How severe is CVE-2023-41991?

CVE-2023-41991 has a CVSS 3.x base score of 5.5, rated medium severity. It is exploitable over local access with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is none, integrity high, and availability none.

Is CVE-2023-41991 being actively exploited?

Yes. CVE-2023-41991 is on CISA's Known Exploited Vulnerabilities (KEV) catalog, added on 2023-09-25, which means active exploitation has been confirmed. It should be prioritised for remediation.

What products are affected by CVE-2023-41991?

CVE-2023-41991 primarily affects Apple Ipados. In total, 5 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2023-41991?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Because this CVE is known to be actively exploited, treat remediation as urgent — CISA KEV typically sets a short remediation deadline.

Does CVE-2023-41991 have an EU (EUVD) identifier?

Yes. CVE-2023-41991 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2023-46450. It is also flagged as exploited in the EUVD (since 2023-09-25).

When was CVE-2023-41991 published?

CVE-2023-41991 was published on 2023-09-21 and last updated on 2026-06-17.

CVE-2023-41991

CVE-2023-41991 is a medium-severity vulnerability in Apple Ipados with a CVSS 3.x base score of 5.5. It is listed in CISA's Known Exploited Vulnerabilities (KEV) catalog, confirming it has been exploited in the wild (added 2023-09-25). The underlying weakness is classified as CWE-295.

Key facts

Severity: Medium (CVSS 3.x base score 5.5)
EPSS exploit prediction: 5% (90th percentile)
Actively exploited: Yes — listed in CISA KEV (added 2023-09-25)
EU (EUVD) id: EUVD-2023-46450
EU exploitation: Flagged exploited in the ENISA EU Vulnerability Database (since 2023-09-25)
Weakness: CWE-295
Affected product: Apple Ipados
Published: 2023-09-21
Last modified: 2026-06-17

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.

Frequently asked questions

What is CVE-2023-41991?: 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.
How severe is CVE-2023-41991?: CVE-2023-41991 has a CVSS 3.x base score of 5.5, rated medium severity. It is exploitable over local access with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is none, integrity high, and availability none.
Is CVE-2023-41991 being actively exploited?: Yes. CVE-2023-41991 is on CISA's Known Exploited Vulnerabilities (KEV) catalog, added on 2023-09-25, which means active exploitation has been confirmed. It should be prioritised for remediation.
What products are affected by CVE-2023-41991?: CVE-2023-41991 primarily affects Apple Ipados. In total, 5 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2023-41991?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Because this CVE is known to be actively exploited, treat remediation as urgent — CISA KEV typically sets a short remediation deadline.
Does CVE-2023-41991 have an EU (EUVD) identifier?: Yes. CVE-2023-41991 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2023-46450. It is also flagged as exploited in the EUVD (since 2023-09-25).
When was CVE-2023-41991 published?: CVE-2023-41991 was published on 2023-09-21 and last updated on 2026-06-17.

References

Affected products (5)

cpe:2.3:o:apple:ipados:*:*:*:*:*:*:*:*
cpe:2.3:o:apple:ipados:17.0:*:*:*:*:*:*:*
cpe:2.3:o:apple:iphone_os:*:*:*:*:*:*:*:*
cpe:2.3:o:apple:iphone_os:17.0:*:*:*:*:*:*:*
cpe:2.3:o:apple:macos:*:*:*:*:*:*:*:*

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