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Known exploited vulnerability

CVE-2023-41991

mediumCVSS 3.1 5.5In CISA KEVEPSS 13%Published · Apple

The short answer

CVE-2023-41991 affects Apple iOS and iPadOS and is rated medium (CVSS 5.5). CISA added it to the Known Exploited Vulnerabilities catalog on 2023-09-25: attackers are using it, so patch it first.

What it is

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.

Weakness: CWE-295.

Severity

5.5 medium

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

Exploited (CISA KEV)

Yes, since Sep 25, 2023

Federal due date Oct 16, 2023

EPSS, next 30 days

13%

Higher than 96% of scored CVEs

How it can be exploited

Attack vector
Local
Attack complexity
Low
Privileges required
None
User interaction
Required
Scope
Unchanged
Confidentiality impact
None
Integrity impact
High
Availability impact
None

What CISA says to do

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

Affected products

iOS and iPadOS, macOS. NVD's record lists the exact affected versions.

References

Questions

Is CVE-2023-41991 being exploited?

Yes. CISA added CVE-2023-41991 to its Known Exploited Vulnerabilities catalog on 2023-09-25, with a federal remediation due date of 2023-10-16.

How do I fix CVE-2023-41991?

CISA's required action: Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.

From NVD, CISA KEV, FIRST EPSS and OSV.dev, checked . Status on NVD: Analyzed. The description is NVD's text, quoted as published.

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