CVE-2020-10863Public exploit

Host shutdown via low-integrity RPC call

Published Apr 1, 2020 · Updated Aug 4, 2024

Denial of service in Avast Antivirus before 20 allows local users to shut down Windows through an Avast Service RPC call. The aswTask endpoint in AvastSvc.exe accepts a TaskEx TempShutDownMachine RPC request from a Low Integrity process and performs the shutdown. Code execution in a local Low Integrity process is required, and successful exploitation shuts down the host rather than only stopping the antivirus service.

CVSS severity7.5
High
EPSS probability2.08%
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 Avast Antivirus before 20 allows local users to shut down Windows through an Avast Service RPC call. The aswTask endpoint in AvastSvc.exe accepts a TaskEx TempShutDownMachine RPC request from a Low Integrity process and performs the shutdown. Code execution in a local Low Integrity process is required, and successful exploitation shuts down the host rather than only stopping the antivirus service.

The record

CVE
CVE-2020-10863
Published
Apr 1, 2020
Updated
Aug 4, 2024
Vendor
Unknown vendor
Product
Unknown product
Classifications
T1529
Attack vector
local
Privileges
Unavailable

Timeline

How it unfolded

  1. Apr 1, 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?

Affected buildAffected product and version details are unavailable.

What conditions does exploitation require?

Attack vectorlocal
Required privilegesUnavailable in this record.

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

7.5NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
5.0NIST NVDAV:N/AC:L/Au:N/C:N/I:N/A:P

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 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
PrivilegesUnavailable
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

T1529System Shutdown/Reboot

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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