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CVE-2020-17103

Exploitation likely. EPSS gives it a 22% chance of exploitation in the next 30 days. Fixed versions are out.

CVSS 3.17.0HighEPSS percentile98th22% chance in 30 daysCISA KEVNot listedNo confirmed exploitation
No public exploit knownFix4 products6 fixed builds listed below

Published Updated Sources: CVE.org, NVD, BDU

NVD CVE.org

What to do

Find your product and version, then upgrade to the build on the right.

  • Microsoft Windows 10 Version 1809Affected: ≥ 10.0.17763.0, < 10.0.17763.8880Upgrade to: 10.0.17763.8880Stated by: CVE record
  • Microsoft Windows 11 version 23H2Affected: ≥ 10.0.22631.0, < 10.0.22631.7219Upgrade to: 10.0.22631.7219Affected: ≥ 10.0.26100.0, < 10.0.26100.8655Upgrade to: 10.0.26100.8655Affected: ≥ 10.0.26200.0, < 10.0.26200.8655Upgrade to: 10.0.26200.8655Affected: ≥ 10.0.28000.0, < 10.0.28000.2269Upgrade to: 10.0.28000.2269Stated by: CVE record
  • Microsoft Windows Server 2019Affected: ≥ 10.0.17763.0, < 10.0.17763.8880Upgrade to: 10.0.17763.8880Stated by: CVE record
  • Microsoft Windows Server 2025Affected: ≥ 10.0.26100.0, < 10.0.26100.32995Upgrade to: 10.0.26100.32995Stated by: CVE record

Versions as the sources state them. Full version matrix after sign-in

Check it yourselfA free OpenVAS check exists for this CVE. Run it against your hosts.Is your organisation exposed?Request an assessment to establish which checks fit your systems.

Coverage timeline

2 publishers

  1. Technical analysis published

    ·Хабр — Информационная безопасность summary

  2. Vendor patch released

    ·Ars Technica (Security)

Sourced from public security reporting — each date is when it was published, not when it happened. 9 further articles named this CVE in wider roundups without reporting it as a distinct event.

What it is

From the CVE record

Windows Cloud Files Mini Filter Driver Elevation of Privilege Vulnerability

In plain language

No plain-language summary for this CVE yet.

Exploitation

Where each signal puts this CVE on the scale from published to confirmed exploited.

EPSS98th
CISA KEV

Not in the catalog. CISA has not confirmed exploitation.

Public exploits

No public exploit or proof of concept found in the sources we track.

EPSS

22% chance of exploitation activity in the next 30 days, which ranks it in the 98th percentile of scored CVEs.

Exploit Prediction Scoring System, FIRST.org. A probability, not a confirmation.

Lifecycle

10 events over 2028 days, from the signal feeds we watch.

  1. EPSS band changelow → moderate
  2. EPSS band changelow → moderate
  3. EPSS band changelow → moderate
  4. OpenVAS check added
  5. EPSS band changelow → moderate
  6. Patch availablerecord updated

Affected products

And 19 more affected products. See all after sign-in

Technical detail

CVSS 3.1 vector

Open in the CVSS calculator

CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H

Scored 7.0 by NVD.

How it is reached

  • Attack Vector LocalRequires local access to the vulnerable system (e.g. local login, malicious file)
  • Attack Complexity HighRequires specific conditions like a race condition or non-default configuration
  • Privileges Required LowRequires basic user-level privileges
  • User Interaction NoneNo user interaction needed — fully automated exploitation

Scope

  • Scope UnchangedImpact is limited to the vulnerable component itself

Impact if exploited

  • Confidentiality HighTotal information disclosure — all data in the component is compromised
  • Integrity HighTotal loss of integrity — attacker can modify any data in the component
  • Availability HighTotal denial of service — the component is completely unavailable

Weaknesses

ATT&CK techniques

Mapped from the weaknesses above (CWE to ATT&CK), not observed in attacks.

Sources

References in the record

And 1 more reference. See all after sign-in

In the news

All news

Watch the software you run.

My Stack ranks new CVEs for your products by real-world exploitation, so the next serious one reaches you without reading every advisory.

We'll flag the next CVE, public exploit or patch for Windows 10 Version 1809, not every advisory.