CVE-2025-71326

AVAST Antivirus 25.11 Unquoted Service Path Privilege Escalation

CVSS 8.5 HIGHEPSS 0.1%CWE-428

Vexday Risk Score

41Attention

SSVC decision (CISA)

Attend

PoC available → attend closely

CVSS 8.5EPSS 0.1%KEV nãoPoC públicaNuclei —Metasploit —Patch —

Lifecycle

19 Jun 2026Published on NVD

Recommendation: Plan a near-term fix — a public PoC already exists.

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.

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

Affected products

Avast · AVAST Antivirus

public PoCs found — 1

cve_referencewww.exploit-db.com/exploits/52510unverified

⚠ Public resources, to assess the exposure of systems you control or are authorized to test. Test only with authorization.

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References

https://www.avast.com/https://www.exploit-db.com/exploits/52510 https://www.vulncheck.com/advisories/avast-antivirus-unquoted-service-path-privilege-escalation