Known exploited vulnerability
CVE-2023-43000
The short answer
CVE-2023-43000 affects Apple macOS and is rated high (CVSS 8.8). CISA added it to the Known Exploited Vulnerabilities catalog on 2026-03-05: attackers are using it, so patch it first.
What it is
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.
Weakness: CWE-416.
Severity
8.8 high
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Exploited (CISA KEV)
Yes, since Mar 5, 2026
Federal due date Mar 26, 2026
EPSS, next 30 days
4.0%
Higher than 91% of scored CVEs
How it can be exploited
- Attack vector
- Network
- Attack complexity
- Low
- Privileges required
- None
- User interaction
- Required
- Scope
- Unchanged
- Confidentiality impact
- High
- Integrity impact
- High
- Availability impact
- High
What CISA says to do
Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.
Affected products
macOS, iOS and iPadOS, Safari. NVD's record lists the exact affected versions.
References
- support.apple.com/en-us/120324 Release NotesVendor Advisory
- support.apple.com/en-us/120331 Release NotesVendor Advisory
- support.apple.com/en-us/120338 Release NotesVendor Advisory
- support.apple.com/en-us/126632 Release NotesVendor Advisory
- cloud.google.com/blog/topics/threat-intelligence/coruna-powerful-ios-exploit-kit ExploitThird Party Advisory
- www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2023-43000 US Government Resource
Questions
Is CVE-2023-43000 being exploited?
Yes. CISA added CVE-2023-43000 to its Known Exploited Vulnerabilities catalog on 2026-03-05, with a federal remediation due date of 2026-03-26.
How do I fix CVE-2023-43000?
CISA's 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.
From NVD, CISA KEV, FIRST EPSS and OSV.dev, checked . Status on NVD: Analyzed. The description is NVD's text, quoted as published.
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