CVE-2024-9200: A post-authentication command injection vulnerability in the "host" parameter of the diagnostic function in Zy
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HIGH 7.2MITIGATEMITIGATEMITIGATE
CVE-2024-9200 is a high-severity flaw (CVSS 7.2) affecting emg6726-b10a firmware, vmg3927-b50b firmware, vmg4005-b50a firmware. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.
A post-authentication command injection vulnerability in the "host" parameter of the diagnostic function in Zyxel VMG4005-B50A firmware versions through V5.15(ABQA.2.2)C0 could allow an authenticated attacker with administrator privileges to execute operating system (OS) commands on a vulnerable device.
Why this priority
High severity
No fix is published yet: follow the downgrade or mitigation steps.
Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score
Am I affected?
Timeline
Published CVE record published
Updated Record last modified
zyxel emg6726-b10a firmware MITIGATE
Affected: < 5.13\(abnp.8\)c1
Fixed in: 5.13\(abnp.8\)c1
Safe to downgrade to: no unaffected older release
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.
zyxel vmg3927-b50b firmware MITIGATE
Affected: < 5.13\(ably.9\)c1
Fixed in: 5.13\(ably.9\)c1
Safe to downgrade to: no unaffected older release
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.
zyxel vmg4005-b50a firmware MITIGATE
Affected: < 5.15\(abqa.2.3\)c0
Fixed in: 5.15\(abqa.2.3\)c0
Safe to downgrade to: no unaffected older release
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.
zyxel vmg4005-b60a firmware MITIGATE
Affected: < 5.15\(abqa.2.3\)c0
Fixed in: 5.15\(abqa.2.3\)c0
Safe to downgrade to: no unaffected older release
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.
zyxel vmg4005-b50b firmware MITIGATE
Affected: < 5.13\(abrl.5.2\)c0
Fixed in: 5.13\(abrl.5.2\)c0
Safe to downgrade to: no unaffected older release
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.
zyxel vmg4927-b50a firmware MITIGATE
Affected: < 5.13\(ably.9\)c1
Fixed in: 5.13\(ably.9\)c1
Safe to downgrade to: no unaffected older release
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 sourceNVD · 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-2024-9200?
emg6726-b10a firmware: mitigate or apply the listed mitigation; vmg3927-b50b firmware: mitigate or apply the listed mitigation; vmg4005-b50a firmware: mitigate or apply the listed mitigation. Exact commands for each OS are on this page.
Is CVE-2024-9200 being exploited?
CVE-2024-9200 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-2024-9200 affect?
CVE-2024-9200 affects emg6726-b10a firmware, vmg3927-b50b firmware, vmg4005-b50a firmware. Severity is high (CVSS 7.2). A post-authentication command injection vulnerability in the "host" parameter of the diagnostic function in Zyxel VMG4005-B50A firmware versions through V5.15(ABQA.2.2)C0 could allow an authenticated attacker with administrator privileges t
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