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CVE-2020-0787

Improper Link Resolution Before File Access

CVSS 3.1 High 7.8Known exploited (CISA KEV)

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

Description

An elevation of privilege vulnerability exists when the Windows Background Intelligent Transfer Service (BITS) improperly handles symbolic links, aka 'Windows Background Intelligent Transfer Service Elevation of Privilege Vulnerability'.

Official description from the CVE record, published by microsoft. Copyright © 1999-2026 The MITRE Corporation. See /security/cve/legal for the CVE license. View the record on cve.org

Key data

CVSS 3.1 High 7.8

Score published by CISA-ADP in the CVE record.

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

  • Attack vector: Local

    The attacker needs local access to the system, or to trick a user into running something.

  • Attack complexity: Low

    No special conditions are needed. The attack can be repeated at will.

  • Privileges required: None

    No account or privileges are needed.

  • User interaction: Required

    A user has to do something first, such as opening a file or following a link.

  • Scope: Unchanged

    The impact stays within the vulnerable component.

  • Confidentiality impact: High

    Serious or total effect on the secrecy of data.

  • Integrity impact: High

    Serious or total effect on the trustworthiness of data.

  • Availability impact: High

    Serious or total effect on availability.

CVSS is owned and managed by FIRST.Org, Inc. (FIRST) and is used by permission. Each CVSS score on this site is shown together with its vector string, as published in the CVE record by the source named next to it. Learn more at first.org/cvss.

EPSS

Exploit Prediction Scoring System by FIRST: an estimate of the probability that exploitation activity will be observed in the next 30 days.
Score
0.42524 (42.5% probability)
Percentile
98.7%
Scores of
Nov 10, 2026
Model
v2026.06.15

CISA Known Exploited Vulnerabilities

This CVE is listed in the CISA KEV catalog.
Name in the catalog
Microsoft Windows Background Intelligent Transfer Service (BITS) Improper Privilege Management Vulnerability
Added to the catalog
Jan 28, 2022
Federal due date
Jul 28, 2022
Ransomware campaigns
Known use

CISA assessment as of Nov 23, 2021

Stakeholder-Specific Vulnerability Categorization (SSVC) decision points added by CISA.
Exploitation
Recorded by CISA as active
Automatable
no
Technical impact
total

Weakness (CWE)

CWE catalog version 5.0.
CWE names: Copyright © 2006-2026, The MITRE Corporation. See /security/cve/legal for the CWE license.
  • CWE-59Improper Link Resolution Before File Access

Affected products

Products listed in the CVE record, as the CNA published them.

  • Microsoft Windows

    • affected: 10 Version 1803 for 32-bit Systems
    • affected: 10 Version 1803 for x64-based Systems
    • affected: 10 Version 1803 for ARM64-based Systems
    • affected: 10 Version 1809 for 32-bit Systems
    • affected: 10 Version 1809 for x64-based Systems
    • affected: 10 Version 1809 for ARM64-based Systems
    • affected: 10 Version 1709 for 32-bit Systems
    • affected: 10 Version 1709 for x64-based Systems
    • affected: 10 Version 1709 for ARM64-based Systems
    • affected: 10 for 32-bit Systems
    • affected: 10 for x64-based Systems
    • affected: 10 Version 1607 for 32-bit Systems
    • affected: 10 Version 1607 for x64-based Systems
    • affected: 7 for 32-bit Systems Service Pack 1
    • affected: 7 for x64-based Systems Service Pack 1
    • affected: 8.1 for 32-bit systems
    • affected: 8.1 for x64-based systems
    • affected: RT 8.1

  • Microsoft Windows Server

    • affected: version 1803 (Core Installation)
    • affected: 2019
    • affected: 2019 (Core installation)
    • affected: 2016
    • affected: 2016 (Core installation)
    • affected: 2008 for 32-bit Systems Service Pack 2
    • affected: 2008 for 32-bit Systems Service Pack 2 (Core installation)
    • affected: 2008 for Itanium-Based Systems Service Pack 2
    • affected: 2008 for x64-based Systems Service Pack 2
    • affected: 2008 for x64-based Systems Service Pack 2 (Core installation)
    • affected: 2008 R2 for Itanium-Based Systems Service Pack 1
    • affected: 2008 R2 for x64-based Systems Service Pack 1
    • affected: 2008 R2 for x64-based Systems Service Pack 1 (Core installation)
    • affected: 2012
    • affected: 2012 (Core installation)
    • affected: 2012 R2
    • affected: 2012 R2 (Core installation)

  • Microsoft Windows 10 Version 1909 for 32-bit Systems

    • affected: unspecified

  • Microsoft Windows 10 Version 1909 for x64-based Systems

    • affected: unspecified

  • Microsoft Windows 10 Version 1909 for ARM64-based Systems

    • affected: unspecified

  • Microsoft Windows Server, version 1909 (Server Core installation)

    • affected: unspecified

  • Microsoft Windows 10 Version 1903 for 32-bit Systems

    • affected: unspecified

  • Microsoft Windows 10 Version 1903 for x64-based Systems

    • affected: unspecified

  • Microsoft Windows 10 Version 1903 for ARM64-based Systems

    • affected: unspecified

  • Microsoft Windows Server, version 1903 (Server Core installation)

    • affected: unspecified

References

Links listed in the CVE record. They lead to other sites, which CubePath does not control.

Timeline

  1. ID reserved
  2. Record published
  3. Added to CISA KEV
  4. Record last updated

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Data from the CVE Program (MITRE), CISA KEV and FIRST EPSS. CVSS is owned by FIRST and used by permission. Not affiliated with or endorsed by MITRE, CISA or FIRST. Data as of Nov 10, 2026, 19:33 UTC. Sources and licenses