X-VPN macOS website versions - Local Privilege Escalation

published 2026-06-09 5 mo ago modified 2026-07-23 3 mo ago also EUVD-2026-35404

cvss: 7.3; version 4.0, CNA
cisa kev: Not listed; not in CISA's catalog
epss: 0.1%; EPSS 0.1% chance of exploitation in 30 days, percentile 0%
public exploits: 0; none known

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.

Patch / fix

links 1

xvpn.io/download/vpn-mac patch

CISA SSVC

Exploitation: Proof of concept is public
Automatable: no
Technical impact: total
Assessed: 5 mo ago (2026-06-09)

Exploit prediction

0.08% chance of exploitation in the next 30 days, higher than 0% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

fluidattacks.com https://fluidattacks.com/es/advisories/soad referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by	version	score	vector
CNA	4.0	7.3	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
CNA	4.0	7.3	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:X/V:X/RE:X/U:X

Affected products

X-VPN X-VPN macOS website

Classification

Weakness

CWE-367 Time-of-check Time-of-use (TOCTOU) Race Condition

References

xvpn.io /download/vpn-mac
patch
fluidattacks.com /es/advisories/soad
third-party-advisory, exploit
xvpn.io /resources/statement-local-privilege-escalation-vulnerability
vendor-advisory
xvpn.io /
product

Sources

CVE List CVE-2026-2638
NVD CVE-2026-2638

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.

Summary