CVE-2025-43520
MediumExploitedPublic exploitA memory corruption issue was addressed with improved memory handling.
Published Dec 12, 2025 · Updated Oct 7, 2026
Key Facts
Patch immediately- CVE-2025-43520 is a medium-severity vulnerability (CVSS 5.5 v3.1) affecting Ipados (Apple), Iphone OS (Apple), macOS (Apple) and 4 more products.
- It is exploited in the wild, listed in CISA KEV, Industry KEV feed, CIRCL KEV, ENISA EUVD since Mar 18, 2026. Public exploit code is available.
- EPSS estimates a 0.4% probability of exploitation in the next 30 days.
- Fixed versions are available, including Ipados 18.7.2, Iphone OS 18.7.2, macOS 14.8.2.
- Brandefense priority: patch immediately, because it is listed as exploited in the wild.
CVSS v3.1
5.5
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
EPSS (30-day exploit likelihood)
0.4%
Higher than 35.3% of all scored CVEs
Exploited in the wild
Yes
4 catalog listings
Public exploit code
Available
Proof-of-concept or weaponized module
Get the full CVE-2025-43520 brief as a PDF
Every affected product and fixed release, exploitation status and a first 24 hours response checklist, emailed within minutes.
Description
A memory corruption issue was addressed with improved memory handling. This issue is fixed in iOS 18.7.2 and iPadOS 18.7.2, iOS 26.1 and iPadOS 26.1, macOS Sequoia 15.7.2, macOS Sonoma 14.8.2, macOS Tahoe 26.1, tvOS 26.1, visionOS 26.1, watchOS 26.1. A malicious application may be able to cause unexpected system termination or write kernel memory.
Known-Exploited Catalog Listings
| Catalog | Added | Remediation due | Ransomware use |
|---|---|---|---|
| CISA KEV | Mar 20, 2026 | Apr 3, 2026 | Not reported |
| Industry KEV feed | Mar 18, 2026 | Apr 3, 2026 | Not reported |
| CIRCL KEV | Mar 20, 2026 | Apr 3, 2026 | Not reported |
| ENISA EUVD | Mar 20, 2026 | n/a | Not reported |
Required action: Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.
Affected Products
14 affected entries in total| Product | Affected versions | Fixed in |
|---|---|---|
| IpadosApple | 26.0 | 18.7.2 |
| Iphone OSApple | 26.0 | 18.7.2 |
| macOSApple | 26.0 | 14.8.2 |
| tvOSApple | See advisory | 26.1 |
| visionOSApple | See advisory | 26.1 |
Patched Releases
Ipados
18.7.2
Iphone OS
18.7.2
macOS
14.8.2, 15.7.2, 26.1
tvOS
26.1
visionOS
26.1
watchOS
26.1
iOS and iPadOS
18.7.2, 26.1
Timeline
Publicly disclosed
Dec 12, 2025
Added to Industry KEV feed
Mar 18, 2026
Added to CISA KEV
Mar 20, 2026
Added to CIRCL KEV
Mar 20, 2026
Added to ENISA EUVD
Mar 20, 2026
Last updated
Oct 7, 2026
Weakness Type
- CWE-120 Buffer Copy without Checking Size of Input ('Classic Buffer Overflow')
References
- advisoryhttps://support.apple.com/en-us/125632
- advisoryhttps://support.apple.com/en-us/125633
- advisoryhttps://support.apple.com/en-us/125634
- advisoryhttps://support.apple.com/en-us/125635
- advisoryhttps://support.apple.com/en-us/125636
FAQ
Common Questions.
A memory corruption issue was addressed with improved memory handling.
Affected: Ipados (Apple) versions 26.0; Iphone OS (Apple) versions 26.0; macOS (Apple) versions 26.0, among others. The full list is in the CVE brief.
It is exploited in the wild, listed in CISA KEV, Industry KEV feed, CIRCL KEV, ENISA EUVD since Mar 18, 2026.
Yes. It was added on Mar 20, 2026 with a federal remediation due date of Apr 3, 2026.
Public exploit code is available.
Fixed versions are available, including Ipados 18.7.2, Iphone OS 18.7.2, macOS 14.8.2.
Brandefense priority: patch immediately, because it is listed as exploited in the wild.
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