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CVE-2026-85114

High8.7

A vulnerability has been identified in .NET Client Library for SIMATIC S7 Webserver API (All versions < V3.3.61). Affected applications do not properly validate filenames received from remote servers during ticket downloads. This could allow an attacker who can manipulate the ticket response to write arbitrary files outside the intended download directory and, when overwriting is enabled, replace existing files accessible to the application.

CVSS
8.7v4.0
EPSS (exploit probability)
0.4%37th 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%37.4%
2026-10-210.4%37.4%
2026-10-200.4%37.1%
2026-10-190.4%37.1%
2026-10-180.4%37.0%
2026-10-170.4%37.0%
2026-10-160.4%37.0%
2026-10-150.4%36.9%
2026-10-140.4%36.8%

CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N/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 19:34 UTC.

  • CVSS & description: NVD 2.0, fetched 2026-10-22 19:34 UTC
  • EPSS: FIRST EPSS, fetched 2026-10-22 19:34 UTC; score date 2026-10-22
  • KEV: CISA KEV, fetched 2026-10-22 19:34 UTC