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

> CVE-2023-41991: Apple Multiple Products Improper Certificate Validation Vulnerability. CVSS 5.5 (CVSS 3.1), in CISA KEV.

Canonical: https://rewindex.com/cve/CVE-2023-41991
Last updated: 2025-11-04T19:21:39Z

- Published: 2023-09-21 18:23 UTC · Updated: 2025-11-04 19:21 UTC · Assigner: apple
- CVSS: 5.5 (CVSS 3.1) · Severity: Medium · Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N
- EPSS: 13.4%, 96th percentile (scored 2026-10-25)
- CISA KEV: yes, added 2023-09-25, federal due date 2023-10-16, ransomware use: Unknown

## Description

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.

## CISA required action

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

## Affected vendors and products

- Apple: iOS and iPadOS
- Apple: macOS

## References

- [CVE record on cve.org](https://www.cve.org/CVERecord?id=CVE-2023-41991)
- [NVD entry](https://nvd.nist.gov/vuln/detail/CVE-2023-41991)
- [https://support.apple.com/en-us/HT213927](https://support.apple.com/en-us/HT213927)
- [https://support.apple.com/en-us/HT213931](https://support.apple.com/en-us/HT213931)

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_Sources: CVE records from the CVE Program (cve.org). CVE® is a registered trademark of The MITRE Corporation. (https://www.cve.org/) This product uses data from the NVD API but is not endorsed or certified by the NVD. (https://nvd.nist.gov/) Known Exploited Vulnerabilities catalog from CISA. (https://www.cisa.gov/known-exploited-vulnerabilities-catalog) EPSS scores from FIRST (Exploit Prediction Scoring System). (https://www.first.org/epss/)_


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Canonical: https://rewindex.com/cve/CVE-2023-41991 · Markdown: https://rewindex.com/cve/CVE-2023-41991.md · JSON: https://rewindex.com/api/v1/cves/CVE-2023-41991 · Data licensed CC BY 4.0 (https://creativecommons.org/licenses/by/4.0/) · Generated 2026-10-26T03:13:23.678Z