What is CVE-2021-37986?

CVE-2021-37986 is a high-severity vulnerability in Google Chrome, classified under Out-of-bounds Write. CVSS score: 8.8/10. Published 2021-11-02.

How severe is CVE-2021-37986?

High severity. CVSS v3 base score is 8.8 out of 10.

Buffer overflow in Google Chrome

CVE-2021-37986

Heap buffer overflow in Settings in Google Chrome prior to 95.0.4638.54 allowed a remote attacker to engage with Dev Tools to potentially exploit heap corruption via a crafted HTML page.

Vulnerability class: Buffer Overflow

Published 2021-11-02 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 8.8 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.010 (60.0th percentile), scored 2026-10-07.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 60th percentile — 60.0% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.010 · newest: 0.010 · change: 0.000

Affected products

Google Chrome — versions unspecified
Debian Linux — versions 10.0, 11.0

Weakness classification (CWE)

CWE-787 — Out-of-bounds Write

References

chromereleases.googleblog.com/2021/10/stable-channel-update-for-desktop_19.html (Vendor Advisory)
crbug.com/1242404 (Permissions Required, Vendor Advisory)
www.debian.org/security/2022/dsa-5046 (vendor-advisory, Third Party Advisory)

Frequently asked questions

What is CVE-2021-37986?: CVE-2021-37986 is a high-severity vulnerability in Google Chrome, classified under Out-of-bounds Write. CVSS score: 8.8/10. Published 2021-11-02.
How severe is CVE-2021-37986?: High severity. CVSS v3 base score is 8.8 out of 10.