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CVE-2023-41991

59
FAUCET Score

CVE-2023-41991 is a certificate validation vulnerability affecting Apple's macOS, iOS, and iPadOS, allowing a malicious app to bypass signature validation. This medium-severity flaw (CVSS 5.5) requires user interaction (UI:R) and local access (AV:L) to achieve high integrity impact (I:H). Apple has confirmed active exploitation of this zero-day vulnerability against iOS versions prior to 16.7, leading to its inclusion in CISA's KEV catalog. Despite no public exploit code, the vulnerability has garnered significant community discussion and media coverage, highlighting its critical nature.

Impacted Technologies

VendorProductVersion(s)CPE
< 16.7CPE matchmatch criteria
cpe:2.3:o:apple:ipados:*:*:*:*:*:*:*:*
17.0CPE matchmatch criteria
cpe:2.3:o:apple:ipados:17.0:*:*:*:*:*:*:*
< 16.7CPE matchmatch criteria
cpe:2.3:o:apple:iphone_os:*:*:*:*:*:*:*:*
17.0CPE matchmatch criteria
cpe:2.3:o:apple:iphone_os:17.0:*:*:*:*:*:*:*
>= 13.0, < 13.6CPE matchmatch criteria
cpe:2.3:o:apple:macos:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

5.5MEDIUM

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

Attack Vector
LOCAL
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
REQUIRED
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
HIGH
Availability Impact
NONE
Exploitability Score
1.8
Impact Score
3.6
CvssVersion
3.1

Exploit Intelligence

EPSS Score
4.55%
Probability of exploitation in next 30 days
EPSS Percentile
90.6%
Percentile rank of EPSS score among Peer Group
As of 2026-07-28
Model: v2026.06.15
Added to KEV · Sep 25, 2023
This CVE's current EPSS score of 0.0455 is in the 97th percentile among its peer group of 5,765 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.0 Bluesky, 0.0 Mastodon, and 0.1 GitHub mentions.

Media Mentions

The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Vendor Patches (1)

applevendor investigatingvia nvd_reference
View patch

References

cisa.gov / known-exploited-vulnerabilities-catalog
US Government Resource
support.apple.com / kb/HT213927
Vendor Advisory
support.apple.com / kb/HT213931
Vendor Advisory
support.apple.com / en-us/HT213927
Vendor Advisory
support.apple.com / en-us/HT213931
Vendor Advisory