Medium severity · published Oct 20, 2026
CVE-2026-86963
A denial-of-service issue was addressed with improved input validation
5.9
CVSS
0.3%
EPSS
No
On KEV
Description
A denial-of-service issue was addressed with improved input validation. This issue is fixed in iOS 26.7 and iPadOS 26.7, iOS 27 and iPadOS 27. An attacker in a privileged network position may be able to cause a denial-of-service.
CVSS vector
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
Attack vector
Network
Complexity
High
Privileges
None
User interaction
None
Confidentiality
None
Integrity
None
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.3% · higher than 27% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
IA
iOS and iPadOS · Apple
before 26.7; before 27 · source: vendor
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-86963
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-86963
support.apple.com
https://support.apple.com/en-us/149034
support.apple.com
https://support.apple.com/en-us/149041
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