CVE-2025-10585
Published: 24 September 2025
Summary
CVE-2025-10585 is a critical-severity Type Confusion (CWE-843) vulnerability in Google Chrome. Its CVSS base score is 9.8 (Critical).
Operationally, exploitation aligns with the MITRE ATT&CK technique Drive-by Compromise (T1189); ranked in the top 15.5% of CVEs by exploit likelihood; CISA has added it to the Known Exploited Vulnerabilities catalog.
The strongest mitigations our analysis identified are NIST 800-53 SI-2 (Flaw Remediation) and RA-5 (Vulnerability Monitoring and Scanning).
Deeper analysis
CVE-2025-10585 is a type confusion vulnerability (CWE-843) in the V8 JavaScript engine within Google Chrome versions prior to 140.0.7339.185. The flaw permits heap corruption when a victim visits a specially crafted HTML page, carrying a CVSS 3.1 base score of 9.8 reflecting network-exploitable impact on confidentiality, integrity, and availability without requiring authentication or user interaction beyond page rendering.
A remote attacker can deliver the malicious page through any web vector and leverage the resulting memory corruption to execute arbitrary code or cause denial of service in the browser process. Because the vulnerability resides in the core scripting engine, successful exploitation grants the attacker the full privileges of the Chrome renderer or, under certain sandbox escapes, broader system access.
Chrome stable channel updates released on 17 September 2025 address the issue by advancing the V8 component to version 140.0.7339.185. The vulnerability appears in CISA’s Known Exploited Vulnerabilities catalog, confirming observed in-the-wild exploitation and prompting federal agencies to apply mitigations within prescribed timelines.
EPSS remains flat at 0.0213 with no material increase since disclosure, indicating that while real-world use has been confirmed, broad automated exploitation interest has not yet surged.
EU & UK References
- 🇪🇺 ENISA EUVD: EUVD-2025-31006
Vulnerability details
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)
- CWE(s)
- KEV Date Added
- 23 September 2025
Related Threats
MITRE ATT&CK Enterprise TechniquesAI
Why these techniques?
Direct RCE via crafted HTML/JS page loaded in browser enables drive-by compromise and client-side exploitation.
CVEs Like This One
Affected Assets
Mitigating Controls
Mitigating Controls (NIST 800-53 r5) AI
Directly addresses the CVE by requiring timely identification, reporting, and patching of the V8 type confusion vulnerability in Chrome to version 140.0.7339.185 or later.
Enables detection of systems running vulnerable Chrome versions through continuous vulnerability scanning, facilitating targeted remediation.
Implements memory safeguards such as address space layout randomization and data execution prevention to hinder exploitation of heap corruption from the type confusion flaw.