CVE-2021-37976 — Google Chrome Vulnerability

What is CVE-2021-37976?

Inappropriate implementation in Memory in Google Chrome prior to 94.0.4606.71 allowed a remote attacker to obtain potentially sensitive information from process memory via a crafted HTML page.

The record classifies CVE-2021-37976 under weakness class CWE-862. 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. 6 affected-product entries are recorded, across 3 vendors, listed below. The identifier was first published 1850 days ago.

Severity and exploitation probability

CVSS v3.1 base score: 6.5 — MEDIUM
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N
EPSS (FIRST): 19.9% probability of exploitation in the next 30 days, higher than 97.3% of all scored CVEs
CISA KEV: Listed since 2021-11-03, federal remediation deadline 2021-11-17
Threadlinqs priority: 9/10 — CISA KEV-listed, which Threadlinqs floors at 9
Published: 2021-10-08, last modified 2025-10-21

Is CVE-2021-37976 being exploited?

CISA added CVE-2021-37976 to the Known Exploited Vulnerabilities catalog on 2021-11-03, which means the agency holds evidence of exploitation in the wild; US federal civilian agencies had to remediate it by 2021-11-17 under BOD 22-01. Weaponised exploit code for CVE-2021-37976 is publicly available. 1 public proof-of-concept repository is tracked for this identifier. It currently carries a trending score of 47 in the Threadlinqs vulnerability feed.

trickest/cve (trickest)

Affected products and versions

Google: Chrome
Fedoraproject: Fedora 33, Fedora 34, Fedora 35
Debian: Linux 10.0, Linux 11.0

How to fix CVE-2021-37976

The record marks a vendor fix as available for CVE-2021-37976. Vendor advisory: https://chromereleases.googleblog.com/2021/09/stable-channel-update-for-desktop_30.html. Because CVE-2021-37976 is KEV-listed, US federal civilian agencies were required to apply the vendor fix, or stop using the product, by 2021-11-17. 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-2021-37976

1 tracked threat in the Threadlinqs corpus references CVE-2021-37976, 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

Enriched from CVE.org, FIRST EPSS, CISA KEV, GitHub Security Advisories, public proof-of-concept repositories. Last verified by Threadlinqs on 2026-10-10.

CVE-2021-37976 — Google Chrome