CVE-2021-44205 | Local privilege escalation due to DLL hijacking vulnerability

Local privilege escalation due to DLL hijacking vulnerability. The following products are affected: Acronis Cyber Protect Home Office (Windows) before build 39612, Acronis True Image 2021 (Windows) before build 39287

Published: 2022-02-04 Last update: 2024-11-21 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2021-44205 is rated Low Risk (33.8/100): CVSS High severity, with low exploitation likelihood (EPSS 0.05%). Monitor for updates and reassess as exploit intelligence or EPSS changes.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Exploit prediction scoring system (EPSS) score for CVE-2021-44205

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2025-03-17 0.04% 0.05% +0.01%
2 2023-03-07 0.89% 0.04% -0.84%
3 2022-02-08 — 0.89% —

Full EPSS history (3 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2021-44205

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
7.3 3.1 HIGH
CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:H Click to expand
Attack vector (AV:L)
They already need access on the box, or another person has to do something wrong; it’s not a remote drive-by.
Attack complexity (AC:L)
Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:L)
A normal user session is enough; they don’t have to be admin.
User interaction (UI:R)
A real person has to do something—click, install, enable—otherwise it doesn’t land.
Scope (S:U)
Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:H)
Serious risk that confidential data gets exposed in a big way.
Integrity (I:H)
They could widely tamper with or forge data—trust in the data is badly hurt.
Availability (A:H)
Could take the service down hard or make it unusable for people who depend on it.
 1.3 5.9 [email protected]
4.4 2.0 MEDIUM
AV:L/AC:M/Au:N/C:P/I:P/A:P Click to expand
Access vector (AV:L)
Requires local access to the target system.
Access complexity (AC:M)
Exploitation needs some favorable conditions, but not exceptional ones.
Authentication (AU:N)
No authentication is required.
Confidentiality impact (C:P)
Partial confidentiality impact.
Integrity impact (I:P)
Partial integrity impact.
Availability impact (A:P)
Partial availability impact.
 3.4 6.4 [email protected]

Weakness enumeration for CVE-2021-44205

Affected software / configurations for CVE-2021-44205

Vendor Product Version Raw CPE
acronis true_image 2021 cpe:2.3:a:acronis:true_image:2021:-:*:*:*:windows:*:*
acronis true_image 2021 cpe:2.3:a:acronis:true_image:2021:update_1:*:*:*:windows:*:*
acronis true_image 2021 cpe:2.3:a:acronis:true_image:2021:update_2:*:*:*:windows:*:*
acronis true_image 2021 cpe:2.3:a:acronis:true_image:2021:update_3:*:*:*:windows:*:*
acronis true_image 2021 cpe:2.3:a:acronis:true_image:2021:update_4:*:*:*:windows:*:*
acronis cyber_protect_home_office — cpe:2.3:a:acronis:cyber_protect_home_office:-:*:*:*:*:*:*:*

References for CVE-2021-44205

cvelogic Threat Intelligence