How severe is CVE-2025-6270?

CVE-2025-6270 has a CVSS 3.x base score of 5.3, rated medium severity. It is exploitable over local access with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is low, integrity low, and availability low.

Is CVE-2025-6270 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (10th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2025-6270?

CVE-2025-6270 affects Hdfgroup Hdf5. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2025-6270?

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

Does CVE-2025-6270 have an EU (EUVD) identifier?

Yes. CVE-2025-6270 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-18688.

When was CVE-2025-6270 published?

CVE-2025-6270 was published on 2025-06-19 and last updated on 2026-06-17.

CVE-2025-6270

CVE-2025-6270 is a medium-severity vulnerability in Hdfgroup Hdf5 with a CVSS 3.x base score of 5.3. 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-119.

Key facts

Severity: Medium (CVSS 3.x base score 5.3)
CVSS v2: 4.3
CVSS v4: 1.9
EPSS exploit prediction: 0% (10th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2025-18688
Weakness: CWE-119
Affected product: Hdfgroup Hdf5
Published: 2025-06-19
Last modified: 2026-06-17

Description

A vulnerability, which was classified as critical, has been found in HDF5 up to 1.14.6. Affected by this issue is the function H5FS__sect_find_node of the file H5FSsection.c. The manipulation leads to heap-based buffer overflow. It is possible to launch the attack on the local host. The exploit has been disclosed to the public and may be used.

Frequently asked questions

What is CVE-2025-6270?: A vulnerability, which was classified as critical, has been found in HDF5 up to 1.14.6. Affected by this issue is the function H5FS__sect_find_node of the file H5FSsection.c. The manipulation leads to heap-based buffer overflow. It is possible to launch the attack on the local host. The exploit has been disclosed to the public and may be used.
How severe is CVE-2025-6270?: CVE-2025-6270 has a CVSS 3.x base score of 5.3, rated medium severity. It is exploitable over local access with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is low, integrity low, and availability low.
Is CVE-2025-6270 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (10th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2025-6270?: CVE-2025-6270 affects Hdfgroup Hdf5. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2025-6270?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2025-6270 have an EU (EUVD) identifier?: Yes. CVE-2025-6270 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-18688.
When was CVE-2025-6270 published?: CVE-2025-6270 was published on 2025-06-19 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:hdfgroup:hdf5:*:*:*:*:*:*:*:*

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