CVE Watch—

CVE-2023-41991

Apple Multiple Products Improper Certificate Validation Vulnerability

CVSS

—

No CVSS

EPSS

4.5%

p91

KEV

YES

Sep 25, 2023

Exploit Today

0-100

Published: — · Last modified: —

EPSS · 30d

4.5%EPSS · 30 days4.5%

2026-06-302026-07-17

KEV catalog record

Product

Apple / Multiple Products

Vulnerability

Apple Multiple Products Improper Certificate Validation Vulnerability

Added to KEV

Sep 25, 2023

Remediate by

Oct 16, 2023

Known ransomware use

Summary description

Apple iOS, iPadOS, macOS, and watchOS contain an improper certificate validation vulnerability that can allow a malicious app to bypass signature validation.

Required action

Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.

Notes

https://support.apple.com/en-us/HT213926, https://support.apple.com/en-us/HT213927, https://support.apple.com/en-us/HT213928, https://support.apple.com/en-us/HT213929, https://support.apple.com/en-us/HT213931 ; https://nvd.nist.gov/vuln/detail/CVE-2023-41991

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