CVE-2021-4300

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

2023-01-04 21:14Z3 YR AGO

Last updated

2024-08-03 17:23Z2 YR AGO

Reserved

2023-01-04

Assigning CNA

VulDB

Record state

PUBLISHED

Severity

Medium (CVSS 6.3)

CNA CVSS vector

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

Weaknesses

• CWE-284Improper Access ControlPillar

Data version

5.1

Document digest

b985b740fe20b3d1e4854cbc5cd49a2bb33310f63e9786eba473b1d5eda73150

• vuldb.comhttps://vuldb.com/?id.217417vdb-entrytechnical-description
• vuldb.comhttps://vuldb.com/?ctiid.217417signaturepermissions-required
• github.comhttps://github.com/ghostlander/Halcyon/commit/0675b25ae9cc10b5fdc8ea3a32c642979762d45epatch
• github.comhttps://github.com/ghostlander/Halcyon/releases/tag/v1.1.1.0-halpatch