How severe is CVE-2021-45829?

CVE-2021-45829 has a CVSS 3.x base score of 5.5, rated medium severity. It is exploitable over local access with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is none, integrity none, and availability high.

Is CVE-2021-45829 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (48th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-45829?

CVE-2021-45829 affects Hdfgroup Hdf5. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2021-45829?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

When was CVE-2021-45829 published?

CVE-2021-45829 was published on 2022-01-03 and last updated on 2026-06-17.

CVE-2021-45829

CVE-2021-45829 is a medium-severity vulnerability in Hdfgroup Hdf5 with a CVSS 3.x base score of 5.5. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-404.

Key facts

Severity: Medium (CVSS 3.x base score 5.5)
CVSS v2: 4.3
EPSS exploit prediction: 1% (48th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-404
Affected product: Hdfgroup Hdf5
Published: 2022-01-03
Last modified: 2026-06-17

Description

HDF5 1.13.1-1 is affected by: segmentation fault, which causes a Denial of Service.

Frequently asked questions

What is CVE-2021-45829?: HDF5 1.13.1-1 is affected by: segmentation fault, which causes a Denial of Service.
How severe is CVE-2021-45829?: CVE-2021-45829 has a CVSS 3.x base score of 5.5, rated medium severity. It is exploitable over local access with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is none, integrity none, and availability high.
Is CVE-2021-45829 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (48th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-45829?: CVE-2021-45829 affects Hdfgroup Hdf5. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2021-45829?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2021-45829 published?: CVE-2021-45829 was published on 2022-01-03 and last updated on 2026-06-17.

References

https://github.com/HDFGroup/hdf5/issues/1317

Affected products (1)

cpe:2.3:a:hdfgroup:hdf5:1.13.1-1:*:*:*:*:*:*:*

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