Apple iOS, iPadOS, and macOS Out-of-Bounds Write Vulnerability
Apple — iOS and iPadOS
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.
10.0
22.0%
Vector breakdown
- Attack vector
- Network
- Attack complexity
- Low
- Privileges required
- None
- User interaction
- None
- Scope
- Changed
- Confidentiality
- High
- Integrity
- High
- Availability
- High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H
- Published
- Aug 21, 2025
- Modified
- Jun 17, 2026
- Added to KEV
- Aug 21, 2025
- Federal patch due
- Sep 11, 2025
CISA 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.
Weakness classification
Affected packages
Proof-of-concept & exploitation references
7 foundWeaponization
Public repositories whose name or description references CVE-2025-43300, found via a live GitHub search at request time. These are community-sourced signals, not a verified working exploit - cross-check each one before relying on it, and treat higher star counts and recent activity as (weak) corroboration, not proof.
- hunters-sec/CVE-2025-43300★ 119
This is POC for IOS 0click CVE-2025-43300
updated Sep 22, 2026
- JGoyd/Glass-Cage-iOS18-CVE-2025-24085-CVE-2025-24201★ 42
Glass Cage is a zero-click PNG-based RCE chain in iOS 18.2.1, bypassing LockDown mode protection by exploiting ImageIO (CVE-2025-43300), then WebKit(CVE-2025-24201) and Core Media(CVE-2025-24085) to achieve sandbox escape, kernel-level access, and device bricking. Triggered via iMessage, it enables full compromise with no user interaction.
updated Oct 16, 2026
- PwnToday/CVE-2025-43300★ 7
CVE-2025-43300: iOS/macOS DNG Image Processing Memory Corruption
updated Sep 10, 2026
- danielw98/zero-click-exploit-analysis★ 5
CVE-2025-55177 + CVE-2025-43300: reverse-engineering the WhatsApp-ImageIO zero-click iOS chain, with interactive labs.
updated Sep 27, 2026
- ticofookfook/CVE-2025-43300★ 4
updated Sep 10, 2026
- Dark-life944/CVE-2025★ 1
This is POC for IOS 0click CVE-2025-43300
updated Oct 14, 2025
- veniversum/cve-2025-43300★ 0
updated Sep 18, 2025
References
Frequently asked questions
What is CVE-2025-43300?
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.
How severe is CVE-2025-43300?
CVE-2025-43300 has a CVSS base score of 10.0 out of 10 (CVSS 3.1).
Is CVE-2025-43300 actively exploited in the wild?
Yes. CVE-2025-43300 is listed in the CISA Known Exploited Vulnerabilities (KEV) catalog, added Aug 21, 2025, meaning CISA has confirmed evidence of active exploitation.
What is the EPSS score for CVE-2025-43300?
22.0% - meaning FIRST.org's EPSS model estimates a 22.0% probability this vulnerability will be exploited in the wild within 30 days (97% percentile among all scored CVEs).
Is there exploit tooling available for CVE-2025-43300?
We found 7 public GitHub repositories referencing CVE-2025-43300, though none matched a known Nuclei template or Metasploit module at last check. Review each one before relying on it - see the proof-of-concept section above.
What type of vulnerability is CVE-2025-43300?
CVE-2025-43300 is classified under CWE-787 (CWE-787 Out-of-bounds Write).
Cross-checked against
Impactr finds and proves whether CVE-2025-43300 - or flaws like it - are actually reachable in your own web apps and APIs, with a reproducible exploit as evidence.
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