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CVE-2024-42638: H3C Magic B1ST v100R012 was discovered to contain a hardcoded password vulnerability in /etc/shadow, which all

56
This week
CRITICAL 9.8REMOTEMITIGATE

CVE-2024-42638 is a critical-severity flaw (CVSS 9.8) affecting magic b1st firmware. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

H3C Magic B1ST v100R012 was discovered to contain a hardcoded password vulnerability in /etc/shadow, which allows attackers to log in as root.

Why this priority

  • Critical severity
  • Public exploit reference
  • Remotely exploitable, no login, no user action

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

Risk facts

CVSS score9.8 (Critical)
Attack vectorNetwork (remote)
Attack complexityLow
Privileges neededNone
User interactionNone
EPSS exploit chance0.6% (top 53%)
CISA exploited listNo
WeaknessCWE-798
Published2024-08-16
Last modified2026-06-17
Publisher (CNA): MITRE · Vendor: h3c

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

Am I affected?

Timeline

h3c magic b1st firmware MITIGATE
Affected: 100r012
Fixed in: no fixed release known
Safe to downgrade to: a release before 100r012
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-2024-42638?

magic b1st firmware: mitigate or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2024-42638 being exploited?

CVE-2024-42638 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-2024-42638 affect?

CVE-2024-42638 affects magic b1st firmware. Severity is critical (CVSS 9.8). H3C Magic B1ST v100R012 was discovered to contain a hardcoded password vulnerability in /etc/shadow, which allows attackers to log in as root.

How urgent is CVE-2024-42638?

Priority 56/100. Critical severity; Public exploit reference; Remotely exploitable, no login, no user action

References

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