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Fencer Intel
high 7.8

CVE-2020-1271 json

An elevation of privilege vulnerability exists when the Windows Backup Service improperly handles file operations.To exploit this vulnerabi…

published 6y ago modified 4mo ago also EUVD-2020-12150

cvss
7.8
version 3.1, NVD
cisa kev
Not listed
not in CISA's catalog
epss
0.8%
EPSS 0.8% chance of exploitation in 30 days, percentile 58%
public exploits
0
none known

Summary

An elevation of privilege vulnerability exists when the Windows Backup Service improperly handles file operations.To exploit this vulnerability, an attacker would first have to gain execution on the victim system, aka 'Windows Backup Service Elevation of Privilege Vulnerability'.

Patch / fix

Is CVE-2020-1271 in your stack? Fencer shows which of your repositories are affected as soon as an advisory lands, and opens the fix as a pull request.

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Exploit prediction

0.85% chance of exploitation in the next 30 days, higher than 58% of all scored CVEs (FIRST EPSS, 2026-11-09).

CVSS scores

assigned by version score vector
NVD 3.1 7.8 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
NVD 2.0 4.6 AV:L/AC:L/Au:N/C:P/I:P/A:P

Affected products

  • Microsoft Windows 10 Version 2004 for x64-based Systems
  • Microsoft Windows
  • Microsoft Windows Server
  • Microsoft Windows 10 Version 1909 for 32-bit Systems
  • Microsoft Windows 10 Version 1909 for x64-based Systems
  • Microsoft Windows 10 Version 1909 for ARM64-based Systems
  • Microsoft Windows Server, version 1909 (Server Core installation)
  • Microsoft Windows 10 Version 1903 for 32-bit Systems
  • Microsoft Windows 10 Version 1903 for x64-based Systems
  • Microsoft Windows 10 Version 1903 for ARM64-based Systems
  • Microsoft Windows Server, version 1903 (Server Core installation)
  • Microsoft Windows 10 Version 2004 for 32-bit Systems
  • Microsoft Windows 10 Version 2004 for ARM64-based Systems
  • Microsoft Windows Server, version 2004 (Server Core installation)

References

Sources

Fencer Intel keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.