CVE-2025-71326 | AVAST Antivirus 25.11 contains an unquoted service path vuln… | CVSS 7.8 HIGH

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.

Metadata

CVE ID: CVE-2025-71326
State: PUBLISHED
Assigner: VulnCheck
Reserved: 2026-06-08 20:44 UTC
Published: 2026-06-19 14:16 UTC
Last updated: 2026-06-19 14:16 UTC
Primary CWE: CWE-428
Unquoted Search Path or Element
Vendor / Product: Avast / AVAST Antivirus
Sources: cve.org · NVD

Severity & Metrics

7.8 HIGH CVSS 3.1

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Affected products (1)

Vendor	Product	Platform	Versions
Avast	AVAST Antivirus	—	25.11

Weakness (CWE)

CWE	Source	Description
CWE-428	cna	Unquoted Search Path or Element

CVSS scores (2)

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

References (3)

ExploitDB-52510 https://www.exploit-db.com/exploits/52510
Official Product Homepage https://www.avast.com/
VulnCheck Advisory: AVAST Antivirus 25.11 Unquoted Service Path Privilege Escalation https://www.vulncheck.com/advisories/avast-antivirus-unquoted-service-path-privilege-escalation