CVE-2021-1881

moderate-risk
Published 2021-09-08

An out-of-bounds read was addressed with improved input validation. This issue is fixed in Security Update 2021-002 Catalina, Security Update 2021-003 Mojave, iOS 14.5 and iPadOS 14.5, watchOS 7.4, tvOS 14.5, macOS Big Sur 11.3. Processing a maliciously crafted font file may lead to arbitrary code execution.

Do I need to act?

-
0.50% chance of exploitation
EPSS score — low exploit probability
-
Not on CISA KEV list
No confirmed active exploitation reported to CISA
?
Patch status unknown
Check vendor advisories for fix availability and mitigation guidance
7
CVSS 7.8/10 High
LOCAL / LOW complexity

Affected Products (20)

Affected Vendors

Apple

References (12)

Vendor Advisory https://support.apple.com/en-us/HT212317
Vendor Advisory https://support.apple.com/en-us/HT212323
Vendor Advisory https://support.apple.com/en-us/HT212324
Vendor Advisory https://support.apple.com/en-us/HT212325
Vendor Advisory https://support.apple.com/en-us/HT212326
Vendor Advisory https://support.apple.com/en-us/HT212327
Vendor Advisory https://support.apple.com/en-us/HT212317
Vendor Advisory https://support.apple.com/en-us/HT212323
Vendor Advisory https://support.apple.com/en-us/HT212324
Vendor Advisory https://support.apple.com/en-us/HT212325
Vendor Advisory https://support.apple.com/en-us/HT212326
Vendor Advisory https://support.apple.com/en-us/HT212327
49
/ 100
moderate-risk
Severity 24/34 · High
Exploitability 2/34 · Minimal
Exposure 23/34 · High