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CVE-2023-41991

MediumPublished

Apple Multiple Products Improper Certificate Validation Vulnerability

Published: Sep 21, 2023
Updated: Nov 4, 2025
Assigning CNA: apple
Evidence observed: Sep 25, 2023

Primary CVSS

5.5/ 10Medium

nvd · CVSS 3.1

CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N

EPSS probability estimate

4.5%

Low · next 30 days

Percentile: 91.2%
Model date: Sep 21, 2026

EPSS is a statistical estimate, not a certainty or a measure of impact. Combine it with CVSS, KEV status, exposure and your environment.

CISA Known Exploited

This CVE appears in the CISA Known Exploited Vulnerabilities catalog.

Summary

A certificate validation issue was addressed. This issue is fixed in macOS Ventura 13.6, iOS 16.7 and iPadOS 16.7. A malicious app may be able to bypass signature validation. Apple is aware of a report that this issue may have been actively exploited against versions of iOS before iOS 16.7.

Sources

appsignExploit
iOS/macOS library that exploits CVE-2023-41991 for signing iOS applications.
CVE-2023-41991PoC
Proof-of-concept exploit for CVE-2023-41991, demonstrating the vulnerability and providing a working exploit for security testing and validation.

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