CVE-2025-10585

Google Chromium V8: Type Confusion

As of , CVE-2025-10585 in Google Chromium V8 is on CISA's list of exploited vulnerabilities: CISA listed it on . Our patch-first group: Patch soon.

Exploited
Yes: CISA listed it on 23 September 2025
US federal deadline
14 October 202521 days after CISA listed it. US federal civilian agencies must fix it by then.
Used in ransomware campaigns
Not known to CISA
EPSS score
0.05Higher than 92% of the CVEs EPSS scores. EPSS estimates the chance of exploitation activity in the next 30 days.
Public exploit
None foundNeither Metasploit nor Exploit-DB lists one.
Fix
Vendor advice: chromereleases.googleblog.comLinks below, from CISA's entry.

What CISA says to do

Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.

CISA's required action

What the flaw is

Google Chromium contains a type confusion vulnerability in the V8 JavaScript and WebAssembly engine.

CISA's description

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)

The CVE record's description, from Chrome

CVE published
24 September 2025
Assigned by
Chrome
CVSS
8.8 High (CVSS 3.1, from CISA-ADP)
CWE-843
Access of Resource Using Incompatible Type ('Type Confusion')
CISA SSVC, exploitation
active
CISA SSVC, automatable
no
CISA SSVC, technical impact
total

Timeline

  1. CISA added it to its list of exploited vulnerabilities.
  2. The CVE record was published.
  3. The US federal deadline to fix it.

Chromium V8: other exploited entries

VulnerabilityProductOur groupListedDeadlineEPSS
CVE-2018-17463Remote Code ExecutionGoogle Chromium V8Patch this weekMetasploit module; EPSS 0.85; verified Exploit-DB entry0.85
CVE-2019-5825Out-of-Bounds WriteGoogle Chromium V8Patch this weekMetasploit module; EPSS 0.56; verified Exploit-DB entry0.56
CVE-2020-6418Type ConfusionGoogle Chromium V8Patch this weekMetasploit module; EPSS 0.79; verified Exploit-DB entry0.79
CVE-2021-21220Improper Input ValidationGoogle Chromium V8Patch this weekMetasploit module; EPSS 0.700.70
CVE-2018-6065Integer OverflowGoogle Chromium V8Patch this weekEPSS 0.60; verified Exploit-DB entry0.60
CVE-2021-21224Type ConfusionGoogle Chromium V8Patch this weekEPSS 0.840.84
CVE-2021-30551Type ConfusionGoogle Chromium V8Patch this weekEPSS 0.650.65
CVE-2021-30632Out-of-Bounds WriteGoogle Chromium V8Patch this weekEPSS 0.630.63
CVE-2026-85046Type ConfusionGoogle Chromium V8Patch soon0.49
CVE-2023-4762Type ConfusionGoogle Chromium V8Patch soon0.41

All 41 entries for Chromium V8

Read further