Vulnerability details
CVE-2023-43000
Actively exploited
Apple SafariApple iOS and iPadOSApple macOS
CVSS 3.1
8.8High
Remedy
Required action (CISA): Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable. (due: 2026-03-26)
Versions not listed as affected in the CVE record:
- macOS — version 13.5 and later
- iOS and iPadOS — version 16.6 and later
- Safari — version 16.6 and later
- iOS and iPadOS — version 15.8.7 and later
Official description
A use-after-free issue was addressed with improved memory management. This issue is fixed in macOS Ventura 13.5, iOS 16.6 and iPadOS 16.6, Safari 16.6, iOS 15.8.7 and iPadOS 15.8.7. Processing maliciously crafted web content may lead to memory corruption.
CVSS scores
| Score | Version | Source | Vector |
|---|---|---|---|
| 8.8High | 3.1 | CISA ADP / Vulnrichment (CISA-ADP) | CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H |
Affected products
| Vendor | Product | Versions | Source |
|---|---|---|---|
| Apple | Safari | v < 16.6 | CVEProject cvelistV5 (CNA) |
| Apple | iOS and iPadOS | v < 16.6 | CVEProject cvelistV5 (CNA) |
| Apple | iOS and iPadOS | v < 15.8.7 | CVEProject cvelistV5 (CNA) |
| Apple | macOS | v < 13.5 | CVEProject cvelistV5 (CNA) |
References and advisories
6- https://support.apple.com/en-us/120331
- https://support.apple.com/en-us/120338
- https://support.apple.com/en-us/120324
- https://support.apple.com/en-us/126632
- https://cloud.google.com/blog/topics/threat-intelligence/coruna-powerful-ios-exploit-kit third-party-advisory
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2023-43000 government-resource
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Details
- Published
- 2025-11-05
- Last updated
- 2026-09-21
- State
- Published
- Assigner (CNA)
- apple
- Kolun priority
- 86 · Critical
CISA KEV catalog
- Date added
- 2026-03-05
- Due date
- 2026-03-26
- Used in ransomware
- Unknown
Exploit prediction (EPSS)
4.04%
Probability of exploitation in 30 days
90.7%
Percentile (among all CVEs)
SSVC assessment (CISA)
- Automatable
- No
- Exploitation
- Active
- Technical impact
- Total
Weaknesses (CWE)
- CWE-416Use After Free