SARA / Free Tools / KEV / CVE-2021-21206

CVE-2021-21206 on CISA KEV

Use after free in Blink in Google Chrome prior to 89.0.4389.128 allowed a remote attacker to potentially exploit heap corruption via a crafted HTML page.

CISA KEV — Actively Exploited

Google Chromium Blink Use-After-Free Vulnerability

Vendor / Product
— / Google / Chromium Blink
Added to KEV
2021-11-03
BOD 22-01 due
2021-11-17
Ransomware use
Unknown
CVSS / EPSS
— — · EPSS 21.91%

01What CISA says about this vulnerability

Use after free in Blink in Google Chrome prior to 89.0.4389.128 allowed a remote attacker to potentially exploit heap corruption via a crafted HTML page.

02Required action — verbatim from CISA

Apply updates per vendor instructions.

03Notes & references

04SARA's analyst layer — why this matters

This vulnerability is currently on the CISA KEV list, which CISA only adds CVEs to when there is reliable evidence of active exploitation in the wild. For federal civilian agencies, BOD 22-01 requires remediation by the due date above. For everyone else, KEV is the strongest "patch immediately" signal you can get from public threat intel.

05Affected products (summary)

VendorProductVersions
GoogleChromeunspecified

06Detection

Open the Sigma generator with a pre-filled prompt for this CVE to draft a starting detection:

Open in Sigma generator →

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