Cyber Resilience

CVE-2025-71326

HighPublic PoC

Published: 19 June 2026

Published
19 June 2026
Modified
23 June 2026
KEV Added
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Patch
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CVSS Score v4 8.5 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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
EPSS Score 0.0013 2.7th percentile
Risk Priority 55 floored blend · peak EPSS

Summary

CVE-2025-71326 is a high-severity Unquoted Search Path or Element (CWE-428) vulnerability in Avast (inferred from references). Its CVSS base score is 8.5 (High).

Operationally, exploitation aligns with the MITRE ATT&CK technique Path Interception by Unquoted Path (T1574.009); ranked at the 2.7th percentile by exploit likelihood (below the median); it is not currently listed in the CISA KEV catalog; a public proof-of-concept is referenced.

EU & UK References

Vulnerability details

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…

more

that execute with high-level system permissions.

CWE(s)
CWE-428

Related Threats

MITRE ATT&CK Enterprise TechniquesAI

T1574.009 Path Interception by Unquoted Path Stealth
Adversaries may execute their own malicious payloads by hijacking vulnerable file path references.
attack.mitre.org →
Why these techniques?

Unquoted service path in Windows service directly matches Path Interception by Unquoted Path (T1574.009) for local privilege escalation to SYSTEM.

Confidence: HIGH · MITRE ATT&CK Enterprise v19.0

Affected Assets

Avast
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inferred from references and description; NVD did not file a CPE for this CVE

Mitigating Controls

No mitigating controls mapped yet. The per-CVE control annotator has not reached this CVE.

References