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Description

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 Reserved 2026-06-08 | Published 2026-06-19 | Updated 2026-06-22 | Assigner VulnCheck




HIGH: 8.5CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
HIGH: 7.8CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Problem types

Unquoted Search Path or Element

Product status

25.11
affected

Credits

Milad Karimi (Ex3ptionaL) finder

References

www.exploit-db.com/exploits/52510 (ExploitDB-52510) exploit

www.avast.com/ (Official Product Homepage) product

www.vulncheck.com/...uoted-service-path-privilege-escalation (VulnCheck Advisory: AVAST Antivirus 25.11 Unquoted Service Path Privilege Escalation) third-party-advisory

cve.org (CVE-2025-71326)

nvd.nist.gov (CVE-2025-71326)

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