Vulnerability in Avast Antivirus
CVE-2025-71326
AVAST Antivirus 25.11 contains an unquoted service path vulnerability in the SecureLine service that allows local non-privileged users to execute code with elevated SYSTEM privileges. Attackers can exploit the unquoted binary path in the service configuration to inject malicious executables that execute with high-level system permissions.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 7.8 (High). Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.002 (7.0th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 7th percentile — 7.0% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.002 · newest: 0.002 · change: 0.000
Affected products
- Avast Antivirus — versions 25.11
Weakness classification (CWE)
References
- ExploitDB-52510 (exploit)
- Official Product Homepage (product)
- VulnCheck Advisory: AVAST Antivirus 25.11 Unquoted Service Path Privilege Escalation (third-party-advisory)
Frequently asked questions
- What is CVE-2025-71326?
- CVE-2025-71326 is a high-severity vulnerability in Avast Antivirus, classified under Unquoted Search Path or Element. CVSS score: 7.8/10. Published 2026-06-19.
- How severe is CVE-2025-71326?
- High severity. CVSS v3 base score is 7.8 out of 10.