CVE-2020-0787 (GCVE-0-2020-0787)
Vulnerability from cvelistv5 – Published: 2020-03-12 15:48 – Updated: 2025-10-21 23:35Summary
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'.
Severity
7.8 (High)
SSVC
Exploitation: active
Automatable: no
Technical Impact: total
CISA Coordinator (v2.0.3)
CWE
- Elevation of Privilege
- CWE-59 - Improper Link Resolution Before File Access ('Link Following')
Assigner
References
3 references
| URL | Tags |
|---|---|
| https://portal.msrc.microsoft.com/en-US/security-… | x_refsource_MISC |
| http://packetstormsecurity.com/files/158056/Backg… | x_refsource_MISC |
| https://www.cisa.gov/known-exploited-vulnerabilit… | government-resource |
Impacted products
10 products
| Vendor | Product | Version | |
|---|---|---|---|
| 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
|
CISA KEV
Known Exploited Vulnerability - GCVE BCP-07 Compliant
KEV entry ID: c34a93a2-b769-43ce-9cc6-95a9ff332f9b
Exploited: Yes
Timestamps
First Seen: 2022-01-28
Asserted: 2022-01-28
Scope
Notes: KEV entry: Microsoft Windows Background Intelligent Transfer Service (BITS) Improper Privilege Management Vulnerability | Affected: Microsoft / Windows | Description: Microsoft Windows BITS is vulnerable to to a privilege elevation vulnerability if it improperly handles symbolic links. An actor can exploit this vulnerability to execute arbitrary code with system-level privileges. | Required action: Apply updates per vendor instructions. | Due date: 2022-07-28 | Known ransomware campaign use (KEV): Known | Notes (KEV): https://nvd.nist.gov/vuln/detail/CVE-2020-0787
Evidence
Type: Vendor Report
Signal: Successful Exploitation
Confidence: 80%
Source: cisa-kev
Details
| Cwes | CWE-269 CWE-59 |
|---|---|
| Feed | CISA Known Exploited Vulnerabilities Catalog |
| Product | Windows |
| Due Date | 2022-07-28 |
| Date Added | 2022-01-28 |
| Vendorproject | Microsoft |
| Vulnerabilityname | Microsoft Windows Background Intelligent Transfer Service (BITS) Improper Privilege Management Vulnerability |
| Knownransomwarecampaignuse | Known |
References
Created: 2026-02-02 12:28 UTC
| Updated: 2026-02-06 07:17 UTC
EUVD KEV
Known Exploited Vulnerability - GCVE BCP-07 Compliant
KEV entry ID: c0b7ff50-0a0e-4188-883b-7a8ed93231ee
Exploited: Yes
Timestamps
First Seen: 2025-01-23
Asserted: 2025-01-23
Scope
Notes: Affected: Microsoft / Windows BITS26 | Exploitation type: ransomware | Origin source: cnw
Evidence
Type: Csirt Report
Signal: Confirmed Compromise
Confidence: 75%
Source: enisa-cnw-kev
Details
| Cwes | - |
|---|---|
| Euvd | EUVD-2020-2274 |
| Notes | - |
| Catalog | ENISA / EU CSIRTs Network (CNW) KEV CSV |
| Product | Windows BITS26 |
| Datereported | 23/01/25 |
| Originsource | cnw |
| Vendorproject | Microsoft |
| Exploitationtype | ransomware |
| Vulnerabilityname | - |
| Threatactorsexploiting | - |
References
Created: 2026-02-02 12:25 UTC
| Updated: 2026-02-06 07:17 UTC
KEVintel KEV
Known Exploited Vulnerability - GCVE BCP-07 Compliant
KEV entry ID: 946fe3d0-5299-4424-acf5-d378e2f190f9
Exploited: Yes
Timestamps
First Seen: 2022-01-28
Asserted: 2022-01-28
Scope
Notes: KEVIntel entry: An elevation of privilege vulnerability exists when the Windows Background Intelligent Transfer Service (BITS) improperly handles symbolic links,... | Affected: Microsoft / Windows, Windows Server, Windows 10 Version 1909 for 32-bit Systems, Windows 10 Version 1909 for x64-based Systems, Windows 10 Version 1909 for ARM64-based Systems, Windows Server, version 1909 (Server Core installation), Windows 10 Version 1903 for 32-bit Systems, Windows 10 Version 1903 for x64-based Systems, Windows 10 Version 1903 for ARM64-based Systems, Windows Server, version 1903 (Server Core installation) | CVSS: 7.8 (HIGH) | Used in malware: yes | Not yet in CISA KEV: False
Evidence
Type: Public Report
Signal: Confirmed Compromise
Confidence: 70%
Source: kevintel
Details
| Feed | KEVIntel (kevintel.com) |
|---|---|
| Title | An elevation of privilege vulnerability exists when the Windows Background Intelligent Transfer Service (BITS) improperly handles symbolic links,... |
| Vendor | Microsoft |
| Product | Windows, Windows Server, Windows 10 Version 1909 for 32-bit Systems, Windows 10 Version 1909 for x64-based Systems, Windows 10 Version 1909 for ARM64-based Systems, Windows Server, version 1909 (Server Core installation), Windows 10 Version 1903 for 32-bit Systems, Windows 10 Version 1903 for x64-based Systems, Windows 10 Version 1903 for ARM64-based Systems, Windows Server, version 1903 (Server Core installation) |
| Added Date | 2022-01-28T00:00:00.000Z |
| Cvss Score | 7.8 |
| Epss Score | None |
| Cvss Severity | HIGH |
| Epss Percentile | None |
| Used In Malware | yes |
| Ahead Of Cisa Kev | None |
| Not Yet In Cisa Kev | False |
References
Created: 2026-06-19 12:47 UTC
| Updated: 2026-06-19 12:47 UTC
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"lastModified": "2024-11-21T04:54:12.867",
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}
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Experimental. This forecast is provided for visualization only and may change without notice. Do not use it for operational decisions.
Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.
Sightings
| Author | Source | Type | Date | Other |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or observed by the user.
- Confirmed: The vulnerability has been validated from an analyst's perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
- Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
- Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
- Not confirmed: The user expressed doubt about the validity of the vulnerability.
- Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.
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