CVE-2025-43300: Apple exploited

Advisory generated from the CVE record, CISA, Exploit Observer and VEDAS: what it is, whether it is exploited, who is affected, and how to fix and detect it.

What it is

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.

Description quoted from the CVE record (assigned by apple, published 2025-08-21).

Weakness: CWE-787 Out-of-bounds Write

How it can be exploited

Exploitable over the network with low attack complexity needing no privileges and no user interaction. Impact: 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

CISA assessment (SSVC): CISA assesses exploitation as active. Automatable: yes. Technical impact: total.

On CISA KEV since: 2025-08-21
US federal deadline: 2025-09-11
Ransomware use: Not known

Public exploit evidence (Exploit Observer)

Also known as: BDU:2025-10189, CNNVD-202508-2661, CNVD-2025-19354, EUVD-2025-25409, EUVD-2025-26214, GHSA-cpwx-wfp4-x368, GHSA-f7wf-m2qg-r9rx

VEDAS cluster: VEDAS:ARTISAN

Exploit Observer links 6 pieces of public exploit code or detection modules that name this CVE or one of its aliases.

Exploit code and modules (6)

Code that names this CVE. A repository can be a working exploit, a scanner, a fake or malware; read it before running anything.

Code repository: https://github.com/7amzahard/cve-2025-43300
Code repository: https://github.com/hunters-sec/cve-2025-43300
Code repository: https://github.com/pwntoday/cve-2025-43300
Code repository: https://github.com/pwntoday/cve-2025-43300-1day
Code repository: https://github.com/ticofookfook/cve-2025-43300
Code repository: https://github.com/veniversum/cve-2025-43300

Research and write-ups (6)

Research or write-up: https://blog.quarkslab.com/patch-analysis-of-Apple-iOS-CVE-2025-43300.html
Research or write-up: https://onejailbreak.com/blog/cve-2025-43300-fix-ios
Research or write-up: https://pwn.guide/free/hardware/cve202543300
Research or write-up: https://socprime.com/blog/cve-2025-43300-zero-day-vulnerability
Research or write-up: https://socprime.com/blog/cve-2025-43300-zero-day-vulnerability/?utm_source=chatgpt.com
Research or write-up: https://www.msuiche.com/posts/detecting-cve-2025-43300-a-deep-dive-into-apples-dng-processing-vulnerability

Vulnerability databases and vendor advisories (9)

Catalogue entries, not exploit evidence.

Vulnerability database or vendor advisory: https://euvd.enisa.europa.eu/enisa/EUVD-2025-25409
Vulnerability database or vendor advisory: https://euvd.enisa.europa.eu/enisa/EUVD-2025-26214
Vulnerability database or vendor advisory: https://github.com/advisories/GHSA-cpwx-wfp4-x368
Vulnerability database or vendor advisory: https://github.com/advisories/GHSA-f7wf-m2qg-r9rx
Vulnerability database or vendor advisory: https://nvd.nist.gov/vuln/detail/CVE-2025-43300
Vulnerability database or vendor advisory: https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2025-43300
Vulnerability database or vendor advisory: https://www.cnnvd.org.cn/home/globalSearch?keyword=CNNVD-202508-2661
Vulnerability database or vendor advisory: https://www.cnvd.org.cn/flaw/show/CNVD-2025-19354
Vulnerability database or vendor advisory: https://www.tenable.com/cve/CVE-2025-43300

News (3)

449 more references returned by Exploit Observer did not name this CVE or an alias, so they are left out.

VEDAS data as of 2026-11-01T17:12 UTC; fetched 2026-11-02.

Live scores

EPSS: 0.652
very likely to be attacked soon
VEDAS: 0.982
strong exploit evidence
On CISA KEV: Yes, since 2025-08-21
Detection rule: None yet

EPSS (chance of attack)

VEDAS (exploit evidence)

Thin horizontal line: the “likely” (EPSS 0.10) or “strong” (VEDAS 0.90) threshold. Shaded “no data” areas are periods when cve-scores did not publish.

Who is affected

Product	Affected	Not affected
Apple iOS and iPadOS	before 15.8.5 before 16.7.12 before 18.6.2	Not stated
Apple iPadOS	before 17.7.10	Not stated
Apple macOS	before 13.7.8 before 14.7.8 before 15.6.1	Not stated

Version ranges exactly as the CVE record states them. “Before X” means X is the first fixed version.

Exploit Observer also maps it to: apple ipados, apple iphone_os, apple macos.

How to fix it

Fixed versions stated in the CVE record: 15.8.5, 16.7.12, 18.6.2, 17.7.10, 13.7.8, 14.7.8, 15.6.1.

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.

Vendor guidance:

How to detect it

There is no open VEDAS detection rule for this bug yet. It is listed on the detection gaps page if CISA has confirmed attacks.

Advisories on this CVE

Apple 2025 zero-days (21 Aug 2025)

References

Exploits and technical analysis

https://github.com/cisagov/vulnrichment/issues/201 (issue-tracking)

Government sources

https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2025-43300 (government-resource)

Other references

Other databases

Where this comes from

This advisory is generated automatically by VEDAS from: CVE.org record, CISA KEV, cve-scores (EPSS and VEDAS), Exploit Observer. Text in quotes is reproduced from the source; everything else is a fixed template filled with source fields. Nothing here is written by a language model. Check the vendor advisory before acting, and read how VEDAS and Exploit Observer work, and their limits.

CVE-2025-43300: Apple iOS, iPadOS, and macOS Out-of-Bounds Write Vulnerability