CVE-2025-6554: Google Chromium V8 exploited

Advisory generated from the CVE record, CISA, Exploit Observer and VEDAS: what it is, whether it is exploited, who is affected, and how to fix and detect it.

What it is

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)

Description quoted from the CVE record (assigned by Chrome, published 2025-06-30).

Weakness: Type Confusion

How it can be exploited

Exploitable over the network with low attack complexity needing no privileges and a user must take an action. Impact: confidentiality high, integrity high, availability none. CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:N

CISA assessment (SSVC): CISA assesses exploitation as active. Automatable: no. Technical impact: total.

On CISA KEV since: 2025-07-02
US federal deadline: 2025-07-23
Ransomware use: Not known

Public exploit evidence (Exploit Observer)

Also known as: BDU:2025-07783, CNNVD-202506-3794, CNVD-2025-14800, EUVD-2025-19675, GHSA-mj9c-f5v6-7665, SNYK-DEBIAN11-CHROMIUM-10574946, SNYK-UNMANAGED-CHROMIUM-10582122

VEDAS cluster: VEDAS:DREAMVOYAGE

Exploit Observer links 12 pieces of public exploit code or detection modules that name this CVE or one of its aliases.

Exploit code and modules (12)

Code that names this CVE. A repository can be a working exploit, a scanner, a fake or malware; read it before running anything.

Code repository: https://github.com/9insomnie/cve-2025-6554
Code repository: https://github.com/aklnjakln/cve-2025-6554
Code repository: https://github.com/ghostn4444/cve-2025-6554poc
Code repository: https://github.com/ghostn4444/poc-cve-2025-6554
Code repository: https://github.com/gmh5225/cve-2025-6554
Code repository: https://github.com/gmh5225/cve-2025-6554-2
Code repository: https://github.com/jopraveen/cve-2025-6554
Code repository: https://github.com/juccoblak/cve-2025-6554
Code repository: https://github.com/lordbheem/cve-2025-6554
Code repository: https://github.com/pwntoday/cve-2025-6554
Code repository: https://github.com/rbaicba/cve-2025-6554
Code repository: https://github.com/windz3r0day/cve-2025-6554

Research and write-ups (2)

Research or write-up: https://ti.qianxin.com/blog/articles/a-brief-analysis-of-chrome-0day-cve-2025-6554-en
Research or write-up: https://vulmon.com/vulnerabilitydetails?qid=CVE-2025-6554

Vulnerability databases and vendor advisories (14)

Catalogue entries, not exploit evidence.

Vulnerability database or vendor advisory: https://euvd.enisa.europa.eu/enisa/EUVD-2025-19675
Vulnerability database or vendor advisory: https://github.com/advisories/GHSA-mj9c-f5v6-7665
Vulnerability database or vendor advisory: https://nvd.nist.gov/vuln/detail/CVE-2025-6554
Vulnerability database or vendor advisory: https://osv.dev/vulnerability/CVE-2025-6554
Vulnerability database or vendor advisory: https://osv.dev/vulnerability/CVE-2025-6554
Vulnerability database or vendor advisory: https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2025-6554
Vulnerability database or vendor advisory: https://security-tracker.debian.org/tracker/CVE-2025-6554
Vulnerability database or vendor advisory: https://security.snyk.io/vuln/SNYK-DEBIAN11-CHROMIUM-10574946
Vulnerability database or vendor advisory: https://security.snyk.io/vuln/SNYK-UNMANAGED-CHROMIUM-10582122
Vulnerability database or vendor advisory: https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2025-6554
Vulnerability database or vendor advisory: https://www.cnnvd.org.cn/home/globalSearch?keyword=CNNVD-202506-3794
Vulnerability database or vendor advisory: https://www.cnvd.org.cn/flaw/show/CNVD-2025-14800
and 2 more

News (1)

News: https://securityaffairs.com/180001/hacking/cve-2025-6554-marks-the-fifth-actively-exploited-chrome-zero-day-patched-by-google-in-2025.html

298 more references returned by Exploit Observer did not name this CVE or an alias, so they are left out.

VEDAS data as of 2026-11-01T17:12 UTC; fetched 2026-11-02.

Live scores

EPSS: 0.141
likely to be attacked soon
VEDAS: 0.982
strong exploit evidence
On CISA KEV: Yes, since 2025-07-02
Detection rule: None yet

EPSS (chance of attack)

VEDAS (exploit evidence)

Thin horizontal line: the “likely” (EPSS 0.10) or “strong” (VEDAS 0.90) threshold. Shaded “no data” areas are periods when cve-scores did not publish.

Who is affected

Product	Affected	Not affected
Google Chrome	from 138.0.7204.96 before 138.0.7204.96	Not stated

Version ranges exactly as the CVE record states them. “Before X” means X is the first fixed version.

Exploit Observer also maps it to: google chrome, google_inc google_chrome, ао_«нтц_ит_роса» роса_хром, ооо_«ред_софт» ред_ос.

How to fix it

Fixed versions stated in the CVE record: 138.0.7204.96.

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

Vendor guidance:

How to detect it

There is no open VEDAS detection rule for this bug yet. It is listed on the detection gaps page if CISA has confirmed attacks.

Advisories on this CVE

Chrome 2025 in-the-wild zero-days (March 2025)

References

Government sources

https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2025-6554 (government-resource)

Other references

Other databases

Where this comes from

This advisory is generated automatically by VEDAS from: CVE.org record, CISA KEV, cve-scores (EPSS and VEDAS), Exploit Observer. Text in quotes is reproduced from the source; everything else is a fixed template filled with source fields. Nothing here is written by a language model. Check the vendor advisory before acting, and read how VEDAS and Exploit Observer work, and their limits.

CVE-2025-6554: Google Chromium V8 Type Confusion Vulnerability