CVE-2021-30481

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

3.50% probability of exploitation activity in the next 30 days.

EPSS percentile

Ranks above 88.1% of scored records. A rank, not a probability.

NVD base score

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

NVD CVSS vector

CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/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

2021-04-10 18:31Z5 YR AGO

Last updated

2025-11-03 05:30Z10 MO AGO

Reserved

2021-04-10

Assigning CNA

mitre

Record state

PUBLISHED

Severity

High (CVSS 8.0)

CNA CVSS vector

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

Weaknesses

• CWE-120Buffer Copy without Checking Size of Input ('Classic Buffer Overflow')Base

Data version

5.2

Document digest

0138b146692e13fd76f2ad8538b215fdce3b9df7ceaf6a18dca9b020b68e3cc8

• twitter.comhttps://twitter.com/the_secret_club/status/1380868759129296900
• www.youtube.comhttps://www.youtube.com/watch?v=rNQn--9xR1Q
• news.ycombinator.comhttps://news.ycombinator.com/item?id=26762170
• twitter.comhttps://twitter.com/floesen_/status/1337107178096881666