What is CVE-2024-42638?

CVE-2024-42638 is a critical-severity vulnerability in H3c Magic B1st, classified under Use of Hard-coded Credentials. CVSS score: 9.8/10. Published 2024-08-16.

How severe is CVE-2024-42638?

Critical severity. CVSS v3 base score is 9.8 out of 10.

Vulnerability in H3c Magic B1st

CVE-2024-42638

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

Published 2024-08-16 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.006 (44.4th percentile), scored 2026-09-30.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 44th percentile — 44.4% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.006 · newest: 0.006 · change: 0.000

Affected products

H3c Magic B1st
H3c Magic B1st Firmware — versions 100r012

Weakness classification (CWE)

CWE-798 — Use of Hard-coded Credentials

References

palm-vertebra-fe9.notion.site/H3C-Magic-B1STV100R012-was-discovered-to-contain-… (Exploit, Third Party Advisory)
www.h3c.com/cn/d_201609/956059_30005_0.htm (Product)

Frequently asked questions

What is CVE-2024-42638?: CVE-2024-42638 is a critical-severity vulnerability in H3c Magic B1st, classified under Use of Hard-coded Credentials. CVSS score: 9.8/10. Published 2024-08-16.
How severe is CVE-2024-42638?: Critical severity. CVSS v3 base score is 9.8 out of 10.