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CVE-2026-3609

HighPublished

XIGNCODE3 xhunter1.sys kernel driver contains a Privilege Escalation Vulnerability

Published: May 11, 2026
Updated: Aug 5, 2026
Assigning CNA: certcc
Evidence observed: Aug 5, 2026

Primary CVSS

7.8/ 10High

nvd · CVSS 3.1

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

EPSS probability estimate

0.2%

Low · next 30 days

Percentile: 14.3%
Model date: Sep 21, 2026

EPSS is a statistical estimate, not a certainty or a measure of impact. Combine it with CVSS, KEV status, exposure and your environment.

Summary

Wellbia's XIGNCODE3 xhunter1.sys kernel driver, version 10.0.10011.16384 through 2023.12.7.78, privilege escalation vulnerability provides access to the IRP_MJ_WRITE command interface, which allows any user process to request a PROCESS_ALL_ACCESS. Note: KVE 2023-5589 (https://krcert.or.kr) was initially issued for version 10.0.10011.16384, but the vulnerability was not fully remediated and remains in version 2023.12.7.78.

Sources

CredsHunterPoC
PoC for CVE-2026-3609 - XIGNCODE3 xhunter1.sys handle leak enabling PPL bypass and LSASS dumping
BYOVDPoC
BYOVD research use cases featuring vulnerable driver discovery and reverse engineering methodology. (CVE-2025-52915, CVE-2025-1055, CVE-2026-3609, CVE-2026-8501).

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