CVE-2021-3910

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

1.21% probability of exploitation activity in the next 30 days.

EPSS percentile

Equal to or higher than the score of 68.2% of scored records. A rank, not a probability.

NVD base score

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

NVD CVSS vector

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

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

2021-11-11 21:45Z4 YR AGO

Last updated

2024-09-17 03:27Z2 YR AGO

Reserved

2021-10-26

Assigning CNA

cloudflare

Record state

PUBLISHED

Severity

Medium (CVSS 4.4)

CNA CVSS vector

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

Weaknesses

• CWE-20Improper Input ValidationClass

Data version

5.1

Document digest

b26b6ca50fdad2fe6341dbc7e590885b333370daeec1842bcf711797dd81a0aa

• github.comhttps://github.com/cloudflare/cfrpki/security/advisories/GHSA-5mxh-2qfv-4g7jx_refsource_MISC
• www.debian.orgDSA-5041https://www.debian.org/security/2022/dsa-5041vendor-advisoryx_refsource_DEBIAN