# CVE-2021-30551

Type confusion in V8 in Google Chrome prior to 91.0.4472.101 allowed a remote attacker to potentially exploit heap corruption via a crafted HTML page.

- Page: https://www.vulneraibility.com/cve/CVE-2021-30551
- CVSS: 8.8
- Known exploited: yes, in CISA KEV since 2021-11-03; CISA due date 2021-11-17
- EPSS: 64.70% (percentile 99.3)
- Unvetted proof-of-concept code on GitHub: 1 GitHub proof of concept (first 2021-08-22)
- CISA SSVC: exploitation active, automatable no, technical impact total (assessed 2025-01-29)
- Weakness: CWE-843
- Published: 2021-06-15

## Affected versions

- Google Chrome: affected < 91.0.4472.101

A version outside these ranges is not a statement that it is unaffected.

## References

- [other] https://chromereleases.googleblog.com/2021/06/stable-channel-update-for-desktop.html
- [other] https://crbug.com/1216437
- [advisory] https://security.gentoo.org/glsa/202107-06
- [advisory] https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/PAT6EOXVQFE6JFMFQF4IKAOUQSHMHL54/
- [advisory] https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/ETMZL6IHCTCTREEL434BQ4THQ7EOHJ43/
- [advisory] https://security.gentoo.org/glsa/202208-25
- [other] https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2021-30551

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Summary, impact and action are written by the vulneraibility.com AI analysis pipeline from the CVE record, NVD, CISA and FIRST data; verify against the references.