🟢 CVE-2025-43300

CVE-2025-43300 is an out-of-bounds write vulnerability in Apple's Image I/O framework affecting macOS, iOS, and iPadOS that requires user interaction to process a malicious image file. While actively exploited as a zero-day, it primarily affects client-side operating systems rather than internet-facing server applications.

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LOW_RISK
Risk Level
8.8
CVSS Score
NETWORK
Attack Vector
Execution
ATT&CK Tactic
T1203 — Exploitation for Client Execution
ATT&CK Technique
VERY_LOW
Deployment Risk
No
Ransomware

📋 Vulnerability Details

Data Source: CIRCL

Confidence: HIGH

Exploitation Method: USER_INTERACTION

CVE Published: 2025-08-21

Added to CISA KEV: 2025-08-21 0 DAY BETWEEN CVE AND KEV

🎯 Recommendations:

🔍 Web Intelligence (Kagi · 2025-09-06)

CVE-2025-43300 is an actively exploited zero-day vulnerability that affects Apple's Image I/O framework, which handles image processing across iOS, iPadOS, and macOS platforms [1][2]. Here's what is known about its exploitation:

  • Internet-facing applications or services: While not directly affecting internet-facing *services*, the vulnerability impacts devices that process images, making it potentially exploitable via malicious image files received over the internet [3].
  • Active exploitation: CVE-2025-43300 is being actively exploited in the wild [2].
  • Attack vectors and exploitation methods: The vulnerability is an out-of-bounds write issue triggered by specially crafted images, leading to memory corruption [2]. It can be triggered when a device processes a specially crafted image file [2]. The complexity of modern file formats, particularly when multiple standards interact (e.g., TIFF containers with JPEG data), can create unexpected attack surfaces [4].
  • Targeted attacks: This vulnerability has been used in "extremely sophisticated" and highly targeted attacks against specific individuals [5][3].
  • CISA Known Exploited Vulnerabilities (KEV) status: CISA has warned of the active exploitation of this zero-day vulnerability and has added it to its Known Exploited Vulnerabilities Catalog [1].
  • Technical details: CVE-2025-43300 represents a serious security flaw within Apple’s Image I/O framework [1]. It is a memory corruption issue that can be triggered by processing a specially crafted image file [2].

Sources

  1. CISA Warns of Actively Exploited 0-Day Vulnerability in Apple iOS...

    The vulnerability, catalogued as CVE-2025-43300, represents a serious security flaw within Apple’s Image I/O framework, which handles image processing across iOS, iPadOS, and macOS platforms.

  2. Apple Zero-Day Vulnerability CVE-2025-43300: What You Need to...

    The flaw, identified as CVE-2025-43300, is already being actively exploited in highly targeted attacks. The patches, delivered as iOS 18.6.2 and iPadOS 18.6.2, correct a memory corruption issue that can be triggered when a device processes a specially crafted image file.

  3. CVE-2025-43300 Detail - NVD

    Missing: internet- facing…

  4. PoC Exploit and Technical Analysis Published for Apple 0-Day RCE ...

    CVE-2025-43300 represents a continuation of Apple’s ongoing challenges with image processing security. The vulnerability highlights how the complexity of modern file formats, particularly when multiple standards interact (TIFF containers with JPEG data), can create unexpected attack surfaces.

  5. About the security content of iOS 18.6.2 and iPadOS 18.6.2

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

Generated by PatchNow Intelligence System

Analysis based on CIRCL.LU data, Claude AI assessment, and MITRE ATT&CK framework

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