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CVE-2020-9451

MEDIUM
5.5
CVSS Score
Published: May 25, 2021 at 11:01 AM UTC
Updated: June 17, 2026 at 03:27 AM UTC
1 product affected across 1 vendorTrue Image 2020

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Severity
MEDIUM5.5
Exploit prediction
EPSS 0.4%

Description

An issue was discovered in Acronis True Image 2020 24.5.22510. anti_ransomware_service.exe keeps a log in a folder where unprivileged users have write permissions. The logs are generated in a predictable pattern, allowing an unprivileged user to create a hardlink from a (not yet created) log file to anti_ransomware_service.exe. On reboot, this forces the anti_ransomware_service to try to write its log into its own process, crashing in a SHARING VIOLATION. This crash occurs on every reboot.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

Patch and advisory references

References (3)

x_refsource_MISCThird Party Advisory
Source: [email protected]
https://danishcyberdefence.dk/blog
x_refsource_MISCExploitThird Party Advisory
Source: [email protected]
https://madsjoensen.dk/cve-2020-9451/
x_refsource_MISCVendor Advisory
Source: [email protected]
https://www.acronis.com

CVSS

5.5MEDIUM[email protected]
Attack Vector
LOCAL
Complexity
LOW
Privileges
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
NONE
Integrity
NONE
Availability
HIGH
Vector?

Quick Info

StatusMODIFIED
CWE
CWE-276

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