Threat Intelligence / CVE / CVE-2025-6554

CVE-2025-6554 — Google Chrome

CISA KEV

CVSS v3.1 8.1 (HIGH) · EPSS 0.9% (higher than 76.2% of all scored CVEs) · Priority 9/10 · Published 2025-06-30

As of 2025-10-24, CVE-2025-6554 is a HIGH-severity vulnerability in Google Chrome, CVSS v3.1 8.1, EPSS 0.9% (76.2th percentile). It is listed in the CISA Known Exploited Vulnerabilities catalog (added 2025-07-02), with a US federal remediation deadline of 2025-07-23. Threadlinqs Intelligence links 1 tracked threat campaign to CVE-2025-6554, most recently “Hack-for-Hire Espionage Campaign Targeting MENA Civil Society via Predator/Intellexa Mercenary Spyware”.

Last updated: 2025-10-24

What is CVE-2025-6554?

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 record classifies CVE-2025-6554 under weakness class CWE-843. Its CVSS v3 base vector states that the flaw is reachable remotely over the network, needs no prior authentication, needs a user to take an action first, and has high impact on confidentiality, integrity. 4 affected-product entries are recorded, across 4 vendors, listed below. The identifier was first published 440 days ago.

Severity and exploitation probability

CVSS v3.1 base score: 8.1 — HIGH
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:N
EPSS (FIRST): 0.9% probability of exploitation in the next 30 days, higher than 76.2% of all scored CVEs
CISA KEV: Listed since 2025-07-02, federal remediation deadline 2025-07-23
Threadlinqs priority: 9/10 — CISA KEV-listed, which Threadlinqs floors at 9
Published: 2025-06-30, last modified 2025-10-24

Is CVE-2025-6554 being exploited?

CISA added CVE-2025-6554 to the Known Exploited Vulnerabilities catalog on 2025-07-02, which means the agency holds evidence of exploitation in the wild; US federal civilian agencies had to remediate it by 2025-07-23 under BOD 22-01. It currently carries a trending score of 34 in the Threadlinqs vulnerability feed.

Affected products and versions

Google: Chrome
Microsoft: Windows
Apple: Macos
Linux: Kernel

How to fix CVE-2025-6554

The record marks a vendor fix as available for CVE-2025-6554. Patch reference: https://chromereleases.googleblog.com/2025/08/stable-channel-update-for-desktop-138.html. Vendor advisory: https://chromereleases.googleblog.com/2025/06/stable-channel-update-for-desktop_30.html. Because CVE-2025-6554 is KEV-listed, US federal civilian agencies were required to apply the vendor fix, or stop using the product, by 2025-07-23. Apply the vendor fix referenced above to every affected product listed in this record, then confirm the running version against the vendor advisory.

Threat activity tracking CVE-2025-6554

1 tracked threat in the Threadlinqs corpus references CVE-2025-6554, either in the campaign’s CVE list or as an indicator on the campaign record.

Hack-for-Hire Espionage Campaign Targeting MENA Civil Society via Predator/Intellexa Mercenary Spyware — HIGH · 2026-04-08

Sources

Seeded from nvd and not yet processed by the Threadlinqs enrichment pipeline, so blank CVSS, EPSS or KEV fields above mean NOT MEASURED rather than measured-absent.

Full detection coverage & IOCs for threats exploiting CVE-2025-6554 are available via the Threadlinqs MCP server (Purple tier). View plans →

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