CVE-2025-11837: An improper control of generation of code vulnerability has been reported to affect Malware Remover

This week

CRITICAL 9.8REMOTEUPGRADE

CVE-2025-11837 is a critical-severity flaw (CVSS 9.8) affecting malware remover. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

An improper control of generation of code vulnerability has been reported to affect Malware Remover. The remote attackers can then exploit the vulnerability to bypass protection mechanism. We have already fixed the vulnerability in the following version: Malware Remover 6.6.8.20251023 and later

Why this priority

Critical severity
CISA SSVC: automatable with total technical impact
Remotely exploitable, no login, no user action

A fixed release or distro patch exists.

Risk facts

CVSS score	9.8 (Critical)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	1.5% (top 25%)
CISA exploited list	No
Weakness	CWE-94
Published	2026-01-02
Last modified	2026-06-17

Publisher (CNA): QNAP Systems, Inc. · Vendor: qnap

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2026-01-02 16:15 UTCPublished CVE record published
2026-06-17 08:31 UTCUpdated Record last modified

qnap malware remover UPGRADE

Affected: >= 6.6.3 and < 6.6.8.20251023

Fixed in: 6.6.8.20251023

Safe to downgrade to: a release before 6.6.3

1. Check installed version

apt-cache policy malware-remover || rpm -q malware-remover || malware-remover --version

2. UPGRADE to 6.6.8.20251023 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade malware-remover

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade malware-remover

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

3. If no update is available yet, DOWNGRADE to a release before 6.6.3 (Debian / Ubuntu)

apt-cache madison malware-remover sudo apt install malware-remover=<VERSION_BEFORE_6.6.3> sudo apt-mark hold malware-remover

3. If no update is available yet, DOWNGRADE (RHEL / Amazon Linux / Fedora)

dnf --showduplicates list malware-remover sudo dnf downgrade malware-remover-<VERSION_BEFORE_6.6.3> sudo dnf versionlock add malware-remover

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.

Exact fixes by distribution

Fedora ELN · fwupd-efi · FIXED · 1.9-3.eln159 · FEDORA-2026-44fd42db42 · source

sudo dnf upgrade --advisory=FEDORA-2026-44fd42db42

Fedora 46 · crest · FIXED · 3.0.2-1.fc46 · FEDORA-2026-b49adefa8f · source

sudo dnf upgrade --advisory=FEDORA-2026-b49adefa8f

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-2025-11837?

malware remover: upgrade to 6.6.8.20251023. Exact commands for each OS are on this page.

Is CVE-2025-11837 being exploited?

CVE-2025-11837 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-2025-11837 affect?

CVE-2025-11837 affects malware remover. Severity is critical (CVSS 9.8). An improper control of generation of code vulnerability has been reported to affect Malware Remover. The remote attackers can then exploit the vulnerability to bypass protection mechanism. We have already fixed the vulnerability in the fol

How urgent is CVE-2025-11837?

Priority 61/100. Critical severity; CISA SSVC: automatable with total technical impact; Remotely exploitable, no login, no user action

Software pages

QNAP vulnerabilities

References

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