CVE-2026-84543
highAn out-of-bounds access issue was addressed with improved bounds checking.
Vendor / product: Apple — macos
An out-of-bounds access issue was addressed with improved bounds checking. This issue is fixed in macOS Golden Gate 27, macOS Sequoia 15.8, macOS Tahoe 26.7. Connecting to a malicious SMB server may cause unexpected system termination or corrupt kernel memory.
CVSS
7.5
7.5 (CVSS v3.1)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N Severity source: NVD CVSS v3.1 (134c704f-9b21-4f2e-91b3-4a467353bcc0)
Timeline (UTC)
Published: 2026-09-14 21:17
Modified: 2026-09-16 14:47
NVD status: Analyzed
Last synced 1 day ago
Verified against the source API 2026-10-27 06:53 UTC
Exploitation
Not listed in CISA KEV (as of last catalog sync)
Absence from KEV does not mean a CVE is not exploited. Exploitation status: unknown (no authoritative evidence in our sources).
Affected products
apple / macos ≥15.0 <15.8, ≥26.0 <26.7
Weakness classification (CWE)
Source: NVD / CISA. “NVD-CWE-Other” and “NVD-CWE-noinfo” mean NVD could not assign a specific weakness.
Mitigation & advisories
Vendor advisory: https://support.apple.com/en-us/149035
Vendor advisory: https://support.apple.com/en-us/149042
Vendor advisory: https://support.apple.com/en-us/149043
References
- https://support.apple.com/en-us/149035 product-security@apple.com
- https://support.apple.com/en-us/149042 product-security@apple.com
- https://support.apple.com/en-us/149043 product-security@apple.com
Data sources
NVD CVE API 2.0 — fetched 2026-10-27 06:53 UTC · record ↗