170.4%37.7%
2026-10-160.4%37.7%
2026-10-150.4%37.6%
2026-10-140.4%37.6%

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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

Coverage1 article

References

Facts sourced from NVD, FIRST EPSS, and CISA KEV. Last synced 2026-10-22 20:34 UTC.

  • CVSS & description: NVD 2.0, fetched 2026-10-22 20:34 UTC
  • EPSS: FIRST EPSS, fetched 2026-10-22 20:34 UTC; score date 2026-10-22
  • KEV: CISA KEV, fetched 2026-10-22 20:34 UTC