CISA KEV · Known exploitedHigh

CVE-2020-17087

Microsoft Windows

CVE-2020-17087 affects Microsoft Windows. Review the CVSS score, exploitation signals, affected versions, remediation status, and linked source material before making a change.

CVSS
7.8
EPSS
5.39%
91.9% percentile
CISA KEV
Listed
Published
2020.11.11
PRIORITY ASSESSMENT

Immediate review

CISA has listed this vulnerability in the Known Exploited Vulnerabilities catalog.

Known exploitationConfirmed by CISA KEV
Exploit probability5.39%
Technical severityCVSS 7.8

Vulnerability overview

CVE-2020-17087 affects Microsoft Windows. Review the CVSS score, exploitation signals, affected versions, remediation status, and linked source material before making a change.

Affected product and versions

Product
Microsoft Windows
Affected versions
10.0.0, 6.1.0, 6.3.0, 6.0.0, 6.2.0, r2, 20h2, 1903, 1909, 2004
Fixed versions
No verified fixed-version field is available yet

Recommended response sequence

Confirm exposure before applying a vendor-supported change.

Full remediation guide
CISA required action

Apply updates per vendor instructions.

Due date: 2022.05.03
  1. 1
    Identify

    Confirm that Microsoft Windows and an affected version are present.

  2. 2
    Prioritize

    Combine exploitation signals with asset exposure and business criticality.

  3. 3
    Remediate

    Follow the vendor advisory or supported update path and preserve rollback options.

  4. 4
    Verify

    Recheck the version, service health, access paths, and relevant logs.

Technical data

CVSS vector
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
CWE
CWE-131
KEV added
2021.11.03
Ransomware use
미확인
CVE-2020-17087 — Microsoft Windows | SECUFOCUS NOW