Collision in minifilter driver of Avast Free Antivirus results in disabling of real-time protection

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2025-10905
StatePUBLISHED
AssignerNLOK
Source PriorityCVE Program / NVD first with legacy fallback
Published2025-11-11 16:15:37 UTC
Updated2026-06-17 08:29:14 UTC
DescriptionCollision in MiniFilter driver in Avast Software Avast Free Antivirus  before 25.9  on Windows allows a local attacker with administrative privileges to disable real-time protection and self-defense mechanisms.

Risk And Classification

Primary CVSS: v3.1 4.4 MEDIUM from [email protected]

CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H

Problem Types: CWE-693 | CWE-693 CWE-693 Protection Mechanism Failure

VersionSourceTypeScoreSeverityVector
3.1[email protected]Secondary4.4MEDIUMCVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H
3.1CNACVSS4.4MEDIUMCVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H

CVSS v3.1 Breakdown

Attack Vector
Local
Attack Complexity
Low
Privileges Required
High
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
None
Availability
High

CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Avast Free Antivirus affected 25.9 custom Windows

References

ReferenceSourceLinkTags
www.gendigital.com/us/en/contact-us/security-advisories/) [email protected] www.gendigital.com
CVE Program record CVE.ORG www.cve.org canonical
NVD vulnerability detail NVD nvd.nist.gov canonical, analysis

Vendor Comments And Credit

Discovery Credit

CNA: Dongchan Seo (en)

Additional Advisory Data

Solutions

CNA: Upgrade to Avast 25.9 or newer

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