CVE-2021-30547

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

3.61% probability of exploitation activity in the next 30 days.

EPSS percentile

Equal to or higher than the score of 89.1% of scored records. A rank, not a probability.

NVD base score

8.8 (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:H/I:H/A:H

NVD analysis status

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

Red Hat severity

Important. Red Hat's rating for its own products, not a CVSS rating.

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

2021-06-15 21:40Z5 YR AGO

Last updated

2024-08-03 22:32Z2 YR AGO

Reserved

2021-04-13

Assigning CNA

Chrome

Record state

PUBLISHED

Severity

Not rated by the issuing CNA

CNA CVSS vector

Not published by the issuing CNA

Weaknesses

• CWE-787Out-of-bounds WriteBase

Data version

5.1

Document digest

e504beff9eb82216233507e5c7318dffc30019716b93981350f5a77ccce88722

• chromereleases.googleblog.comhttps://chromereleases.googleblog.com/2021/06/stable-channel-update-for-desktop.htmlx_refsource_MISC
• crbug.comhttps://crbug.com/1210414x_refsource_MISC
• lists.fedoraproject.orgFEDORA-2021-f94dadff78https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/PAT6EOXVQFE6JFMFQF4IKAOUQSHMHL54/vendor-advisoryx_refsource_FEDORA
• www.debian.orgDSA-4939https://www.debian.org/security/2021/dsa-4939vendor-advisoryx_refsource_DEBIAN
• lists.debian.org[debian-lts-announce] 20210715 [SECURITY] [DLA 2709-1] firefox-esr security updatehttps://lists.debian.org/debian-lts-announce/2021/07/msg00009.htmlmailing-listx_refsource_MLIST
• lists.fedoraproject.orgFEDORA-2021-ca58c57bdfhttps://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/ETMZL6IHCTCTREEL434BQ4THQ7EOHJ43/vendor-advisoryx_refsource_FEDORA
• www.debian.orgDSA-4940https://www.debian.org/security/2021/dsa-4940vendor-advisoryx_refsource_DEBIAN
• lists.debian.org[debian-lts-announce] 20210719 [SECURITY] [DLA 2711-1] thunderbird security updatehttps://lists.debian.org/debian-lts-announce/2021/07/msg00010.htmlmailing-listx_refsource_MLIST
• security.gentoo.orgGLSA-202202-03https://security.gentoo.org/glsa/202202-03vendor-advisoryx_refsource_GENTOO
• security.gentoo.orgGLSA-202208-14https://security.gentoo.org/glsa/202208-14vendor-advisoryx_refsource_GENTOO