CVE-2021-3907

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

4.19% probability of exploitation activity in the next 30 days.

EPSS percentile

Equal to or higher than the score of 90.7% 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

2021-11-11 21:45Z4 YR AGO

Last updated

2024-09-17 03:18Z2 YR AGO

Reserved

2021-10-26

Assigning CNA

cloudflare

Record state

PUBLISHED

Severity

High (CVSS 7.4)

CNA CVSS vector

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

Weaknesses

• CWE-20Improper Input ValidationClass
• CWE-22Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')Base

Data version

5.1

Document digest

5121c377a098da7f9e91cab0fc8c61e9a8217b78ad0123e1366d1db33b6125fe

• github.comhttps://github.com/cloudflare/cfrpki/security/advisories/GHSA-cqh2-vc2f-q4fhx_refsource_MISC
• www.debian.orgDSA-5033https://www.debian.org/security/2021/dsa-5033vendor-advisoryx_refsource_DEBIAN
• www.debian.orgDSA-5041https://www.debian.org/security/2022/dsa-5041vendor-advisoryx_refsource_DEBIAN
• github.comhttps://github.com/cloudflare/cfrpki/security/advisories/GHSA-3jhm-87m6-x959x_refsource_MISC