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Vulnerability record · CVE-2025-61037 · published 31 December 2025

CVE-2025-61037: Sevencs ec2007 kernel toctou race condition vulnerability

Sevencs · Ec2007 Kernel

A local privilege escalation vulnerability exists in SevenCs ORCA G2 2.0.1.35 (EC2007 Kernel v5.22). The flaw is a Time-of-Check Time-of-Use (TOCTOU) race condition in the license management logic. The regService process, which runs with SYSTEM privileges, creates a fixed directory and writes files without verifying whether the path is an NTFS reparse point. By exploiting this race condition, an attacker can replace the target directory with a junction pointing to a user-controlled path. This causes the SYSTEM-level process to drop binaries in a location fully controlled by the attacker, allowing arbitrary code execution with SYSTEM privileges. The vulnerability can be exploited by any standard user with only a single UAC confirmation, making it highly practical and dangerous in real-world environments.

7.0 CVSS 3.1 High EPSS 0.15% · top 96.3% CWE-367 · TOCTOU race condition
7.0CVSS 3.1 base score
0.15%EPSS exploitation probability, 30 days
NoNot in CISA KEV
2Affected product versions listed by NVD
1References, 1 tagged exploit
17 Jun 2026Last modified by NVD

Description

A local privilege escalation vulnerability exists in SevenCs ORCA G2 2.0.1.35 (EC2007 Kernel v5.22). The flaw is a Time-of-Check Time-of-Use (TOCTOU) race condition in the license management logic. The regService process, which runs with SYSTEM privileges, creates a fixed directory and writes files without verifying whether the path is an NTFS reparse point. By exploiting this race condition, an attacker can replace the target directory with a junction pointing to a user-controlled path. This causes the SYSTEM-level process to drop binaries in a location fully controlled by the attacker, allowing arbitrary code execution with SYSTEM privileges. The vulnerability can be exploited by any standard user with only a single UAC confirmation, making it highly practical and dangerous in real-world environments.

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

Affected products

2 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://gist.github.com/jc0818/233462416579661e4e2795f96457a6bf ExploitThird Party Advisory

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

7.8CVE-2025-64699Sevencs ec2007 kernel incorrect permission assignment vulnerabilityAn incorrect NULL DACL issue exists in SevenCs ORCA G2 2.0.1.35 (EC2007 Kernel v5.22). The regService process, which runs with SYSTEM privileges, app…EPSS 0.16%5.1CVE-2015-3246libuser userhelper direct /etc/passwd write race conditionlibuser before 0.56.13-8 and 0.60 before 0.60-7, as used by the userhelper program in the usermode package, modifies /etc/passwd directly instead of …KEVEPSS 8.8%analysed7.8CVE-2025-38352Linux kernel POSIX CPU timer TOCTOU race enables local privilege escalationA time-of-check to time-of-use race exists in the Linux kernel between handle_posix_cpu_timers() and posix_cpu_timer_del(). When an exiting non-autor…KEVEPSS 1.3%analysed8.2CVE-2025-22224VMware ESXi and Workstation TOCTOU race leads to out-of-bounds writeVMware ESXi, Workstation, and related products contain a TOCTOU race condition that results in an out-of-bounds write. An attacker with local adminis…KEVEPSS 1.6%analysed7.0CVE-2024-30088Windows Kernel TOCTOU race condition privilege escalationCVE-2024-30088 is a time-of-check time-of-use (TOCTOU) race condition in the Windows kernel that allows a local user to elevate privileges. It affect…KEVEPSS 68%analysed7.0CVE-2022-48618Apple OS Pointer Authentication Bypass via TOCTOU Race ConditionA time-of-check time-of-use race condition in Apple's pointer authentication implementation allows an attacker who already holds arbitrary read and w…KEVEPSS 0.49%analysed8.8CVE-2023-35311Microsoft Outlook security feature bypass via TOCTOU race conditionCVE-2023-35311 is a security feature bypass in Microsoft Outlook caused by a time-of-check time-of-use (TOCTOU) race condition (CWE-367). It affects …KEVEPSS 16%analysed

Source: NIST National Vulnerability Database (record CVE-2025-61037), CISA KEV, FIRST EPSS (scores of 2026-09-27). This page is refreshed as NVD updates the record.