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CVE-2025-59375

Libexpat denial of service

7.5 HIGHPublic exploitEPSS 1.31%
  1. Published15 Sept 2025

Description

libexpat in Expat before 2.7.2 allows attackers to trigger large dynamic memory allocations via a small document that is submitted for parsing.

CVSS 3.1 breakdown

Attack vectorNetwork
Attack complexityLow
Privileges requiredNone
User interactionNone
ScopeUnchanged
ConfidentialityNone
IntegrityNone
AvailabilityHigh
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Affected products

Libexpat< 2.7.2

Remediation

Fixed in
Libexpat≥ 2.7.2

References

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Frequently asked

Is CVE-2025-59375 being actively exploited?

CVE-2025-59375 is not in the CISA KEV catalog. A public exploit reference exists, so treat it as exploitable. Its EPSS exploit probability is 1.31%.

How severe is CVE-2025-59375?

CVE-2025-59375 has a CVSS 3.1 base score of 7.5, rated high. EPSS estimates a 1.31% probability of exploitation.

Which products are affected by CVE-2025-59375?

Affected products include Libexpat.

How do I fix CVE-2025-59375?

Upgrade affected software to a fixed version, for example Libexpat 2.7.2 or later, then confirm no affected versions remain in your inventory.

How Secuno handles this

Secuno correlates vulnerabilities like CVE-2025-59375 against the real software inventory on every managed device, as each hourly inventory arrives. Rather than a static severity, each match is scored in context: exploit availability, EPSS, the asset's exposure, and business criticality decide where it lands in the queue. If an affected version is present anywhere across your portfolio, it surfaces automatically with a prioritised remediation path.

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Data from the NVD, CISA KEV catalog and FIRST EPSS. CVSS 3.1 base score shown where available.