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CVE-2021-30805: apple mac_os_x Out-of-bounds Write

CVSS: 10.0v2.0HighModified
Published 08-09-2021Last modified 03-08-2024
Open JSON

Vulnerability summary

CVE-2021-30805 is a high (CVSS 10.0) Out-of-bounds Write vulnerability in apple mac_os_x. EPSS estimates a 3.15% chance of exploitation in the next 30 days, higher than 87.8% of scored vulnerabilities.

Overall risk
70/100
0100
High · default modelHow is this calculated?
CVSS score
10.0/10
010
High · v2.0 (NVD)
EPSS score
3.15%
0%100%
Low · 0.00 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Timeline

  1. 08-09-2021
    PublishedVulnerability first disclosed.
  2. 03-08-2024
    Last modifiedVulnerability information updated.

Description

A memory corruption issue was addressed with improved input validation. This issue is fixed in macOS Big Sur 11.5, Security Update 2021-004 Catalina, Security Update 2021-005 Mojave. An application may be able to execute arbitrary code with kernel privileges.

CVSS metrics

2 scores · 1 source · 2 versions

EPSS trend

Probability

3.15%

Chance of exploitation in the next 30 days

Percentile

88%

Versus all other CVEs

30-day change

0.00 pp

From 3.15% on 21-09-2026

21-09-202621-10-2026
EPSS score
3.15%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Apple3 products
  • mac_os_x≥ 10.14, ≤ 10.14.6 | ≥ 10.15, ≤ 10.15.7 | 10.14.6:security_update_2019-001 | 10.14.6:security_update_2019-002 | 10.14.6:security_update_2019-004 | 10.14.6:security_update_2019-005 | 10.14.6:security_update_2019-006 | 10.14.6:security_update_2019-007 | 10.14.6:security_update_2020-001 | 10.14.6:security_update_2020-002 | 10.14.6:security_update_2020-003 | 10.14.6:security_update_2020-004 | 10.14.6:security_update_2020-005 | 10.14.6:security_update_2020-006 | 10.14.6:security_update_2020-007 | 10.14.6:security_update_2021-001 | 10.14.6:security_update_2021-002 | 10.14.6:security_update_2021-003 | 10.14.6:security_update_2021-004 | 10.14.6:supplemental_update | 10.14.6:supplemental_update_2 | 10.15.6:supplemental_update | 10.15.7:security_update_2020 | 10.15.7:security_update_2020-001 | 10.15.7:security_update_2020-005 | 10.15.7:security_update_2020-007 | 10.15.7:security_update_2021-001 | 10.15.7:security_update_2021-002 | 10.15.7:security_update_2021-003 | 10.15.7:supplemental_update
  • macos≥ unspecified, < 11.5 | ≥ unspecified, < 2021 | ≥ 11.0, < 11.5
  • security update - catalina≥ unspecified, < 2021

1 vendor · 3 products

References

3 links