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Vulnerabilities

Vulnerability · CVE-2025-10905

Collision 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

Published Nov 11, 2025 · catalog updated Nov 12, 2025 · Avast Free Antivirus

Last checked Nov 3, 2026. A connected source was read within the last 7 days.

Check if you run it

No confirmed exploitation is on record for CVE-2025-10905. EPSS is 0.13%. Act only if a listed version of Avast Free Antivirus is installed.

Gaps on this record

  • No vendor fix or required action is stored. Compare the linked advisory before you change production.
Severity
Medium4.4
Known exploitation
Not in CISA/VulnCheck KEV
EPSS
0.13%
Remediation
Version ranges on file
Affected products
vendor Avast Free Antivirus 0 <25.9

Collision 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.

Are you affected?

Enter the version you run. The result uses only the ranges stored on this record.

The check returns affected, not affected, or incomplete. It does not guess a version that is missing from the record.

  • vendor Avast Free Antivirus 0 <25.90 <25.9

How to fix CVE-2025-10905

  • Upgrade

    CVE-2025-10905 lists a fix boundary at 25.9. Compare the installed build with that boundary before you change production.

  • Version check

    Seen in 0 <25.9

  • Advisory

    Open the cve_org record and follow its fix.

  • Official advisories

What to do

Three questions, each answered from this record only. Confirm the vendor advisory before you patch.

Should you patch?

No confirmed exploitation is on record for CVE-2025-10905. EPSS is 0.13%. Act only if a listed version of Avast Free Antivirus is installed.

Which versions are affected?

Compare what you have installed with Avast Free Antivirus 0 <25.9 0 <25.9. Compare the installed version with the linked vendor advisory before you change production.

What should an analyst verify?

No weakness class is stored. EPSS 0.13%. There is no CISA KEV listing. No Exploit-DB or Metasploit reference is linked. Use the source links for the original advisory.

Technology hubs

Windows security

Code

The project this record applies to. Exploit listings stay in References.

No public source repository is identified for this product.

Timeline

Detection, updates, and resolution for this record.

  1. Nov 11, 2025 · EUVD

    Detected

    Collision 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.

  2. Nov 12, 2025 · EUVD

    Updated

    Collision 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.

Sources

  • CVE.orgVulnerability recordCVE-2025-10905

    Official CVE identifier

    cve.org
  • EUVDVulnerability recordEUVD-2025-84321

    Collision 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.

    euvd.enisa.europa.eu

References

Freshness

Last verified in this catalog Nov 3, 2026. Significant claims (KEV, EPSS, CVSS, affected ranges) come from the source rows above — open the original publisher for the authoritative advisory.

  • CVE.orgOct 25, 2026
  • EUVDOct 25, 2026