CVE-2026-3609: Wellbia's XIGNCODE3 xhunter1.sys kernel driver, version 10.0.10011.16384 through 2023.12.7.78, privilege escal

Routine

HIGH 7.8DOWNGRADE

CVE-2026-3609 is a high-severity flaw (CVSS 7.8) affecting xigncode3. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

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.

Why this priority

High severity
Public exploit reference

No fix is published yet: follow the downgrade or mitigation steps.

Risk facts

CVSS score	7.8 (High)
Attack vector	Local
Attack complexity	Low
Privileges needed	Low
User interaction	None
EPSS exploit chance	0.2% (top 86%)
CISA exploited list	No
Published	2026-05-11
Last modified	2026-10-26

Publisher (CNA): CERT/CC · Vendor: wellbia

Last updated 2026-10-26 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2026-05-11 18:16 UTCPublished CVE record published
2026-10-26 00:10 UTCUpdated Record last modified

wellbia xigncode3 DOWNGRADE

Affected: 10.0.10011.16384

Fixed in: no fixed release known

Safe to downgrade to: a release before 10.0.10011.16384

1. Check installed version

apt-cache policy xigncode3 || rpm -q xigncode3 || xigncode3 --version

2. No fixed release: DOWNGRADE to a release before 10.0.10011.16384 (Debian / Ubuntu)

apt-cache madison xigncode3 sudo apt install xigncode3=<VERSION_BEFORE_10.0.10011.16384> sudo apt-mark hold xigncode3

2. No fixed release: DOWNGRADE (RHEL / Amazon Linux / Fedora)

dnf --showduplicates list xigncode3 sudo dnf downgrade xigncode3-<VERSION_BEFORE_10.0.10011.16384> sudo dnf versionlock add xigncode3

Downgrade risk

Downgrading can break dependent software and may reopen older bugs. Read the distro advisory first and test on a non-production host.

After downgrade

Restart the service, and keep the package held until a fixed release ships.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2026-3609?

xigncode3: downgrade or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2026-3609 being exploited?

CVE-2026-3609 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2026-3609 affect?

CVE-2026-3609 affects xigncode3. Severity is high (CVSS 7.8). 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_

How urgent is CVE-2026-3609?

Priority 36/100. High severity; Public exploit reference

References

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