9.3

CVE-2021-1767: apple ios and ipados Out-of-bounds Write

CVSS: 9.3v2.0HighModified
Published 02-04-2021Last modified 03-08-2024
Open JSON

Vulnerability summary

CVE-2021-1767 is a high (CVSS 9.3) Out-of-bounds Write vulnerability in apple ios and ipados. EPSS estimates a 0.85% chance of exploitation in the next 30 days, higher than 57.6% 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
0.85%
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. 02-04-2021
    PublishedVulnerability first disclosed.
  2. 03-08-2024
    Last modifiedVulnerability information updated.

Description

This issue was addressed with improved checks. This issue is fixed in macOS Big Sur 11.2, Security Update 2021-001 Catalina, Security Update 2021-001 Mojave, iOS 14.4 and iPadOS 14.4. Processing a maliciously crafted image may lead to heap corruption.

CVSS metrics

2 scores · 1 source · 2 versions

EPSS trend

Probability

0.85%

Chance of exploitation in the next 30 days

Percentile

58%

Versus all other CVEs

30-day change

0.00 pp

From 0.85% on 19-09-2026

19-09-202619-10-2026
EPSS score
0.85%

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

Apple5 products
  • ios and ipados≥ unspecified, < 14.4
  • ipados< 14.4
  • iphone_os< 14.4
  • mac_os_x≥ 10.14, < 10.14.6 | ≥ 10.15, < 10.15.7 | 10.14.6 | 10.14.6:security_update_2019-001 | 10.14.6:security_update_2019-002 | 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:supplemental_update | 10.14.6:supplemental_update_2 | 10.15.7 | 10.15.7:supplemental_update
  • macos≥ unspecified, < 11.2 | ≥ 11.0, < 11.2

1 vendor · 5 products

References

2 links