Assessment
Why it matters
CISA lists this vulnerability as known to be exploited; exploitation is confirmed; EPSS is 5.4%; technical severity is CVSS 9.8.
Type confusion in V8 in Google Chrome prior to 140.0.7339.185 allowed a remote attacker to potentially exploit heap corruption via a crafted HTML page. (Chromium security severity: High)
Who should care
- Teams operating Chrome, Chromium V8, Cadra
- Vulnerability and exposure management teams
- Security operations teams monitoring exploitation activity
Response plan
What I would do
- Confirm whether Chrome, Chromium V8, Cadra is present in the environment.
- Identify affected versions and establish whether vulnerable services are exposed or reachable.
- Chromium Security advisory 445380761
- Review relevant security telemetry for evidence of attempted or successful exploitation.
- Document the remediation decision and track it to verified completion.
Treatment intelligence
Remediation intelligence
Vendor sources are listed before government and third-party guidance. Confirm product applicability and change prerequisites before deployment.
Verification noteAutomated link verification has not completed for this guidance yet.
Technical details
- CVSS vector
- CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- CWE
- CWE-843
- Affected versions
- Google Chrome (End Excluding 140.0.7339.185); Google Chromium V8; Siemens Cadra (Version -)
- Fixed versions
- Google Chrome (Fixed from 140.0.7339.185)
- Published
- 24 September 2025
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
Signal timeline
- CVE published
- Added to CISA KEV
- Latest EPSS score: 5.4%
- Signal calculated at 70