CVE-2025-43520
medium CISA KEVApple Multiple Products Classic Buffer Overflow Vulnerability
Vendor / product: Apple — Multiple Products
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.
CVSS
5.5
5.5 (CVSS v3.1)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H Severity source: NVD CVSS v3.1 (nvd@nist.gov)
Timeline (UTC)
Published: 2025-12-12 21:15
Modified: 2026-10-07 11:10
NVD status: Analyzed
Last synced 1 day ago
Verified against the source API 2026-10-27 07:07 UTC
Exploitation
Listed in CISA KEV
Added 2026-03-20 · due 2026-04-03
Known ransomware use: Unknown
Required action (CISA)
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
apple / ipados <18.7.2, 26.0
apple / iphone_os <18.7.2, 26.0
apple / macos ≥14.0 <14.8.2, ≥15.0 <15.7.2, 26.0
apple / tvos <26.1
apple / visionos <26.1
apple / watchos <26.1
Weakness classification (CWE)
Source: NVD / CISA. “NVD-CWE-Other” and “NVD-CWE-noinfo” mean NVD could not assign a specific weakness.
Mitigation & advisories
Vendor advisory: https://support.apple.com/en-us/125632
Vendor advisory: https://support.apple.com/en-us/125633
Vendor advisory: https://support.apple.com/en-us/125634
Vendor advisory: https://support.apple.com/en-us/125635
Vendor advisory: https://support.apple.com/en-us/125636
Vendor advisory: https://support.apple.com/en-us/125637
Vendor advisory: https://support.apple.com/en-us/125638
Vendor advisory: https://support.apple.com/en-us/125639
References
- https://support.apple.com/en-us/125632 product-security@apple.com
- https://support.apple.com/en-us/125633 product-security@apple.com
- https://support.apple.com/en-us/125634 product-security@apple.com
- https://support.apple.com/en-us/125635 product-security@apple.com
- https://support.apple.com/en-us/125636 product-security@apple.com
- https://support.apple.com/en-us/125637 product-security@apple.com
- https://support.apple.com/en-us/125638 product-security@apple.com
- https://support.apple.com/en-us/125639 product-security@apple.com
- https://cloud.google.com/blog/topics/threat-intelligence/darksword-ios-exploit-chain/ 134c704f-9b21-4f2e-91b3-4a467353bcc0
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2025-43520 134c704f-9b21-4f2e-91b3-4a467353bcc0
Data sources
CISA KEV — fetched 2026-10-27 06:50 UTC · record ↗
NVD CVE API 2.0 — fetched 2026-10-27 07:07 UTC · record ↗