CVE-2020-1283Public exploit

System crash via AppInfo symbolic-link traversal

Published Jun 9, 2020 · Updated Aug 4, 2024

Denial of service in affected Microsoft Windows and Windows Server releases allows local users to make a system stop responding. The AppInfo service runs as SYSTEM and follows attacker-controlled pseudo-symlinks while CreateDirectoryTree creates missing AppX directories, enabling protected-path directory creation. Exploitation requires local low-privileged execution or a user opening a crafted file from a network share; creating a cng.sys directory causes a crash on reboot that requires repair.

CVSS severity6.5
Medium
EPSS probability8.82%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Denial of service in affected Microsoft Windows and Windows Server releases allows local users to make a system stop responding. The AppInfo service runs as SYSTEM and follows attacker-controlled pseudo-symlinks while CreateDirectoryTree creates missing AppX directories, enabling protected-path directory creation. Exploitation requires local low-privileged execution or a user opening a crafted file from a network share; creating a cng.sys directory causes a crash on reboot that requires repair.

The record

CVE
CVE-2020-1283
Published
Jun 9, 2020
Updated
Aug 4, 2024
Vendor
Microsoft
Product
Windows 10 Version 1909
Classifications
T1499.004
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Jun 9, 2020CVE publishedPublication date reported by the CVE source.
  2. Aug 4, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=unspecified

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

Microsoft · Windows 10 Version 1909version=unspecified
Microsoft · Windows Server, version 1903 (Server Core installation)version=unspecified
Microsoft · Windowsversion=10 Version 1607 for 32-bit Systems; version=10 Version 1607 for x64-based Systems; version=10 Version 1709 for 32-bit Systems; version=10 Version 1709 for ARM64-based Systems; version=10 Version 1709 for x64-based Systems; version=10 Version 1803 for 32-bit Systems; version=10 Version 1803 for ARM64-based Systems; version=10 Version 1803 for x64-based Systems; version=10 Version 1809 for 32-bit Systems; version=10 Version 1809 for ARM64-based Systems; version=10 Version 1809 for x64-based Systems
Microsoft · Windows 10 Version 2004version=unspecified
Microsoft · Windows Server, version 2004 (Server Core installation)version=unspecified
Microsoft · Windows Serverversion=2016; version=2016 (Core installation); version=2019; version=2019 (Core installation); version=version 1803 (Core Installation)
Microsoft · Windows Server, version 1909 (Server Core installation)version=unspecified
Microsoft · Windows 10 Version 1903version=unspecified

Published CVSS scores

7.1NIST NVDAV:N/AC:M/Au:N/C:N/I:N/A:C
6.5NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

T1499.004Application or System Exploitation

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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