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CVE-2020-1112Windows Background Intelligent Transfer Service Elevation of Privilege Vulnerability

Description

An elevation of privilege vulnerability exists when the Windows Background Intelligent Transfer Service (BITS) IIS module improperly handles uploaded content. An attacker who successfully exploited this vulnerability could upload restricted file types to an IIS-hosted folder. To exploit this vulnerability, an attacker would require permissions to upload files via BITS. An attacker could then submit a specially crafted request to upload a file. The security update addresses the vulnerability by correcting how Windows BITS validates file names.

Timeline

  1. ID reserved

    By microsoft

  2. · 7 months later

    Published

  3. · 6 years later

    Record updated

Changes after publication (a new score, a public exploit, EPSS crossing 1, 10 or 50 %, leaving KEV) are kept since November 2026; earlier ones are not known.

Scores

CVSS scores of CVE-2020-1112, by who scored it
Scored byCVSSScoreVector
microsoftCNA (assigner)3.1High8.5CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H/E:P/RL:O/RC:C
NVDNVD · Modified3.1High8.5CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H
EPSS (exploitation in 30 days)
3.3% · top 11% of all CVEs (13 Nov 2026)
Loading the EPSS history…

The list uses the assigner's score when there is one, then CISA's, then NVD's: High 8.5.

Affected products

References

References2

Sources

The same CVE in the primary databases and aggregators, to check against.

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Record last updated .