How severe is CVE-2025-66382?

CVE-2025-66382 has a CVSS 3.x base score of 2.9, rated low severity. It is exploitable over local access with high attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability low.

Is CVE-2025-66382 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (11th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2025-66382?

CVE-2025-66382 affects Libexpat Project Libexpat. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2025-66382?

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

Does CVE-2025-66382 have an EU (EUVD) identifier?

Yes. CVE-2025-66382 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-199862.

When was CVE-2025-66382 published?

CVE-2025-66382 was published on 2025-11-28 and last updated on 2026-06-17.

CVE-2025-66382

CVE-2025-66382 is a low-severity vulnerability in Libexpat Project Libexpat with a CVSS 3.x base score of 2.9. 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-407.

Key facts

Severity: Low (CVSS 3.x base score 2.9)
EPSS exploit prediction: 0% (11th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2025-199862
Weakness: CWE-407
Affected product: Libexpat Project Libexpat
Published: 2025-11-28
Last modified: 2026-06-17

Description

In libexpat through 2.7.3, a crafted file with an approximate size of 2 MiB can lead to dozens of seconds of processing time.

Frequently asked questions

What is CVE-2025-66382?: In libexpat through 2.7.3, a crafted file with an approximate size of 2 MiB can lead to dozens of seconds of processing time.
How severe is CVE-2025-66382?: CVE-2025-66382 has a CVSS 3.x base score of 2.9, rated low severity. It is exploitable over local access with high attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability low.
Is CVE-2025-66382 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (11th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2025-66382?: CVE-2025-66382 affects Libexpat Project Libexpat. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2025-66382?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2025-66382 have an EU (EUVD) identifier?: Yes. CVE-2025-66382 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-199862.
When was CVE-2025-66382 published?: CVE-2025-66382 was published on 2025-11-28 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:libexpat_project:libexpat:*:*:*:*:*:*:*:*

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