ClosedPatched

Google Chromium V8: Chromium V8 Type Confusion Vulnerability

Google Chromium V8

Google Chromium V8 contains a type confusion vulnerability that could allow a remote attacker to perform arbitrary read/write via a crafted HTML page. This vulnerability could affect multiple web browsers that utilize Chromium, including, but not limited to, Google Chrome, Microsoft Edge, and Opera. Added to CISA KEV on 2025-07-02.

Why this severity: CVSS 8.1 (CISA ADP, v3.1); actively exploited (CISA KEV)

Started: Jul 2, 2025
Closed: Jul 2, 2025
CVE: CVE-2025-6554

Follow this incident

Updated Jul 2, 2025

Affected

See vendor advisory / CISA notes (versions not always listed in KEV feed)

Fixed in

See vendor advisory linked in sources

Timeline1

Jul 2, 2025
CISA added CVE-2025-6554 to the KEV catalog (due 2025-07-23).

Advisories3

Notes & caveats

Derived from CISA KEV JSON feed catalogVersion 2026.10.21. CVSS from the CVE record (cvelistV5). Exact affected/fixed version strings are not always in the KEV record; verify against the vendor advisory URL. startedAt uses dateAdded (exploitation may have begun earlier; many entries are older CVEs newly confirmed as exploited in 2025).

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