Vulnerability in Wellbia Xigncode3
CVE-2026-3609
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.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 7.8 (High). Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.002 (14.1th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 14th percentile — 14.1% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.002 · newest: 0.002 · change: +0.001
Affected products
- Wellbia Xigncode3 — versions 10.0.10011.16384
- Wellbia Xigncode3 Anti-Cheat — versions 10.0.10011.16384
Public proof-of-concept exploits
References
- crcert.or.kr (Broken Link)
- blacksnufkin.github.io/posts/AntiCheat-LPE-CVE-2026-3609/ (Exploit, Third Party Advisory)
- blacksnufkin.github.io/posts/Hunting-the-Hunter/
Frequently asked questions
- What is CVE-2026-3609?
- CVE-2026-3609 is a high-severity vulnerability in Wellbia Xigncode3, classified under CWE-269 IMPROPER PRIVILEGE MANAGEMENT. CVSS score: 7.8/10. Published 2026-05-11.
- How severe is CVE-2026-3609?
- High severity. CVSS v3 base score is 7.8 out of 10.
- Is CVE-2026-3609 known to be exploited?
- 2 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.