CVE-2021-3454

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

0.96% probability of exploitation activity in the next 30 days.

EPSS percentile

Equal to or higher than the score of 61.2% 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

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

2021-10-19 22:50Z5 YR AGO

Last updated

2024-09-17 00:01Z2 YR AGO

Reserved

2021-03-19

Assigning CNA

zephyr

Record state

PUBLISHED

Severity

Medium (CVSS 4.3)

CNA CVSS vector

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

Weaknesses

• CWE-130Improper Handling of Length Parameter InconsistencyBase
• CWE-617Reachable AssertionBase

Data version

5.1

Document digest

8bbd8cf2e31254f4aadbf7b85b84c0e245ae0ecb2a5c38ca53bebb480bc365dc

• github.comhttp://github.com/zephyrproject-rtos/zephyr/security/advisories/GHSA-fx88-6c29-vrp3x_refsource_MISC