CVE-2021-44204

Local privilege escalation via improperly protected named pipe

Published Feb 4, 2022 · Updated Sep 17, 2024

Local privilege escalation in four Acronis Windows products allows local users to gain elevated privileges through a named pipe. The affected software performs improper access-control checks on a named pipe used to communicate with a privileged process. Exploitation requires existing high privileges and user interaction, and successful abuse permits control over protected data and services.

CVSS severity6.5
Medium
EPSS probability0.20%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Local privilege escalation in four Acronis Windows products allows local users to gain elevated privileges through a named pipe. The affected software performs improper access-control checks on a named pipe used to communicate with a privileged process. Exploitation requires existing high privileges and user interaction, and successful abuse permits control over protected data and services.

The record

CVE
CVE-2021-44204
Published
Feb 4, 2022
Updated
Sep 17, 2024
Vendor
Acronis
Product
Acronis True Image
Classifications
CWE-285, T1068
Attack vector
local
Privileges
admin

Timeline

How it unfolded

  1. Feb 4, 2022CVE publishedPublication date reported by the CVE source.
  2. Sep 17, 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 <39287

What conditions does exploitation require?

Attack vectorlocal
Required privilegesadmin

What is affected?

Acronis · Acronis True Imageversion=unspecified <39287
Acronis · Acronis Cyber Protect Home Officeversion=unspecified <39612
Acronis · Acronis Cyber Protect 15version=unspecified <28035
Acronis · Acronis Agentversion=unspecified <27147

Published CVSS scores

4.6NIST NVDAV:L/AC:L/Au:N/C:P/I:P/A:P
6.5AcronisCVSS:3.0/AV:L/AC:L/PR:H/UI:R/S:U/C:H/I:H/A:H
7.8NIST NVDCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/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.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

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
Privilegesadmin
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-285Improper Authorization
T1068Exploitation for Privilege Escalation

Public exploit references

No public exploit references are available in this record.

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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