Vulnerability · Published Nov 11, 2025 · Assigned by NLOK
CVE-2025-10905Collision in minifilter driver of Avast Free Antivirus results in disabling of real-time protection
Medium 4.4
In plain English
A medium-severity security flaw in Free Antivirus from Avast. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.1% (higher than 2% of all known vulnerabilities).
Severity (CVSS 3.1)4.4Medium
Exploit odds (30 days)0.1%top 97.6% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known
Official description
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.
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| Avast | Free Antivirus | 0 – before 25.9 |
Weakness: CWE-693 · Vector: CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H