CVE-2024-38433: Nuvoton - CWE-305: Authentication Bypass by Primary Weakness
An attacker with write access to the SPI-Flash o
26
Routine
MEDIUM 6.7UPGRADEUPGRADEUPGRADE
CVE-2024-38433 is a medium-severity flaw (CVSS 6.7) affecting npcm750r firmware, npcm710r firmware, npcm730r firmware. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.
Nuvoton - CWE-305: Authentication Bypass by Primary Weakness
An attacker with write access to the SPI-Flash on an NPCM7xx BMC subsystem that uses the Nuvoton BootBlock
reference code can modify the u-boot image header on flash parsed by the BootBlock which could lead to arbitrary code
execution.
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
nuvoton npcm750r firmware UPGRADE
Affected: < 10.10.19
Fixed in: 10.10.19
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.
nuvoton npcm710r firmware UPGRADE
Affected: < 10.10.19
Fixed in: 10.10.19
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.
nuvoton npcm730r firmware UPGRADE
Affected: < 10.10.19
Fixed in: 10.10.19
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.
nuvoton npcm705r firmware UPGRADE
Affected: < 10.10.19
Fixed in: 10.10.19
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-2024-38433?
npcm750r firmware: upgrade to 10.10.19; npcm710r firmware: upgrade to 10.10.19; npcm730r firmware: upgrade to 10.10.19. Exact commands for each OS are on this page.
Is CVE-2024-38433 being exploited?
CVE-2024-38433 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-2024-38433 affect?
CVE-2024-38433 affects npcm750r firmware, npcm710r firmware, npcm730r firmware. Severity is medium (CVSS 6.7). Nuvoton - CWE-305: Authentication Bypass by Primary Weakness
An attacker with write access to the SPI-Flash on an NPCM7xx BMC subsystem that uses the Nuvoton BootBlock
reference code can modify the u-boot image header on flash parsed by t
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