Is CVE-2024-40867 in the CISA KEV catalog?

No. CVE-2024-40867 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2024-40867?

CVE-2024-40867 has a CVSS v3 base score of 9.6 (CRITICAL).

What is the EPSS score for CVE-2024-40867?

CVE-2024-40867 has an EPSS score of 0.70% (49th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2024-40867?

Upgrade ipados to 18.1 or later. Fixes are available for 2 affected products.

CVE & CISA-KEV Catalog

CVE-2024-40867

CRITICAL

9.6

CVSS v3

NVD

Description

A custom URL scheme handling issue was addressed with improved input validation. This issue is fixed in iOS 18.1 and iPadOS 18.1. A remote attacker may be able to break out of Web Content sandbox.

How to fix

Remediation Available

ipadosNVD

Affected:< 18.1Fixed in:18.1CVE-2024-40867derived from NVD

iphone osNVD

Affected:< 18.1Fixed in:18.1CVE-2024-40867derived from NVD

Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.

CVSS v3 Vector

Exploitability

Attack VectorNetwork

Attack ComplexityLow

Privileges RequiredNone

User InteractionRequired

ScopeChanged

Impact

ConfidentialityHigh

IntegrityHigh

AvailabilityHigh

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

Exploit Intelligence

0.70%probability of exploitation in 30 days

49thpercentile

Moderate risk: more likely to be exploited than 49% of all known CVEs.

References

Vendor Advisory1

support.apple.com

Other references1

seclists.org

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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2025-11-03.