Home/CVE/Apple iOS, iPadOS, and macOS Out-of-Bounds Write Vulnerability
CVE

CVE-2025-43300

Apple iOS, iPadOS, and macOS Out-of-Bounds Write Vulnerability

An out-of-bounds write issue was addressed with improved bounds checking. This issue is fixed in iOS 15.8.5 and iPadOS 15.8.5, iOS 16.7.12 and iPadOS 16.7.12, iOS 18.6.2 and iPadOS 18.6.2, iPadOS 17.7.10, macOS Sequoia 15.6.1, macOS Sonoma 14.7.8, macOS Ventura 13.7.8. Processing a malicious image file may result in memory corruption.

Apple is aware of a report that this issue may have been exploited in an extremely sophisticated attack against specific targeted individuals.

CRITICAL · CVSS 10 ⚠ CISA KEV EPSS 0.04417
Act now
  • Listed on CISA KEV (known exploited in the wild)
  • SSVC exploitation status: active
  • Public exploit or PoC is available
  • SSVC automatable: yes - attacks can be scripted at scale
  • CVSS base score ≥ 7.0
Sigma rules8 YARA rules0
⬢

Required Remediation

Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.

⬡

Weakness Classification

CWE-787Out-of-bounds Write
▤

Affected Products & Versions

10
apple ipados< 15.8.5
apple ipados>= 16.0 and < 16.7.12
apple ipados>= 17.0 and < 17.7.10
apple ipados>= 18.0 and < 18.6.2
apple iphone os< 15.8.5
apple iphone os>= 16.0 and < 16.7.12
apple iphone os>= 17.0 and < 18.6.2
apple macos>= 13.0 and < 13.7.8
⚠

Public Exploits & PoCs

1
pocgithub.com · CVE-2025-43300.mdgithub.com
◈

Sigma Hunt Rules

8
Exact rules name this CVE ID. Product rules name an affected product in their title. Related rules cover techniques used by actors who exploited this CVE. Showing the most relevant matches; the complete related set is on the full drill-down.
producthighSuspicious Microsoft Office Child Process - MacOS
producthighRemote Access Tool - Renamed MeshAgent Execution - MacOS
producthighBinary Padding - MacOS
productmediumSuspicious Execution via macOS Script Editor
productmediumSystem Information Discovery Via Sysctl - MacOS
productmediumNew File Exclusion Added To Time Machine Via Tmutil - MacOS
▣

Scoring & Timeline

10
CRITICAL · CVSS v3.1 · product-security@apple.com
View on NVD
Attack Vector
Network Adjacent Local Physical
Attack Complexity
Low High
Privileges Required
None Low High
User Interaction
None Required
Scope
Unchanged Changed
Confidentiality
None Low High
Integrity
None Low High
Availability
None Low High
Published to NVD21 Aug 2025 · 01:15 AM
CVSS VectorCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H
SSVC triage · cisa-vulnrichment
Exploitation
active
Automatable
yes
Technical impact
total
SSVC asks the questions that actually drive patch urgency: is it being exploited, can attacks be automated, and how total is the impact.
⚑

Vendor Advisories

8
apple-security125141
apple-security125142
cisaKEV-CVE-2025-43300
apple-security124925
apple-security124926
🔗

References & Sources

5
Source URLs (vendor pages, mailing lists, write-ups). Exploit/PoC links are in their own section above to avoid duplication.
http://seclists.org/fulldisclosure/2025/Sep/10Mailing ListThird Party Advisory
http://seclists.org/fulldisclosure/2025/Sep/14Mailing ListThird Party Advisory
http://seclists.org/fulldisclosure/2025/Sep/52Mailing ListThird Party Advisory
https://github.com/cisagov/vulnrichment/issues/201Issue Tracking
https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2025-43300US Government Resource
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