CVE-2025-6554

Google Chromium V8: Type Confusion

As of , CVE-2025-6554 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 2 July 2025
US federal deadline
23 July 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
0.14Higher than 96% 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 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.

CISA's description

Type confusion in V8 in Google Chrome prior to 138.0.7204.96 allowed a remote attacker to perform arbitrary read/write via a crafted HTML page. (Chromium security severity: High)

The CVE record's description, from Chrome

CVE published
30 June 2025
Assigned by
Chrome
CVSS
8.1 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. The CVE record was published.
  2. CISA added it to its list of exploited vulnerabilities.
  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

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