CVE-2025-66286

Exploitation

Assessed, none found. CISA's assessment recorded neither public exploit code nor evidence of exploitation when it was made.

SSVC decision

• ExploitationnoneCISA recorded no public exploit code and no evidence of exploitation.
• AutomatablenoAt least one step from reconnaissance to exploitation cannot be reliably automated.
• Technical ImpactpartialSuccessful exploitation gives limited control of the vulnerable component.

CISA publishes the decision points, not a final SSVC decision. The decision also depends on mission and well-being impact, which is a property of your deployment rather than of the vulnerability.

EPSS probability

0.23% probability of exploitation activity in the next 30 days.

EPSS percentile

Equal to or higher than the score of 14.0% of scored records. A rank, not a probability.

NVD base score

4.7 (CVSS v3.x), scored by the NVD independently of the CNA.

NVD CVSS vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:N/A:N

NVD analysis status

Awaiting Analysis. NVD last modified this record on 2026-10-14.

Red Hat severity

Moderate. Red Hat's rating for its own products, not a CVSS rating.

Exploit-prediction scores from FIRST. Independent scoring and analysis status from the NVD. Vendor severity from Red Hat. Exploitation assessment and catalog membership from CISA.

Published

2026-04-23 12:33Z6 MO AGO

Last updated

2026-04-28 20:00Z6 MO AGO

Reserved

2025-11-26

Assigning CNA

redhat

Record state

PUBLISHED

Severity

Medium (CVSS 4.7)

CNA CVSS vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:N/A:N

Weaknesses

• CWE-639Authorization Bypass Through User-Controlled KeyBase

Data version

5.2

Document digest

d655de082f21c1dcd6ac9efe5ae7dbd54b6bc62348de2de8751847da96f7af6b

• access.redhat.comhttps://access.redhat.com/security/cve/CVE-2025-66286vdb-entryx_refsource_REDHAT
• bugs.webkit.orghttps://bugs.webkit.org/show_bug.cgi?id=259787
• bugzilla.redhat.comRHBZ#2424652https://bugzilla.redhat.com/show_bug.cgi?id=2424652issue-trackingx_refsource_REDHAT