What is CVE-2020-18232?

CVE-2020-18232 is a high-severity vulnerability in Hdfgroup Hdf5, classified under Out-of-bounds Write. CVSS score: 8.8/10. Published 2023-08-22.

How severe is CVE-2020-18232?

High severity. CVSS v3 base score is 8.8 out of 10.

Buffer overflow in Hdfgroup Hdf5

CVE-2020-18232

Buffer Overflow vulnerability in function H5S_close in H5S.c in HDF5 1.10.4 allows remote attackers to run arbitrary code via creation of crafted file.

Vulnerability class: Buffer Overflow

Published 2023-08-22 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 8.8 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.011 (64.0th percentile), scored 2026-09-29.

Low probability of exploitation in the next 30 days, but still tracked. 64th percentile — 64.0% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.011 · newest: 0.011 · change: 0.000

Affected products

Hdfgroup Hdf5 — versions 1.10.4

Weakness classification (CWE)

CWE-787 — Out-of-bounds Write

References

github.com/winson2004aa/PAAFS/tree/master/vul2 (Exploit, Third Party Advisory)

Frequently asked questions

What is CVE-2020-18232?: CVE-2020-18232 is a high-severity vulnerability in Hdfgroup Hdf5, classified under Out-of-bounds Write. CVSS score: 8.8/10. Published 2023-08-22.
How severe is CVE-2020-18232?: High severity. CVSS v3 base score is 8.8 out of 10.