CVE-2025-43529 (GCVE-0-2025-43529)

Vulnerability from cvelistv5 – Published: 2025-12-17 20:46 – Updated: 2026-04-02 18:18
VLAI CISA KEVIntel
Summary
A use-after-free issue was addressed with improved memory management. This issue is fixed in Safari 26.2, iOS 18.7.3 and iPadOS 18.7.3, iOS 26.2 and iPadOS 26.2, macOS Tahoe 26.2, tvOS 26.2, visionOS 26.2, watchOS 26.2. Processing maliciously crafted web content may lead to arbitrary code execution. Apple is aware of a report that this issue may have been exploited in an extremely sophisticated attack against specific targeted individuals on versions of iOS before iOS 26. CVE-2025-14174 was also issued in response to this report.
Severity
8.8 (High)
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
SSVC
Exploitation: active Automatable: no Technical Impact: total
CISA Coordinator (v2.0.3)
CWE
  • Processing maliciously crafted web content may lead to arbitrary code execution. Apple is aware of a report that this issue may have been exploited in an extremely sophisticated attack against specific targeted individuals on versions of iOS before iOS 26. CVE-2025-14174 was also issued in response to this report.
  • CWE-416 - Use After Free
Assigner
References
Impacted products
Vendor Product Version
Apple Safari Affected: 0 , < 26.2 (custom)
Create a notification for this product.
Apple iOS and iPadOS Affected: 0 , < 18.7.3 (custom)
Affected: 0 , < 26.2 (custom)
Create a notification for this product.
Apple macOS Affected: 0 , < 26.2 (custom)
Create a notification for this product.
Apple tvOS Affected: 0 , < 26.2 (custom)
Create a notification for this product.
Apple visionOS Affected: 0 , < 26.2 (custom)
Create a notification for this product.
Apple watchOS Affected: 0 , < 26.2 (custom)
Create a notification for this product.
CISA
Known Exploited Vulnerability - GCVE BCP-07 Compliant
KEV entry ID: 33ca5769-0a07-497a-a3a3-2d09143e9fd2

Vulnerability ID: CVE-2025-43529

Status: Confirmed

Status Updated: 2025-12-15 00:00 UTC

Exploited: Yes

Timestamps
First Seen: 2025-12-15
Asserted: 2025-12-15
Scope
Notes: KEV entry: Apple Multiple Products Use-After-Free WebKit Vulnerability | Affected: Apple / Multiple Products | Description: Apple iOS, iPadOS, macOS, and other Apple products contain a use-after-free vulnerability in WebKit. Processing maliciously crafted web content may lead to memory corruption. This vulnerability could impact HTML parsers that use WebKit, including but not limited to Apple Safari and non-Apple products which rely on WebKit for HTML processing. | 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. | Due date: 2026-01-05 | Known ransomware campaign use (KEV): Unknown | Notes (KEV): https://support.apple.com/en-us/125884 ; https://support.apple.com/en-us/125892 ; https://support.apple.com/en-us/125885 ; https://support.apple.com/en-us/125886 ; https://support.apple.com/en-us/125889 ; https://nvd.nist.gov/vuln/detail/CVE-2025-43529
Evidence

Type: Vendor Report

Signal: Successful Exploitation

Confidence: 80%

Source: cisa-kev

Details
Cwes CWE-416
Feed CISA Known Exploited Vulnerabilities Catalog
Product Multiple Products
Due Date 2026-01-05
Date Added 2025-12-15
Vendorproject Apple
Vulnerabilityname Apple Multiple Products Use-After-Free WebKit Vulnerability
Knownransomwarecampaignuse Unknown
References
Created: 2026-02-02 12:25 UTC | Updated: 2026-02-06 07:17 UTC
KEVIntel
Known Exploited Vulnerability - GCVE BCP-07 Compliant
KEV entry ID: c98442e6-e3d8-4b87-95a1-6e45be8bee53

Vulnerability ID: CVE-2025-43529

Status: Confirmed

Status Updated: 2026-06-01 10:46 UTC

Exploited: Yes

Timestamps
First Seen: 2026-06-01
Asserted: 2026-06-01
Scope
Notes: KEVIntel entry: A use-after-free issue was addressed with improved memory management. This issue is fixed in Safari 26.2, iOS 18.7.3 and iPadOS 18.7.3, iOS 26.2... | Affected: Apple / Safari, iOS and iPadOS, macOS, tvOS, visionOS, watchOS | CVSS: 8.8 (HIGH) | EPSS: 0.07997 | Used in malware: unknown | Not yet in CISA KEV: False
Evidence

Type: Public Report

Signal: Successful Exploitation

Confidence: 70%

Source: kevintel

Details
Feed KEVIntel (kevintel.com)
Title A use-after-free issue was addressed with improved memory management. This issue is fixed in Safari 26.2, iOS 18.7.3 and iPadOS 18.7.3, iOS 26.2...
Vendor Apple
Product Safari, iOS and iPadOS, macOS, tvOS, visionOS, watchOS
Added Date 2026-06-01T10:46:30.893Z
Cvss Score 8.8
Epss Score 0.07997
Cvss Severity HIGH
Epss Percentile 0.94016
Used In Malware unknown
Ahead Of Cisa Kev 
{
  "count": 1,
  "unit": "day"
}
Not Yet In Cisa Kev False
References
Created: 2026-06-23 14:03 UTC | Updated: 2026-06-23 14:03 UTC
Show details on NVD website
To clipboard 

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Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

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Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.


Detection rules are retrieved from Rulezet.