What is CVE-2025-1566?

CVE-2025-1566 is a high-severity vulnerability in Google Chrome OS, classified under CWE-1319. CVSS score: 7.5/10. Published 2025-04-16.

How severe is CVE-2025-1566?

High severity. CVSS v3 base score is 7.5 out of 10.

Vulnerability in Google Chrome OS

CVE-2025-1566

DNS Leak in Native System VPN in Google ChromeOS Dev Channel on ChromeOS 16002.23.0 allows network observers to expose plaintext DNS queries via failure to properly tunnel DNS traffic during VPN state transitions.

Published 2025-04-16 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.

EPSS exploit prediction

EPSS: 0.002 (8.2th percentile), scored 2026-10-04.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 8th percentile — 8.2% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.002 · newest: 0.002 · change: +0.000

Affected products

Google Chrome OS — versions 16002.23.0
Google Chromeos — versions 16002.23.0

Weakness classification (CWE)

CWE-1319

References

7f6e188d-c52a-4a19-8674-3c3fa7d1fc7f (Mailing List, Issue Tracking)
7f6e188d-c52a-4a19-8674-3c3fa7d1fc7f (Broken Link)

Frequently asked questions

What is CVE-2025-1566?: CVE-2025-1566 is a high-severity vulnerability in Google Chrome OS, classified under CWE-1319. CVSS score: 7.5/10. Published 2025-04-16.
How severe is CVE-2025-1566?: High severity. CVSS v3 base score is 7.5 out of 10.