CVE-2026-20931HIGH 8.0EPSS p51.4%

CVE-2026-20931CVE-2026-20931

microsoft / windows_10_1607

Description

External control of file name or path in Windows Telephony Service allows an authorized attacker to elevate privileges over an adjacent network.

Scoring

CVSS 3.18.0 (HIGH)
VectorCVSS:3.1/AV:A/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
EPSS0.75% probability of exploitation · percentile 51.4% · 2026-08-03T12:00:16Z
Published2026-01-13
Last modified2026-07-30

Underlying weaknesses· 1

CWE-73

References

  1. https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-20931
  2. https://www.vicarius.io/vsociety/posts/cve-2026-20931-detection-script-elevation-of-privilege-vulnerability-in-windows-telephony-service
  3. https://www.vicarius.io/vsociety/posts/cve-2026-20931-mitigation-script-elevation-of-privilege-vulnerability-in-windows-telephony-service

1

TypeTargetConfidenceTier
WeaknessExternal Control of File Name or Pathcwe-730%live

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Sourced from NVD + FIRST.org EPSS. Curated for EU compliance use cases by Adam Lundqvist, Founder at SQUR.