CVE-2021-31924

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

0.33% probability of exploitation activity in the next 30 days.

EPSS percentile

Ranks above 26.1% of scored records. A rank, not a probability.

NVD base score

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

NVD CVSS vector

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

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

2021-05-25 23:40Z5 YR AGO

Last updated

2024-08-03 23:10Z2 YR AGO

Reserved

2021-04-30

Assigning CNA

mitre

Record state

PUBLISHED

Severity

Not rated by the issuing CNA

CNA CVSS vector

Not published by the issuing CNA

Weaknesses

• CWE-287Improper AuthenticationClass

Data version

5.1

Document digest

75fca50588952517a9b0c379ef091e1d0d7da39cec8077fe699912b5a185076d

• www.yubico.comhttps://www.yubico.com/support/security-advisories/ysa-2021-03x_refsource_MISC
• developers.yubico.comhttps://developers.yubico.com/pam-u2f/x_refsource_MISC
• lists.fedoraproject.orgFEDORA-2021-a52d48b1c2https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/CRBVOZEMVO72FV4Z5O4GBGSURXHWRGD3/vendor-advisoryx_refsource_FEDORA
• lists.fedoraproject.orgFEDORA-2021-724f4733e9https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/IL3I5AKECLMK4ADLLACLOEF7H5CMNDP2/vendor-advisoryx_refsource_FEDORA
• security.gentoo.orgGLSA-202208-11https://security.gentoo.org/glsa/202208-11vendor-advisoryx_refsource_GENTOO