CVEvulnerability

CVE-2023-41991

5.5 MEDIUM Known exploited Published 2023-09-21 Modified 2026-06-17 Official page ↗

CISA Known Exploited Vulnerability

Apple Multiple Products Improper Certificate Validation Vulnerability — Apple Multiple Products

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

Added to KEV: 2023-09-25
Remediation due: 2023-10-16
Ransomware 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

Status: Analyzed
Published: 2023-09-21
Last modified: 2026-06-17
Assigner: [email protected]
CVSS 3.1 ([email protected]): 5.5 MEDIUM — CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N
CVSS 3.1 (134c704f-9b21-4f2e-91b3-4a467353bcc0): 5.5 MEDIUM — CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N
Weaknesses: CWE-295

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.

Affected configurations

• apple ipados (< 16.7) • apple ipados 17.0 • apple iphone os (< 16.7) • apple iphone os 17.0 • apple macos (>= 13.0 < 13.6)

Weakness · CWE (1)

CWE-295 Improper Certificate Validation weakness

References