What is CVE-2025-6554?

CVE-2025-6554 is a high-severity vulnerability in Apple macOS, classified under Access of Resource Using Incompatible Type (Type Confusion). CVSS score: 8.1/10. Published 2025-06-30.

How severe is CVE-2025-6554?

High severity. CVSS v3 base score is 8.1 out of 10.

Is CVE-2025-6554 known to be exploited?

Yes. CVE-2025-6554 is listed in the CISA Known Exploited Vulnerabilities catalog (added 2025-07-02), indicating it is being actively exploited. 23 public proof-of-concept repositories are indexed.

Vulnerability in Apple macOS

CVE-2025-6554

Type confusion in V8 in Google Chrome prior to 138.0.7204.96 allowed a remote attacker to perform arbitrary read/write via a crafted HTML page. (Chromium security severity: High)

Published 2025-06-30 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 8.1 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:N.

EPSS exploit prediction

EPSS: 0.141 (96.5th percentile), scored 2026-10-18.

Moderate probability of exploitation in the next 30 days — watch for active exploitation reports. 97th percentile — 96.5% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.127 · newest: 0.141 · change: +0.014

Affected products

Weakness classification (CWE)

CWE-843 — Access of Resource Using Incompatible Type (Type Confusion)

CISA KEV (Known Exploited Vulnerabilities)

This CVE is on the CISA KEV catalog, added on 2025-07-02. CISA KEV inclusion means CISA has confirmed in-the-wild exploitation; US federal agencies are required to remediate within a published due date.

BOD 22-01 due date: 2025-07-23.

Required action: Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.

Public proof-of-concept exploits

References

chromereleases.googleblog.com/2025/06/stable-channel-update-for-desktop_30.html (Vendor Advisory)
issues.chromium.org/issues/427663123 (Permissions Required)
134c704f-9b21-4f2e-91b3-4a467353bcc0 (US Government Resource)

Frequently asked questions

What is CVE-2025-6554?: CVE-2025-6554 is a high-severity vulnerability in Apple macOS, classified under Access of Resource Using Incompatible Type (Type Confusion). CVSS score: 8.1/10. Published 2025-06-30.
How severe is CVE-2025-6554?: High severity. CVSS v3 base score is 8.1 out of 10.
Is CVE-2025-6554 known to be exploited?: Yes. CVE-2025-6554 is listed in the CISA Known Exploited Vulnerabilities catalog (added 2025-07-02), indicating it is being actively exploited. 23 public proof-of-concept repositories are indexed.