Vulnerability · Published Jun 19, 2026 · Assigned by VulnCheck
CVE-2025-71326AVAST Antivirus 25.11 Unquoted Service Path Privilege Escalation
High 7.8
In plain English
A high-severity security flaw in AVAST Antivirus from Avast. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.2% (higher than 8% of all known vulnerabilities).
Severity (CVSS 3.1)7.8High
Exploit odds (30 days)0.2%top 92.1% of all CVEs
Exploited in the wildNo reportsCISA SSVC: poc
Attack toolingNoneno public tooling known
Official 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.
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| Avast | AVAST Antivirus | 25.11 |
Weakness: CWE-428 · Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
References
- ExploitDB-52510 exploit
- Official Product Homepage product
- VulnCheck Advisory: AVAST Antivirus 25.11 Unquoted Service Path Privilege Escalation third-party-advisory