CVE-2025-67826

Unknown Unknown - Not Provided

Local Privilege Escalation in K7 Ultimate Security via Named Pipe

Publication date: 2025-12-22

Last updated on: 2025-12-22

Assigner: MITRE

Description

An issue was discovered in K7 Ultimate Security 17.0.2045. A Local Privilege Escalation (LPE) vulnerability in the K7 Ultimate Security antivirus can be exploited by a local unprivileged user on default installations of the product. Insecure access to a named pipe allows unprivileged users to edit any registry key, leading to a full compromise as SYSTEM.

CVSS Scores

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Meta Information

Published

2025-12-22

Last Modified

2025-12-22

Generated

2026-07-06

AI Q&A

2025-12-23

EPSS Evaluated

2026-07-05

NVD

CVE-2025-67826

EUVD

EUVD-2025-204714

Affected Vendors & Products

Vendor	Product	Version / Range
k7	k7_ultimate_security	17.0.2045

Helpful Resources

Exploitability

CWE

KEV

CWE ID	Description
CWE-269	The product does not properly assign, modify, track, or check privileges for an actor, creating an unintended sphere of control for that actor.

Attack-Flow Graph

Executive Summary

CVE-2025-67826 is a Local Privilege Escalation vulnerability in K7 Ultimate Security version 17.0.2045. It occurs because of insecure access to a named pipe, which allows a local unprivileged user to modify any registry key. This can lead to a full system compromise with SYSTEM-level privileges. [1]

Impact Analysis

This vulnerability can allow a local unprivileged user to gain SYSTEM-level privileges on the affected system, resulting in a full compromise of the system. This means an attacker could potentially control the entire system and perform any actions with the highest level of access. [1]

Mitigation Strategies

To mitigate this vulnerability, you should update K7 Ultimate Security to version 17.0.2057 or higher, which includes the fixed K7Sentry.sys version 22.0.0.74 or above. This update addresses the insecure access to the named pipe and prevents local unprivileged users from modifying registry keys and gaining SYSTEM-level privileges. [1]

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