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ReviewHigh

CVE-2020-1121

Microsoft Windows 10 Version 1809, Windows 10 Version 1903 for 32-bit Systems, Windows 10 Version 1903 for ARM64-based Systems

An elevation of privilege vulnerability exists when Windows improperly handles calls to Clipboard Service. An attacker who successfully exploited this vulnerability could run arbitrary code in the security context of the local system. An attacker could then install programs; view, change, or delete data; or create new accounts with full user rights. To exploit this vulnerability, an attacker would first have to log on to the system. An attacker could then run a specially crafted application that could exploit the vulnerability and take control over an affected system. The update addresses t...

CVSS
7
EPSS
0.84%
55.3% percentile
CISA KEV
Not listed
Published
2020.05.22
PRIORITY ASSESSMENT

Review

The CVSS severity warrants an early asset and exposure review.

Known exploitationNot established by KEV
Exploit probability0.84%
Technical severityCVSS 7

Vulnerability overview

An elevation of privilege vulnerability exists when Windows improperly handles calls to Clipboard Service. An attacker who successfully exploited this vulnerability could run arbitrary code in the security context of the local system. An attacker could then install programs; view, change, or delete data; or create new accounts with full user rights. To exploit this vulnerability, an attacker would first have to log on to the system. An attacker could then run a specially crafted application that could exploit the vulnerability and take control over an affected system. The update addresses t...

Affected product and versions

Product
Microsoft Windows 10 Version 1809, Windows 10 Version 1903 for 32-bit Systems, Windows 10 Version 1903 for ARM64-based Systems
Affected versions
>= 10.0.17763.0 < publication, >= 10.0.0 < publication, 1809, 1903, 1909
Fixed versions
No verified fixed-version field is available yet

Recommended response sequence

Confirm exposure before applying a vendor-supported change.

Full remediation guide
  1. 1
    Identify

    Confirm that Microsoft Windows 10 Version 1809, Windows 10 Version 1903 for 32-bit Systems, Windows 10 Version 1903 for ARM64-based Systems 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:H/PR:L/UI:N/S:U/C:H/I:H/A:H
CWE
Not available