CVE-2021-21229

Exploitation

Not assessed. CISA has not published an exploitation assessment for this record, and it is not in the KEV catalog. That is an absence of assessment, not a finding of no risk.

SSVC decision

Not assessed by CISA

EPSS probability

0.85% probability of exploitation activity in the next 30 days.

EPSS percentile

Ranks above 55.5% of scored records. A rank, not a probability.

NVD base score

6.5 (CVSS v3.x), scored by the NVD independently of the CNA.

NVD CVSS vector

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

NVD analysis status

Modified. NVD last modified this record on 2026-06-17.

Red Hat severity

No Red Hat rating. Red Hat rates the CVEs that affect its products.

Exploit-prediction scores from FIRST. Independent scoring and analysis status from the NVD. Vendor severity from Red Hat. Exploitation assessment and catalog membership from CISA.

Published

2021-04-30 20:15Z5 YR AGO

Last updated

2024-08-03 18:09Z2 YR AGO

Reserved

2020-12-21

Assigning CNA

Chrome

Record state

PUBLISHED

Severity

Not rated by the issuing CNA

CNA CVSS vector

Not published by the issuing CNA

Weaknesses

• CWE-346Origin Validation ErrorClass

Data version

5.1

Document digest

1882df139035d0071abfe4e57db72dce33cc85cd0cf0b0011b63b1fa39d9d026

• chromereleases.googleblog.comhttps://chromereleases.googleblog.com/2021/04/stable-channel-update-for-desktop_26.htmlx_refsource_MISC
• crbug.comhttps://crbug.com/1198165x_refsource_MISC
• security.gentoo.orgGLSA-202104-08https://security.gentoo.org/glsa/202104-08vendor-advisoryx_refsource_GENTOO
• www.debian.orgDSA-4911https://www.debian.org/security/2021/dsa-4911vendor-advisoryx_refsource_DEBIAN
• lists.fedoraproject.orgFEDORA-2021-c3754414e7https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/VUZBGKGVZADNA3I24NVG7HAYYUTOSN5A/vendor-advisoryx_refsource_FEDORA
• lists.fedoraproject.orgFEDORA-2021-ff893e12c5https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/EAJ42L4JFPBJATCZ7MOZQTUDGV4OEHHG/vendor-advisoryx_refsource_FEDORA
• lists.fedoraproject.orgFEDORA-2021-35d2bb4627https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/U3GZ42MYPGD35V652ZPVPYYS7A7LVXVY/vendor-advisoryx_refsource_FEDORA