CISA KEV catalog
Confirmed active exploitation.
Listed in CISA's catalog of Known Exploited Vulnerabilities: attackers are using it in real attacks. Patch it with priority.
- Name
- Apple iOS, iPadOS, and watchOS Out-of-Bounds Write Vulnerability
- Added to catalog
- Remediation due date (US federal)
- Required action
- Apply updates per vendor instructions.
Description
An out-of-bounds write issue was addressed with improved bounds checking. This issue is fixed in iOS 13.5 and iPadOS 13.5, iOS 12.4.7, watchOS 6.2.5. Processing a maliciously crafted mail message may lead to unexpected memory modification or application termination.
Affected products
apple: ipados; apple: iphone os; apple: watchos
References7
- support.apple.com/HT211168 Release NotesVendor Advisory
- support.apple.com/HT211169 Release NotesVendor Advisory
- support.apple.com/HT211175 Release NotesVendor Advisory
- support.apple.com/HT211168 Release NotesVendor Advisory
- support.apple.com/HT211169 Release NotesVendor Advisory
- support.apple.com/HT211175 Release NotesVendor Advisory
- www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=… US Government Resource
Metrics
- CVSS 3.1
-
8.8
HIGH
Score source: NVD
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H - EPSS — exploit probability
- 2% percentile: 84 · as of 2 November 2026
- CWE
- CWE-787