CVE-2021-31010

ENISA EUVD: EUVD-2021-17927 ↗
Exploited in the Wild ✓ Confirmed 0-Day ★ Google Project Zero
Triaged: March 5, 2026 1 article Published: 2021-08-24
VulnLookup ↗ NVD ↗ EUVD ↗ MITRE ↗ Advisory ↗ P0 Sheet ↗ CISA KEV ↗

EPSS Score

Source: FIRST.org · 2026-05-23
0.72%
probability
This CVE has a 0.72% probability of being exploited in the next 30 days.
0% Top 72.7th percentile of all CVEs 100%

CVSS v3.1

Source: VulnerabilityLookup (CIRCL)
7.5
HIGH
Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
High
Availability
None
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N

CVSS v2 (legacy)

5.0
MEDIUM
Access Vector
Network
Access Complexity
Low
Authentication
None
Confidentiality
None
Integrity
Partial
Availability
None
AV:N/AC:L/Au:N/C:N/I:P/A:N

Description

VulnerabilityLookup (CNA)
A deserialization issue was addressed through improved validation. This issue is fixed in Security Update 2021-005 Catalina, iOS 12.5.5, iOS 14.8 and iPadOS 14.8, macOS Big Sur 11.6, watchOS 7.6.2. A sandboxed process may be able to circumvent sandbox restrictions. Apple was aware of a report that this issue may have been actively exploited at the time of release..

Affected Products

Apple
macOS
unspecified
Apple
macOS
unspecified
Apple
watchOS
unspecified
Apple
watchOS
unspecified
Apple
watchOS
unspecified

Attack Intelligence

Google Project Zero

Patched
Sept. 13, 2021
Reported by
The Citizen Lab & Google Project Zero
Root Cause Analysis
???

Signal Intelligence

Confidenceⓘ
95%
EPSS 0.72%
CVSS v3.1 7.5
Mentions 1

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 DateAug 24, 2021