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Findings

CVE-2021-21193

Google Chromium Blink Use-After-Free Vulnerability

Published Mar 16, 2021 · updated Jun 16, 2026 · google chrome

Google Chromium Blink contains a use-after-free vulnerability that allows a remote attacker to potentially exploit heap corruption via a crafted HTML page. This vulnerability could affect multiple web browsers that utilize Chromium, including, but not limited to, Google Chrome, Microsoft Edge, and Opera.

Code

The project this record applies to. Exploit listings stay in References.

No public source repository is identified for this product.

Timeline

Detection, updates, and resolution for this record.

  1. Mar 16, 2021 · Catalog

    Detected

    Google Chromium Blink contains a use-after-free vulnerability that allows a remote attacker to potentially exploit heap corruption via a crafted HTML page. This vulnerability could affect multiple web browsers that utilize Chromium, including, but not limited to, Google Chrome, Microsoft Edge, and Opera.

  2. Nov 3, 2021 · CISA KEV

    Known exploited

    Apply updates per vendor instructions.

  3. Nov 17, 2021 · CISA KEV

    Remediation due

    Apply updates per vendor instructions.

  4. Jun 16, 2026 · Catalog

    Updated

    Google Chromium Blink contains a use-after-free vulnerability that allows a remote attacker to potentially exploit heap corruption via a crafted HTML page. This vulnerability could affect multiple web browsers that utilize Chromium, including, but not limited to, Google Chrome, Microsoft Edge, and Opera.

Required action

Apply updates per vendor instructions.

CISA due date Nov 17, 2021

Affected

  • cpe debian/debian linux10.0
  • cpe fedoraproject/fedora32
  • cpe google/chromeversion unspecified
  • vendor Google Chromium Blinkversion unspecified

Sources

  • CISA KEVConfirmed exploitationCVE-2021-21193

    Google Chromium Blink contains a use-after-free vulnerability that allows a remote attacker to potentially exploit heap corruption via a crafted HTML page. This vulnerability could affect multiple web browsers that utilize Chromium, including, but not limited to, Google Chrome, Microsoft Edge, and Opera.

    cisa.gov
  • CVE.orgVulnerability recordCVE-2021-21193

    Official CVE identifier

    cve.org
  • FIRST EPSSExploitation probabilityCVE-2021-21193

    30-day exploitation probability 9.9%

    first.org
  • NIST NVDVulnerability recordCVE-2021-21193

    Use after free in Blink in Google Chrome prior to 89.0.4389.90 allowed a remote attacker to potentially exploit heap corruption via a crafted HTML page.

    nvd.nist.gov

References