CVE-2021-3406

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

0.66% probability of exploitation activity in the next 30 days.

EPSS percentile

Ranks above 48.9% of scored records. A rank, not a probability.

NVD base score

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

NVD CVSS vector

CVSS:3.1/AV:N/AC:L/PR:N/UI: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

2021-02-25 19:15Z5 YR AGO

Last updated

2024-08-03 16:53Z2 YR AGO

Reserved

2021-02-09

Assigning CNA

redhat

Record state

PUBLISHED

Severity

Not rated by the issuing CNA

CNA CVSS vector

Not published by the issuing CNA

Weaknesses

• CWE-347Improper Verification of Cryptographic SignatureBase
• CWE-295Improper Certificate ValidationBase

Data version

5.1

Document digest

be725dc3e19aede160463ced2174f94d80fe2e39772f0d4f943f00dc0b612b94

• bugzilla.redhat.comhttps://bugzilla.redhat.com/show_bug.cgi?id=1932469x_refsource_MISC
• github.comhttps://github.com/keylime/keylime/security/advisories/GHSA-78f8-6c68-375mx_refsource_MISC
• lists.fedoraproject.orgFEDORA-2021-b7854ccfe4https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/YAWKEF2LVXUME266T6RNRVBGAD375QAT/vendor-advisoryx_refsource_FEDORA