CVE-2024-50387: A SQL injection vulnerability has been reported to affect several QNAP operating system versions

This week

CRITICAL 9.8REMOTEDOWNGRADE

CVE-2024-50387 is a critical-severity flaw (CVSS 9.8) affecting smb service. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

A SQL injection vulnerability has been reported to affect several QNAP operating system versions. If exploited, the vulnerability could allow remote attackers to inject malicious code. We have already fixed the vulnerability in the following version: SMB Service 4.15.002 and later SMB Service h4.15.002 and later

Why this priority

Critical severity
EPSS top 4%: very likely to be exploited
Remotely exploitable, no login, no user action

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

Risk facts

CVSS score	9.8 (Critical)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	10.0% (top 4%)
CISA exploited list	No
Weakness	CWE-89
Published	2024-12-06
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

2024-12-06 17:15 UTCPublished CVE record published
2026-06-17 08:04 UTCUpdated Record last modified

qnap smb service DOWNGRADE

Affected: 4.15.001 · h4.15.001

Fixed in: no fixed release known

Safe to downgrade to: a release before 4.15.001

1. Check installed version

apt-cache policy smb-service || rpm -q smb-service || smb-service --version

2. No fixed release: DOWNGRADE to a release before 4.15.001 (Debian / Ubuntu)

apt-cache madison smb-service sudo apt install smb-service=<VERSION_BEFORE_4.15.001> sudo apt-mark hold smb-service

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

dnf --showduplicates list smb-service sudo dnf downgrade smb-service-<VERSION_BEFORE_4.15.001> sudo dnf versionlock add smb-service

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-2024-50387?

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

Is CVE-2024-50387 being exploited?

CVE-2024-50387 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-2024-50387 affect?

CVE-2024-50387 affects smb service. Severity is critical (CVSS 9.8). A SQL injection vulnerability has been reported to affect several QNAP operating system versions. If exploited, the vulnerability could allow remote attackers to inject malicious code. We have already fixed the vulnerability in the followi

How urgent is CVE-2024-50387?

Priority 63/100. Critical severity; EPSS top 4%: very likely to be exploited; Remotely exploitable, no login, no user action

Software pages

QNAP vulnerabilities

References

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