4.4

CVE-2025-10905: avast free_antivirus Protection Mechanism Failure

CVSS: 4.4v3.1MediumDeferred
Published 11-11-2025Last modified 12-11-2025
Open JSON

Vulnerability summary

CVE-2025-10905 is a medium (CVSS 4.4) Protection Mechanism Failure vulnerability in avast free_antivirus. EPSS estimates a 0.13% chance of exploitation in the next 30 days, higher than 2.1% of scored vulnerabilities.

Overall risk
18/100
0100
Low · default modelHow is this calculated?
CVSS score
4.4/10
010
Medium · v3.1 (CVE.org)
EPSS score
0.13%
0%100%
Low · +0.01 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Timeline

  1. 11-11-2025
    PublishedVulnerability first disclosed.
  2. 12-11-2025
    Last modifiedVulnerability information updated.

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.

CVSS metrics

2 scores · 2 sources · 1 version

EPSS trend

Probability

0.13%

Chance of exploitation in the next 30 days

Percentile

2%

Versus all other CVEs

30-day change

+0.01 pp

From 0.12% on 21-09-2026

21-09-202621-10-2026
EPSS score
0.13%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Avast1 product

1 vendor · 1 product

References

1 links