CVE-2022-27600: An uncontrolled resource consumption vulnerability has been reported to affect several QNAP operating system v

Q: How do I fix CVE-2022-27600?

qts: upgrade to 4.5.4.2280, 5.0.1.2277; quts hero: upgrade to h4.5.4.2374, h5.0.1.2277; qutscloud: upgrade to c5.0.1.2374. Exact commands for each OS are on this page.

Q: Is CVE-2022-27600 being exploited?

CVE-2022-27600 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2022-27600 affect?

CVE-2022-27600 affects qts, quts hero, qutscloud. Severity is medium (CVSS 6.8). An uncontrolled resource consumption vulnerability has been reported to affect several QNAP operating system versions. If exploited, the vulnerability could allow remote attackers to launch a denial-of-service (DoS) attack. We have already

Q: How urgent is CVE-2022-27600?

Priority 41/100. Remotely exploitable, no login, no user action

This month

MEDIUM 6.8REMOTEUPGRADEUPGRADEUPGRADE

CVE-2022-27600 is a medium-severity flaw (CVSS 6.8) affecting qts, quts hero, qutscloud. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

An uncontrolled resource consumption vulnerability has been reported to affect several QNAP operating system versions. If exploited, the vulnerability could allow remote attackers to launch a denial-of-service (DoS) attack. We have already fixed the vulnerability in the following versions: QTS 5.0.1.2277 and later QTS 4.5.4.2280 build 20230112 and later QuTS hero h5.0.1.2277 build 20230112 and later QuTS hero h4.5.4.2374 build 20230417 and later

Why this priority

Remotely exploitable, no login, no user action

A fixed release or distro patch exists.

Risk facts

CVSS score	6.8 (Medium)
Attack vector	Network (remote)
Attack complexity	High
Privileges needed	None
User interaction	None
EPSS exploit chance	0.6% (top 52%)
CISA exploited list	No
Weakness	CWE-400, CWE-798
Published	2024-12-19
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

2024-12-19 02:15 UTCPublished CVE record published
2026-06-17 04:37 UTCUpdated Record last modified

qnap qts UPGRADE

Affected: >= 4.5.1 and < 4.5.4.2280 · >= 5.0.0 and < 5.0.1.2277 · 4.5.4.2280 · 5.0.1.2277

Fixed in: 4.5.4.2280, 5.0.1.2277

Safe to downgrade to: a release before 4.5.1

Check your OS release

cat /etc/os-release; uname -r

Debian / Ubuntu

sudo apt update && sudo apt full-upgrade

RHEL / Amazon Linux / Fedora

sudo dnf upgrade --refresh

Windows

Install the latest cumulative update from Windows Update

If no patch exists yet

OS downgrades are not safe. Apply the vendor mitigation from the advisory and restrict exposure.

qnap quts hero UPGRADE

Affected: >= h4.5.1 and < h4.5.4.2374 · >= h5.0 and < h5.0.1.2277 · h4.5.4.2374 · h5.0.1.2277

Fixed in: h4.5.4.2374, h5.0.1.2277

Safe to downgrade to: a release before h4.5.1

Check your OS release

cat /etc/os-release; uname -r

Debian / Ubuntu

sudo apt update && sudo apt full-upgrade

RHEL / Amazon Linux / Fedora

sudo dnf upgrade --refresh

Windows

Install the latest cumulative update from Windows Update

If no patch exists yet

OS downgrades are not safe. Apply the vendor mitigation from the advisory and restrict exposure.

qnap qutscloud UPGRADE

Affected: >= c5.0.1 and < c5.0.1.2374

Fixed in: c5.0.1.2374

Safe to downgrade to: a release before c5.0.1

Check your OS release

cat /etc/os-release; uname -r

Debian / Ubuntu

sudo apt update && sudo apt full-upgrade

RHEL / Amazon Linux / Fedora

sudo dnf upgrade --refresh

Windows

Install the latest cumulative update from Windows Update

If no patch exists yet

OS downgrades are not safe. Apply the vendor mitigation from the advisory and restrict exposure.

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-2022-27600?

qts: upgrade to 4.5.4.2280, 5.0.1.2277; quts hero: upgrade to h4.5.4.2374, h5.0.1.2277; qutscloud: upgrade to c5.0.1.2374. Exact commands for each OS are on this page.

Is CVE-2022-27600 being exploited?

CVE-2022-27600 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-2022-27600 affect?

CVE-2022-27600 affects qts, quts hero, qutscloud. Severity is medium (CVSS 6.8). An uncontrolled resource consumption vulnerability has been reported to affect several QNAP operating system versions. If exploited, the vulnerability could allow remote attackers to launch a denial-of-service (DoS) attack. We have already

How urgent is CVE-2022-27600?

Priority 41/100. Remotely exploitable, no login, no user action

Software pages

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References

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