How severe is CVE-2025-66287?

CVE-2025-66287 has a CVSS 3.x base score of 8.8, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2025-66287 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (32nd percentile), an estimate of the probability of exploitation in the next 30 days.

How do I fix CVE-2025-66287?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

Does CVE-2025-66287 have an EU (EUVD) identifier?

Yes. CVE-2025-66287 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-201244.

When was CVE-2025-66287 published?

CVE-2025-66287 was published on 2025-12-04 and last updated on 2026-06-29.

CVE-2025-66287

CVE-2025-66287 is a high-severity vulnerability with a CVSS 3.x base score of 8.8. 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-120.

Key facts

Severity: High (CVSS 3.x base score 8.8)
EPSS exploit prediction: 0% (32nd percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2025-201244
Weakness: CWE-120
Published: 2025-12-04
Last modified: 2026-06-29

Description

A flaw was found in WebKitGTK. Processing malicious web content can cause an unexpected process crash due to improper memory handling.

Frequently asked questions

What is CVE-2025-66287?: A flaw was found in WebKitGTK. Processing malicious web content can cause an unexpected process crash due to improper memory handling.
How severe is CVE-2025-66287?: CVE-2025-66287 has a CVSS 3.x base score of 8.8, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2025-66287 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (32nd percentile), an estimate of the probability of exploitation in the next 30 days.
How do I fix CVE-2025-66287?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
Does CVE-2025-66287 have an EU (EUVD) identifier?: Yes. CVE-2025-66287 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-201244.
When was CVE-2025-66287 published?: CVE-2025-66287 was published on 2025-12-04 and last updated on 2026-06-29.

References

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