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Vulnerability record · CVE-2026-2638 · published 9 June 2026

CVE-2026-2638: TOCTOU race condition vulnerability

A vulnerability in the quarantine and restore workflow of the X-VPN macOS website versions 77.0 through 77.5 allow a local attacker to leverage a race condition and symlink manipulation to achieve privileged file corruption.

7.3 CVSS 4.0 High EPSS 0.12% · top 98.5% CWE-367 · TOCTOU race condition Awaiting Analysis
7.3CVSS 4.0 base score
0.12%EPSS exploitation probability, 30 days
NoNot in CISA KEV
0Affected product versions listed by NVD
5References
23 Jul 2026Last modified by NVD

Description

A vulnerability in the quarantine and restore workflow of the X-VPN macOS website versions 77.0 through 77.5 allow a local attacker to leverage a race condition and symlink manipulation to achieve privileged file corruption.

CVSS:4.0/AV:L/AC:L/AT:P/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:

References

LinkTags
https://fluidattacks.com/es/advisories/soad
https://xvpn.io/
https://xvpn.io/download/vpn-mac
https://xvpn.io/resources/statement-local-privilege-escalation-vulnerability
https://fluidattacks.com/es/advisories/soad

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Related vulnerabilities

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

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-2026-2638), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.