CVE-2021-37976

Exploitation

Exploited in the wild. Listed in the CISA Known Exploited Vulnerabilities catalog on 2021-11-03. Federal remediation due 2021-11-17.

SSVC decision

• ExploitationactiveCISA reports credible evidence of active exploitation.
• AutomatablenoAt least one step from reconnaissance to exploitation cannot be reliably automated.
• Technical ImpactpartialSuccessful exploitation gives limited control of the vulnerable component.

CISA publishes the decision points, not a final SSVC decision. The decision also depends on mission and well-being impact, which is a property of your deployment rather than of the vulnerability.

EPSS probability

19.90% probability of exploitation activity in the next 30 days.

EPSS percentile

Equal to or higher than the score of 97.3% 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:H/I:N/A:N

NVD analysis status

Analyzed. 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

2021-10-08 21:50Z5 YR AGO

Last updated

2025-10-21 23:25Z1 YR AGO

Reserved

2021-08-03

Assigning CNA

Chrome

Record state

PUBLISHED

Severity

Medium (CVSS 6.5)

CNA CVSS vector

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

Weaknesses

• CWE-862Missing AuthorizationClass

Data version

5.1

Document digest

ca5f69d57cc61e9412619637732fbe50f444cc4f93a2775f88c75a58b44ca010

• chromereleases.googleblog.comhttps://chromereleases.googleblog.com/2021/09/stable-channel-update-for-desktop_30.htmlx_refsource_MISC
• crbug.comhttps://crbug.com/1251787x_refsource_MISC
• lists.fedoraproject.orgFEDORA-2021-116eff380fhttps://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/D63JZ3ROXCUHP4CFWDHCPZNTGET7T34R/vendor-advisoryx_refsource_FEDORA
• lists.fedoraproject.orgFEDORA-2021-5ffabdc080https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/FRFXUDH46PFVE75VQVWY6PYY5DK3S2XT/vendor-advisoryx_refsource_FEDORA
• lists.fedoraproject.orgFEDORA-2021-5093f11905https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/RNARCF5HEZK7GJXZRN5TQ45AQDCRM2WO/vendor-advisoryx_refsource_FEDORA
• www.debian.orgDSA-5046https://www.debian.org/security/2022/dsa-5046vendor-advisoryx_refsource_DEBIAN
• www.cisa.govhttps://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2021-37976government-resource