CVE-2021-30807

ENISA EUVD: EUVD-2021-17724 ↗
Exploited in the Wild ✓ Confirmed 0-Day ★ Google Project Zero
Triaged: March 5, 2026 6 articles Published: 2021-10-19
VulnLookup ↗ NVD ↗ EUVD ↗ MITRE ↗ Advisory ↗ P0 Sheet ↗ CISA KEV ↗

EPSS Score

Source: FIRST.org · 2026-05-23
21.03%
probability
This CVE has a 21.03% probability of being exploited in the next 30 days.
0% Top 95.7th percentile of all CVEs 100%

CVSS v3.1

Source: VulnerabilityLookup (CIRCL)
7.8
HIGH
Attack Vector
Local
Attack Complexity
Low
Privileges Required
None
User Interaction
Required
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

CVSS v2 (legacy)

9.3
HIGH
Access Vector
Network
Access Complexity
Medium
Authentication
None
Confidentiality
Complete
Integrity
Complete
Availability
Complete
AV:N/AC:M/Au:N/C:C/I:C/A:C

Description

VulnerabilityLookup (CNA)
A memory corruption issue was addressed with improved memory handling. This issue is fixed in macOS Big Sur 11.5.1, iOS 14.7.1 and iPadOS 14.7.1, watchOS 7.6.1. An application may be able to execute arbitrary code with kernel privileges. Apple is aware of a report that this issue may have been actively exploited.

Affected Products

Apple
macOS
unspecified
Apple
macOS
unspecified
Apple
macOS
unspecified

Attack Intelligence

Google Project Zero

Patched
July 26, 2021
Reported by
???
Root Cause Analysis
???

Exploits & PoC

jsherman212/iomfb-exploit

Exploit for CVE-2021-30807

133 2021-11-29
30440r/gex

Gex is an iOS 14.7 jailbreak using CVE-2021-30807 IOMFB & CVE-2021-30860 exploit(s)

5 2022-02-12
2 repos — triés par ⭐ Rechercher sur GitHub ↗

Signal Intelligence

Confidenceⓘ
95%
EPSS 21.03%
CVSS v3.1 7.8
Mentions 6
Last Seen Nov 09, 2021

CNA Information

CNA Assigner
apple

Analyst Note

Auto-imported from Google Project Zero — confirmed zero-day by definition.

Triage Info

Decided atMar 05, 2026
Published DateOct 19, 2021