8.8

CVE-2021-1876: apple mac_os_x Use After Free

CVSS: 8.8v3.1HighModified
Published 08-09-2021Last modified 03-08-2024
Open JSON

Vulnerability summary

CVE-2021-1876 is a high (CVSS 8.8) Use After Free vulnerability in apple mac_os_x. EPSS estimates a 1.26% chance of exploitation in the next 30 days, higher than 69.1% of scored vulnerabilities.

Overall risk
35/100
0100
Medium · default modelHow is this calculated?
CVSS score
8.8/10
010
High · v3.1 (NVD)
EPSS score
1.26%
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 use after free issue was addressed with improved memory management. This issue is fixed in macOS Big Sur 11.3, Security Update 2021-002 Catalina, Security Update 2021-003 Mojave. Processing maliciously crafted web content may lead to arbitrary code execution.

CVSS metrics

2 scores · 1 source · 2 versions

EPSS trend

Probability

1.26%

Chance of exploitation in the next 30 days

Percentile

69%

Versus all other CVEs

30-day change

0.00 pp

From 1.26% on 19-09-2026

19-09-202619-10-2026
EPSS score
1.26%

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

Apple2 products
  • mac_os_x≥ 10.14, ≤ 10.14.5 | ≥ 10.15, ≤ 10.15.5 | 10.14.6 | 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:supplemental_update | 10.14.6:supplemental_update_2 | 10.15.6 | 10.15.6:supplemental_update | 10.15.7 | 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:supplemental_update
  • macos≥ unspecified, < 11.3 | ≥ unspecified, < 2021 | ≥ 11.0, < 11.3

1 vendor · 2 products

References

3 links