CVE-2021-21220

high-risk

Published 2021-04-26

Insufficient validation of untrusted input in V8 in Google Chrome prior to 89.0.4389.128 allowed a remote attacker to potentially exploit heap corruption via a crafted HTML page.

Do I need to act?

92.6% chance of exploitation in next 30 days

EPSS score — higher than 7% of all CVEs

CISA KEV: actively exploited in the wild

On the Known Exploited Vulnerabilities catalog — federal agencies must patch

Patch status unknown

Check vendor advisories for fix availability and mitigation guidance

CVSS 8.8/10 High

NETWORK / LOW complexity

Affected Products (4)

Chrome

Fedora

Affected Vendors

Google Fedoraproject

References (17)

Exploit http://packetstormsecurity.com/files/162437/Google-Chrome-XOR-Typer-Out-Of-Bound...

Third Party Advisory http://packetstormsecurity.com/files/176210/Chrome-V8-JIT-XOR-Arbitrary-Code-Exe...

Release Notes https://chromereleases.googleblog.com/2021/04/stable-channel-update-for-desktop....

Exploit https://crbug.com/1196683

Release Notes https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedorapro...

Third Party Advisory https://security.gentoo.org/glsa/202104-08

Exploit http://packetstormsecurity.com/files/162437/Google-Chrome-XOR-Typer-Out-Of-Bound...

Third Party Advisory http://packetstormsecurity.com/files/176210/Chrome-V8-JIT-XOR-Arbitrary-Code-Exe...

Release Notes https://chromereleases.googleblog.com/2021/04/stable-channel-update-for-desktop....

Exploit https://crbug.com/1196683

Release Notes https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedorapro...

Third Party Advisory https://security.gentoo.org/glsa/202104-08

US Government Resource https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2021-...

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high-risk

Severity 30/34 · Critical

Exploitability 27/34 · High

Exposure 10/34 · Low