How to check if you are exposed to CVE-2025-6558
- Find every Google Chromium system you or your clients run, including ones exposed to the internet. Those come first: CISA only lists flaws attackers are already using.
- Compare each version with the fixed versions in the vendor advisory below. Where no fix exists yet, apply the vendor’s mitigation or take the system off the internet.
- Run a credentialed vulnerability scan to catch the systems you missed, then check that the next scan no longer reports CVE-2025-6558.
US federal agencies had to fix this by 2025-08-12. Everyone else should treat that deadline as a guide: if it has passed, this is overdue.
Affected versions
Versions the National Vulnerability Database lists as vulnerable to CVE-2025-6558. Check the vendor advisory for the exact fixed builds before you sign anything off.
| Product | Vulnerable versions |
|---|---|
| Google Chrome | before 138.0.7204.157 |
| Debian Linux | 11.0 |
| Apple Safari | before 18.6 |
| Apple Ipados | before 18.6 |
| Apple Iphone OS | before 18.6 |
| Apple Macos | before 15.6 |
NVD lists 4 more affected products; see the full record on NVD.
Timeline
- · Published in the National Vulnerability Database
- · Added to CISA's Known Exploited Vulnerabilities catalog, 7 days after it was published
- · Fix-by date for US federal agencies, passed 446 days ago
Vendor advisories and fixes
Weakness type
More exploited Google vulnerabilities
CISA lists 76 exploited Google vulnerabilities. The closest matches:
- CVE-2026-2441Google Chromium CSS Use-After-Free VulnerabilityAdded 2026-02-17
- CVE-2025-14174Google Chromium Out of Bounds Memory Access VulnerabilityAdded 2025-12-12
- CVE-2024-4671Google Chromium Visuals Use-After-Free VulnerabilityAdded 2024-05-13
- CVE-2021-37976Google Chromium Information Disclosure VulnerabilityAdded 2021-11-03
- CVE-2021-21166Google Chromium Race Condition VulnerabilityAdded 2021-11-03
- CVE-2026-111497Google Brotli Unchecked Return Value VulnerabilityAdded 2026-10-27
- CVE-2026-58704Google Pixel Improper Authorization VulnerabilityAdded 2026-09-16
- CVE-2026-87491Google Chromium V8 Out of Bounds Write VulnerabilityAdded 2026-09-09
Keep going
Sources: CISA Known Exploited Vulnerabilities catalog (version 2026.10.30); EPSS data from FIRST.org; CVSS and descriptions from the NIST National Vulnerability Database. Checked 2026-11-01. This product uses the NVD API but is not endorsed or certified by the NVD.
