CVE-2021-30855

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

2.40% probability of exploitation activity in the next 30 days.

EPSS percentile

Ranks above 82.5% of scored records. A rank, not a probability.

NVD base score

5.5 (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:N/A:N

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 18:49Z5 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-59Improper Link Resolution Before File Access ('Link Following')Base

Data version

5.1

Document digest

310dff131a7051cdb6298e6d774a4566ec12746b478beedbf57e5c643cf95840

• support.apple.comhttps://support.apple.com/en-us/HT212804x_refsource_MISC
• support.apple.comhttps://support.apple.com/en-us/HT212805x_refsource_MISC
• support.apple.comhttps://support.apple.com/en-us/HT212807x_refsource_MISC
• support.apple.comhttps://support.apple.com/kb/HT212815x_refsource_CONFIRM
• support.apple.comhttps://support.apple.com/en-us/HT212814x_refsource_MISC
• support.apple.comhttps://support.apple.com/en-us/HT212819x_refsource_MISC