Affects widely used Apple OS family (iOS, macOS, tvOS, watchOS) with a high-severity kernel memory flaw that can disrupt organizations' user devices.
CVE-2026-43810
Kernel memory handling flaw in Apple OSes enabling remote crashes and memory corruption.
Is CVE-2026-43810 being exploited?
Not confirmed. CVE-2026-43810 does not appear in CISA's Known Exploited Vulnerabilities catalog, which records only exploitation that has been observed and reported publicly. That is evidence of absence of a report, not evidence the flaw is unattacked. EPSS currently estimates a 0.78% probability of exploitation in the next 30 days.
How severe is CVE-2026-43810?
CVE-2026-43810 is rated Critical with a CVSS score of 9.8. Severity describes how bad exploitation would be, not how likely it is: pair it with exploitation evidence before deciding what to patch first.
Is there a patch for CVE-2026-43810?
Yes. A fix has been recorded for CVE-2026-43810. The vendor advisory is the authority on the exact fixed version — apply it from there rather than from a summary.
What does CVE-2026-43810 affect?
CVE-2026-43810 affects iOS 26.6, iPadOS 26.6, macOS Sequoia 15.7.8, macOS Sonoma 14.8.8, and 4 further products or versions. Confirm the exact affected versions against the vendor advisory before deciding you are exposed.
What should I do about CVE-2026-43810?
Apply the listed OS updates on all Apple devices immediately.
Exploitation status reflects CISA's KEV catalog as we last synced it. Check the catalog directly.
Remote attacker can cause kernel memory corruption or unexpected system termination (DoS); may enable privilege escalation or code execution in some scenarios.
Immediate action required
- affected< 18.7.10
- affected< 26.6
- affected< 14.8.8
- affected< 15.7.8
- affected< 26.6
- affected< 26.6
- affected< 26.6
- affected< 26.6
As published in the CVE Program record. A version outside these ranges is not a statement that it is unaffected — vendors sometimes understate a range, and distribution-backported builds carry upstream numbers that do not reflect what was patched into them.