CVE-2023-41991

CVE Enrichment

CVSS: 5.5 MEDIUM
EPSS: 13.38%
EPSS Percentile: 96.38%
CISA KEV: YES — Known Exploited Vulnerability

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.

Technical Details

CVSS Version: 3.1
CNA / NVD Source: product-security@apple.com
Published: 22-Sep-2023 02:15
Last Modified: 17-Jun-2026 13:23
EPSS Date: 2026-10-16
CWE: CWE-295

CVSS Vector


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

CISA KEV Details

Date Added: 2023-09-25
Remediation Due: 2023-10-16
Known Ransomware Campaign Use: Unknown
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

Affected Products / Versions

apple / ipados
Version / affected range: * · before (exclusive) 16.7
cpe:2.3:o:apple:ipados:*:*:*:*:*:*:*:*
apple / ipados
Version / affected range: 17.0
cpe:2.3:o:apple:ipados:17.0:*:*:*:*:*:*:*
apple / iphone_os
Version / affected range: * · before (exclusive) 16.7
cpe:2.3:o:apple:iphone_os:*:*:*:*:*:*:*:*
apple / iphone_os
Version / affected range: 17.0
cpe:2.3:o:apple:iphone_os:17.0:*:*:*:*:*:*:*
apple / macos
Version / affected range: * · from (inclusive) 13.0 · before (exclusive) 13.6
cpe:2.3:o:apple:macos:*:*:*:*:*:*:*:*

References

Last enrichment sync: 17-Oct-2026 09:49
Sources: NVD · FIRST EPSS · CISA KEV
Latest successful provider update; providers refresh independently.

Reported Context (1)

In late September 2023, Apple issued emergency patches addressing three zero-day vulnerabilities (CVE-2023-41992, CVE-2023-41991, and CVE-2023-41993) in iPhones and iPads. Zero-Day Vulnerabilities: How They Work, Notable Attacks and Ways to Reduce Risk

CVE (3)

Malware (3)

Vendors (2)

Products (1)

Industries (1)

Countries (1)

Note: Related entities, including threat actors, malware, CVEs, MITRE ATT&CK techniques, vendors, products, tools, countries, and industries, are shown when they appear in the same reporting. Their presence does not necessarily mean they were targeted, compromised, vulnerable, responsible for the activity, or directly involved in the incident.