CVE-2025-6554: Google Chromium V8 Type Confusion Vulnerability
Actively exploited. At least one CVE in this advisory is listed in the CISA Known Exploited Vulnerabilities catalog — exploitation has been observed in the wild. Treat remediation as urgent.
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.
CSIRTS triage
- What
- Google Chromium V8 contains a type confusion vulnerability that could allow a remote attacker to perform arbitrary read/write via a crafted HTML page.
- Who is affected
- Users of web browsers utilizing Chromium, including Google Chrome and Microsoft Edge, are affected.
- Urgency
- This vulnerability is critical and has been exploited, necessitating prompt action.
- Action
- Update to the latest version of Chromium or affected browsers to mitigate this issue.
AI-assisted analysis generated from the source advisory — verify against the original.
⚡ Watch Chromium V8
Get an email when a new Chromium V8 advisory drops — max one per day, one-click unsubscribe.
Details
Original advisory: https://nvd.nist.gov/vuln/detail/CVE-2025-6554
Exploitation outlook
EPSS (FIRST.org) estimates each CVE’s probability of exploitation in the next 30 days — here is the CSIRTS.com read on those numbers.
- Exploitation confirmedCVE-2025-6554Already exploited in the wild (CISA KEV) — the prediction phase is over. Patch now. Riskier than 96% of all EPSS-scored CVEs.
Referenced CVEs
| CVE | CSIRTS overview | External |
|---|---|---|
| CVE-2025-6554 | coverage & exploitation status | NVD · CVE.org |
Same CVEs, other sources
How other CERTs, PSIRTs and databases cover the vulnerabilities in this advisory.
- highexploited[UPDATE] [high] Google Chrome / Microsoft Edge: Vulnerability enables code executioncert-bund
- highexploited[UPDATE] [high] Google Chrome and Microsoft Edge: Multiple Vulnerabilities enable code executioncert-bund
- highexploited[UPDATE] [high] Google Chrome and Microsoft Edge: Multiple Vulnerabilitiescert-bund
Recent advisories for Google Chromium
A cluster of recent advisories against the same product widens the attack surface — attackers routinely chain freshly published CVEs on one product, so review these together.
- mediumCVE-2026-84356: UI misrepresentation in FullScreen in Google Chrome prior to 152.0.7977.75 allowed a remote at…nvd · 2026-09-02
- mediumCVE-2026-84348: Information leak in MediaCapture in Google Chrome prior to 152.0.7977.75 allowed a remote atta…nvd · 2026-09-02
- highCVE-2026-84347: Use after free in WebRTC in Google Chrome prior to 152.0.7977.75 allowed a remote attacker to …nvd · 2026-09-02
- mediumCVE-2026-84332: Incorrect authorization in SiteSettings in Google Chrome prior to 152.0.7977.75 allowed a remo…nvd · 2026-09-02
- mediumCVE-2026-84330: UI misrepresentation in FullScreen in Google Chrome on on Android prior to 152.0.7977.75 allow…nvd · 2026-09-02
- highCVE-2026-84326: Uninitialized resource in V8 in Google Chrome prior to 152.0.7977.75 allowed a remote attacker…nvd · 2026-09-02
More from CISA Known Exploited Vulnerabilities
- criticalCVE-2026-82329: JFrog Artifactory Improper Authentication Vulnerability2026-09-02
- criticalCVE-2026-49869: Kestra OSS OS Command Injection Vulnerability2026-09-02
- criticalCVE-2026-59822: BerriAI LiteLLM Improper Authentication Vulnerability2026-09-02
- criticalCVE-2026-9586: Sangoma Switchvox SQL Injection Vulnerability2026-09-02
- criticalCVE-2026-83548: SonicWall SMA1000 Appliances Server-Side Request Forgery Vulnerability2026-09-02