CVE-2021-30957

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

1.31% probability of exploitation activity in the next 30 days.

EPSS percentile

Equal to or higher than the score of 70.3% of scored records. A rank, not a probability.

NVD base score

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

NVD CVSS vector

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

2021-08-24 18:50Z5 YR AGO

Last updated

2024-08-03 22:48Z2 YR AGO

Reserved

2021-04-13

Assigning CNA

apple

Record state

PUBLISHED

Severity

Not rated by the issuing CNA

CNA CVSS vector

Not published by the issuing CNA

Weaknesses

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

Data version

5.1

Document digest

d74f6708e0cf960046032870b9603418a8470df1018eba187cd06b3c8f1a9a79

• support.apple.comhttps://support.apple.com/kb/HT212979x_refsource_CONFIRM
• support.apple.comhttps://support.apple.com/en-us/HT212975x_refsource_MISC
• support.apple.comhttps://support.apple.com/en-us/HT212976x_refsource_MISC
• support.apple.comhttps://support.apple.com/en-us/HT212978x_refsource_MISC
• support.apple.comhttps://support.apple.com/en-us/HT212980x_refsource_MISC