# CVE-2026-3609: XIGNCODE3 xhunter1.sys kernel driver contains a Privilege Escalation Vulnerability

> A local attacker can exploit the XIGNCODE3 kernel driver to gain PROCESS_ALL_ACCESS privileges, leading to privilege escalation.

- **Severity:** Medium 5.3 (`CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L`)
- **Exploited in the wild:** Not known
- **Login needed:** Any signed-in user
- **Attackable:** Local or same network only
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 11 May 2026
- **Updated:** 5 Aug 2026
- **Also known as:** GHSA-4gcg-jv45-v47x

## What is CVE-2026-3609?

CVE-2026-3609 is a medium-severity vulnerability in Wellbia XIGNCODE3, published on 11 May 2026. It can only be exploited from the same machine or local network, with no action from the victim.

### Official description

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.

## Which versions are affected by CVE-2026-3609?

It affects 1 product.


Products: Wellbia Xigncode3.

## How do I fix CVE-2026-3609?

No fix has been published for CVE-2026-3609 yet. Limit exposure of the affected software until one is available.

## Is CVE-2026-3609 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-3609 exists.

Public exploit code:

- BYOVD research use cases featuring vulnerable driver discovery and reverse engineering methodology.  (CVE-2025-52915,  CVE-2025-1055, CVE-2026-3609, CVE-2026-8501). (github_poc): https://github.com/BlackSnufkin/BYOVD
- PoC for CVE-2026-3609 - XIGNCODE3 xhunter1.sys handle leak enabling PPL bypass and LSASS dumping (github_poc): https://github.com/BlackSnufkin/CredsHunter

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-3609 and fix it if it is affected.

What it is: CVE-2026-3609 is a medium-severity vulnerability in Wellbia XIGNCODE3, published on 11 May 2026. It can only be exploited from the same machine or local network, with no action from the victim.
Exploitation: It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-3609 exists.

Affected product: Wellbia XIGNCODE3. No package-level version data is available, so check the vendor advisory linked from the reference page.

Task:
1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.
2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.
3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.
4. Run the tests and summarise what changed and why.
5. If nothing in the project is affected, say so and change nothing.

Reference: https://insights.sbomify.com/CVE-2026-3609/ (Markdown: https://insights.sbomify.com/CVE-2026-3609/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-3609
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-3609
- OSV: https://osv.dev/vulnerability/CVE-2026-3609

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-3609/
Summaries are generated and may contain mistakes; the official description above is the record.