HIGH CISA KEV Actively Exploited

CVE-2025-6558

chromium-browser: Chromium insufficient validation

CVSS v3

8.8

HIGH

EPSS Score

9.6 %

exploit probability, as of 2026-10-04

CISA KEV

Yes

known exploited

Exploitation

active

SSVC status

Description

Insufficient validation of untrusted input in ANGLE and GPU in Google Chrome prior to 138.0.7204.157 allowed a remote attacker to potentially perform a sandbox escape via a crafted HTML page. (Chromium security severity: High)

CISA Known Exploited Vulnerability

Date Added: 2025-07-22
Patch Due Date: 2025-08-12
Ransomware Use: Unknown

Technical details

CVSS v3 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Published: 2025-07-15
Last Modified: 2026-10-01

Frequently asked questions

What is CVE-2025-6558?

Is CVE-2025-6558 actively exploited?

Yes. CVE-2025-6558 is on the CISA Known Exploited Vulnerabilities (KEV) catalog, meaning it has been confirmed as actively exploited in the wild. CISA requires federal agencies to patch by 2025-08-12.

What is the CVSS score for CVE-2025-6558?

CVE-2025-6558 has a CVSS v3 base score of 8.8 (HIGH severity), with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H.

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