CVE-2021-1820

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

1.33% probability of exploitation activity in the next 30 days.

EPSS percentile

Ranks above 68.8% of scored records. A rank, not a probability.

NVD base score

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

NVD CVSS vector

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

NVD analysis status

Modified. NVD last modified this record on 2026-06-17.

Red Hat severity

Moderate. Red Hat's rating for its own products, not a CVSS rating.

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

2021-09-08 14:54Z4 YR AGO

Last updated

2024-08-03 16:25Z2 YR AGO

Reserved

2020-12-08

Assigning CNA

apple

Record state

PUBLISHED

Severity

Not rated by the issuing CNA

CNA CVSS vector

Not published by the issuing CNA

Weaknesses

• CWE-665Improper InitializationClass
• CWE-20Improper Input ValidationClass

Data version

5.1

Document digest

a32ab7b0716c3ab4fa17dd7d9cf7ceddbdfb77b2563d6873a2e0ed59c0186bff

• support.apple.comhttps://support.apple.com/en-us/HT212317x_refsource_MISC
• support.apple.comhttps://support.apple.com/en-us/HT212323x_refsource_MISC
• support.apple.comhttps://support.apple.com/en-us/HT212324x_refsource_MISC
• support.apple.comhttps://support.apple.com/en-us/HT212325x_refsource_MISC