9.3

CVE-2021-1867: apple ios and ipados Out-of-bounds Read

CVSS: 9.3v2.0HighModified
Published 08-09-2021Last modified 03-08-2024
Open JSON

Vulnerability summary

CVE-2021-1867 is a high (CVSS 9.3) Out-of-bounds Read vulnerability in apple ios and ipados. EPSS estimates a 1.85% chance of exploitation in the next 30 days, higher than 78.8% of scored vulnerabilities.

Overall risk
70/100
0100
High · default modelHow is this calculated?
CVSS score
9.3/10
010
High · v2.0 (NVD)
EPSS score
1.85%
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

An out-of-bounds read was addressed with improved input validation. This issue is fixed in iOS 14.5 and iPadOS 14.5, macOS Big Sur 11.3. A malicious application may be able to execute arbitrary code with kernel privileges.

CVSS metrics

2 scores · 1 source · 2 versions

EPSS trend

Probability

1.85%

Chance of exploitation in the next 30 days

Percentile

79%

Versus all other CVEs

30-day change

0.00 pp

From 1.85% on 20-09-2026

20-09-202620-10-2026
EPSS score
1.85%

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

Apple4 products

1 vendor · 4 products

References

2 links