What is CVE-2021-37501?

CVE-2021-37501 is a high-severity vulnerability in Hdfgroup Hdf5, classified under Out-of-bounds Write. CVSS score: 7.5/10. Published 2023-02-03.

How severe is CVE-2021-37501?

High severity. CVSS v3 base score is 7.5 out of 10.

Buffer overflow in Hdfgroup Hdf5

CVE-2021-37501

Buffer Overflow vulnerability in HDFGroup hdf5-h5dump 1.12.0 through 1.13.0 allows attackers to cause a denial of service via h5tools_str_sprint in /hdf5/tools/lib/h5tools_str.c.

Vulnerability class: Buffer Overflow

Published 2023-02-03 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.

EPSS exploit prediction

EPSS: 0.015 (74.0th percentile), scored 2026-09-30.

Low probability of exploitation in the next 30 days, but still tracked. 74th percentile — 74.0% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.015 · newest: 0.015 · change: 0.000

Affected products

Hdfgroup Hdf5

Weakness classification (CWE)

CWE-787 — Out-of-bounds Write

References

github.com/HDFGroup/hdf5 (Product, Third Party Advisory)
github.com/ST4RF4LL/Something_Found/blob/main/HDF5_v1.13.0_h5dump_heap_overflow… (Exploit, Third Party Advisory)
github.com/HDFGroup/hdf5/issues/2458

Frequently asked questions

What is CVE-2021-37501?: CVE-2021-37501 is a high-severity vulnerability in Hdfgroup Hdf5, classified under Out-of-bounds Write. CVSS score: 7.5/10. Published 2023-02-03.
How severe is CVE-2021-37501?: High severity. CVSS v3 base score is 7.5 out of 10.