CVE-2025-43300An 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…
- 10.0CriticalCVSS base score
- 63.2%Exploitation in 30 daysEPSS · top 0.8% of all CVEs
- YesKnown exploitedin CISA's KEV since 21 Aug 2025
- YesPublic exploitsa reference or SSVC says so
Description
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.
Exploited in the wild
CISA lists this vulnerability in its Known Exploited Vulnerabilities catalog as Apple iOS, iPadOS, and macOS Out-of-Bounds Write Vulnerability.
- Added
- 21 Aug 2025
- Fix due (US federal)
- 11 Sept 2025
- Used by ransomware
- Not known
Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.
ENISA's EU Vulnerability Database lists it as exploited, from CISA's KEV, since 21 Aug 2025.
Public exploit
An exploit or proof of concept is public: anyone can try it against an unpatched system. CISA's SSVC rates its exploitation: it is being exploited.
Timeline
ID reserved
By apple
- 4 months later
· 4 months later
Published
Added to CISA KEV
Known exploited in the wild
- 7 months later
· 7 months later
Record updated
Changes after publication (a new score, a public exploit, EPSS crossing 1, 10 or 50 %, leaving KEV) are kept since November 2026; earlier ones are not known.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| CISA-ADPADP (enrichment) | 3.1 | Critical10.0 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H |
| NVDNVD · Analyzed | 3.1 | Critical10.0 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H |
- EPSS (exploitation in 30 days)
- 63.2% · top 0.8% of all CVEs (14 Nov 2026)
- CISA SSVC
- Exploitation: active · Automatable: yes · Technical impact: total
The list uses the assigner's score when there is one, then CISA's, then NVD's: Critical 10.0.
Affected products
References
References13
- https://support.apple.com/en-us/124925 (opens in a new tab)
- https://support.apple.com/en-us/124926 (opens in a new tab)
- https://support.apple.com/en-us/124927 (opens in a new tab)
- https://support.apple.com/en-us/124928 (opens in a new tab)
- https://support.apple.com/en-us/124929 (opens in a new tab)
- https://support.apple.com/en-us/125141 (opens in a new tab)
- https://support.apple.com/en-us/125142 (opens in a new tab)
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2025-43300 (opens in a new tab)government-resource
- https://github.com/cisagov/vulnrichment/issues/201 (opens in a new tab)issue-tracking
- https://github.com/b1n4r1b01/n-days/blob/main/CVE-2025-43300.md (opens in a new tab)
- http://seclists.org/fulldisclosure/2025/Sep/52 (opens in a new tab)
- http://seclists.org/fulldisclosure/2025/Sep/14 (opens in a new tab)
- http://seclists.org/fulldisclosure/2025/Sep/10 (opens in a new tab)
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- CISA KEV catalog (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- EUVD EUVD-2025-25409 (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisories (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://cveledger.app/cve/CVE-2025-43300)Record last updated .