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Vulnerability record · CVE-2021-21128 · published 9 February 2021

CVE-2021-21128: Google chrome out-of-bounds write vulnerability

Google · Chrome

Heap buffer overflow in Blink in Google Chrome prior to 88.0.4324.96 allowed a remote attacker to potentially exploit heap corruption via a crafted HTML page.

8.8 CVSS 3.1 High EPSS 6.5% · top 6.5% CWE-787 · Out-of-bounds write
8.8CVSS 3.1 base score, v2 6.8
6.5%EPSS exploitation probability, 30 days
NoNot in CISA KEV
2Affected product versions listed by NVD
6References, 2 tagged exploit
17 Jun 2026Last modified by NVD

Description

Heap buffer overflow in Blink in Google Chrome prior to 88.0.4324.96 allowed a remote attacker to potentially exploit heap corruption via a crafted HTML page.

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

Affected products

2 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://chromereleases.googleblog.com/2021/01/stable-channel-update-for-desktop_19.html Release NotesVendor Advisory
https://crbug.com/1138877 ExploitIssue TrackingPatchVendor Advisory
https://msrc.microsoft.com/update-guide/en-US/vulnerability/CVE-2021-21128 Third Party Advisory
https://chromereleases.googleblog.com/2021/01/stable-channel-update-for-desktop_19.html Release NotesVendor Advisory
https://crbug.com/1138877 ExploitIssue TrackingPatchVendor Advisory
https://msrc.microsoft.com/update-guide/en-US/vulnerability/CVE-2021-21128 Third Party Advisory

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

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Source: NIST National Vulnerability Database (record CVE-2021-21128), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.