Medium severity · published Aug 17, 2026
CVE-2026-43667
A reachable assertion was addressed with improved input validation
6.5
CVSS
0.4%
EPSS
No
On KEV
Description
A reachable assertion was addressed with improved input validation. This issue is fixed in iOS 18.7.10 and iPadOS 18.7.10, iOS 26.5 and iPadOS 26.5, macOS Tahoe 26.5, visionOS 26.5, watchOS 26.5. An attacker in a privileged network position may be able to cause a denial-of-service.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
Required
Confidentiality
None
Integrity
None
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.4% · higher than 36% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
MA
macOS · Apple
before 26.5 · source: vendor
IO
iOS · Apple
before 18.7.10 · source: NVD
IA
iOS and iPadOS · Apple
before 18.7.10; before 26.5 · source: vendor
VI
visionOS · Apple
before 26.5 · source: vendor
WA
watchOS · Apple
before 26.5 · source: vendor
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-43667
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-43667
support.apple.com
https://support.apple.com/en-us/127110
support.apple.com
https://support.apple.com/en-us/127115
support.apple.com
https://support.apple.com/en-us/127119
support.apple.com
https://support.apple.com/en-us/127120
Vendor Advisory
https://support.apple.com/en-us/148287
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