Buffer overflow in Apple macOS
CVE-2026-43761
An out-of-bounds write issue was addressed with improved bounds checking. This issue is fixed in macOS Sequoia 15.7.8, macOS Sonoma 14.8.8, macOS Tahoe 26.6. Mounting a malicious disk image may cause unexpected system termination.
Vulnerability class: Buffer Overflow
Published · last modified .
CVSS v3 metric
CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H.
EPSS exploit prediction
EPSS: 0.004 (34.6th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 35th percentile — 34.6% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.004 · newest: 0.004 · change: 0.000
Affected products
Weakness classification (CWE)
References
- support.apple.com/en-us/128067 (Release Notes, Vendor Advisory)
- support.apple.com/en-us/128071 (Release Notes, Vendor Advisory)
- support.apple.com/en-us/128072 (Release Notes, Vendor Advisory)
Frequently asked questions
- What is CVE-2026-43761?
- CVE-2026-43761 is a medium-severity vulnerability in Apple macOS, classified under Out-of-bounds Write. CVSS score: 6.5/10. Published 2026-09-14.
- How severe is CVE-2026-43761?
- Medium severity. CVSS v3 base score is 6.5 out of 10.