Vulnerability details
CVE-2026-39877
Apple iOS and iPadOSApple macOSApple tvOSApple visionOSApple watchOS
CVSS 3.1
7.8High
Official description
A memory corruption issue was addressed with improved memory handling. This issue is fixed in iOS 18.7.10 and iPadOS 18.7.10, iOS 26.5 and iPadOS 26.5, macOS Sequoia 15.7.8, macOS Sonoma 14.8.8, macOS Tahoe 26.5, tvOS 26.5, visionOS 26.5, watchOS 26.5. An app may be able to disclose kernel memory.
CVSS scores
| Score | Version | Source | Vector |
|---|---|---|---|
| 7.8High | 3.1 | CISA ADP / Vulnrichment (CISA-ADP) | CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H |
Affected products
| Vendor | Product | Versions | Source |
|---|---|---|---|
| Apple | iOS and iPadOS | v < 18.7.10 | CVEProject cvelistV5 (CNA) |
| Apple | iOS and iPadOS | v < 26.5 | CVEProject cvelistV5 (CNA) |
| Apple | macOS | v < 14.8.8 | CVEProject cvelistV5 (CNA) |
| Apple | macOS | v < 15.7.8 | CVEProject cvelistV5 (CNA) |
| Apple | macOS | v < 26.5 | CVEProject cvelistV5 (CNA) |
| Apple | tvOS | v < 26.5 | CVEProject cvelistV5 (CNA) |
| Apple | visionOS | v < 26.5 | CVEProject cvelistV5 (CNA) |
| Apple | watchOS | v < 26.5 | CVEProject cvelistV5 (CNA) |
References and advisories
8- https://support.apple.com/en-us/127110
- https://support.apple.com/en-us/127115
- https://support.apple.com/en-us/127118
- https://support.apple.com/en-us/127119
- https://support.apple.com/en-us/127120
- https://support.apple.com/en-us/128071
- https://support.apple.com/en-us/128072
- https://support.apple.com/en-us/148287
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Details
- Published
- 2026-07-27
- Last updated
- 2026-08-25
- State
- Published
- Assigner (CNA)
- apple
Exploit prediction (EPSS)
0.17%
Probability of exploitation in 30 days
6.8%
Percentile (among all CVEs)
SSVC assessment (CISA)
- Automatable
- No
- Exploitation
- None
- Technical impact
- Total
Weaknesses (CWE)
- CWE-119Improper Restriction of Operations within the Bounds of a Memory Buffer