# CVE-2023-41991: Apple Multiple Products Improper Certificate Validation Vulnerability

Source: https://junglewise.ai/threats/cve-2023-41991-apple-multiple-products-improper-certificate-validation  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2023-09-25. Updated: 2026-05-09  
License: CC BY 4.0 with a link back

CVE-2023-41991 · Severity: critical · CVSS 5.5 · Exploited in the wild · Published 2023-09-25

Apple iOS, iPadOS, macOS, and watchOS contain an improper certificate validation vulnerability. A malicious app can exploit this issue to bypass signature validation, potentially allowing the execution of unsigned or improperly signed code.

Technologies: [Apple Multiple Products](https://junglewise.ai/threats/technologies/multiple-products). Vendors: [Apple](https://junglewise.ai/threats/vendors/apple).

## Quick answers

**Is CVE-2023-41991 exploited in the wild?** Yes. CVE-2023-41991 is known to be exploited in the wild, first recorded on 25 September 2023. Treat it as urgent.

**How severe is CVE-2023-41991?** Critical severity, with a CVSS score of 5.5, published 25 September 2023.

**Which products and versions are affected?** Apple iOS before 16.7, 17.0; Apple iPadOS before 16.7, 17.0; Apple macOS 13.0 to before 13.6; Apple watchOS before 9.6.3, 10.0.0.

**Is there a fix for CVE-2023-41991?** A patch was published on 2023-09-25: Fixed in macOS Ventura 13.6, iOS 16.7, and iPadOS 16.7 Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

**How is CVE-2023-41991 attacked?** It is attacked with local access, in an operating system.

**Am I affected by CVE-2023-41991?** Check whether you run Apple Multiple Products. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

## Affected products

- Apple iOS before 16.7, 17.0
- Apple iPadOS before 16.7, 17.0
- Apple macOS 13.0 to before 13.6
- Apple watchOS before 9.6.3, 10.0.0

## Timeline

- 2023-09-25: disclosed
- 2023-09-25: kev added: Added to CISA Known Exploited Vulnerabilities Catalog
- 2023-09-25: patched: Fixed in macOS Ventura 13.6, iOS 16.7, and iPadOS 16.7
- exploited: Apple is aware of reports that this issue may have been actively exploited against versions of iOS before iOS 16.7.

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