CVE-2026-43750

CRITICAL 9.8 ALL-YEARS

Published 2026-07-27 · Last modified 2026-07-29 · apple · NVD: Analyzed

A buffer overflow 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. An app may be able to execute arbitrary code out of its sandbox or with certain elevated privileges.

ELEVATED IMPACT

Severe if exploited (CVSS 9.8), but no confirmed exploitation. Patch on a normal cadence.

Exploitation likelihood

0.8%chance of exploitation in 30 days · 55th percentile

○ In CISA KEV○ Catalogued PoC◆ SSVC: exploitation none, automatable no

Impact if exploited

9.8CVSS 3.1 · CRITICAL · ADP

ConfidentialityHigh
IntegrityHigh
AvailabilityHigh

What an attacker needs

✓Access: Reachable over the network — no local access needed
✓Privileges: No account or privileges required
✓User interaction: No user interaction needed
✓Complexity: No special conditions — reliably repeatable

✓ lowers the bar for an attacker · ⚠ raises it

Proof of concept

No public PoC is currently catalogued.

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Tracked sources are checked weekly for the full archive, including PoCs published after the original disclosure. A later release appears after a tracked source lists it and a refresh succeeds.

Affected

Vendors Apple

Products Macos

Weakness (CWE)

CWE-120: Buffer Copy without Checking Size of Input ('Classic Buffer Overflow')

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

References and research data (JSON)

Known Affected Software Configurations

Vendor	Product	Version range
Apple	Macos	≥ 14.0 and < 14.8.8
Apple	Macos	≥ 15.0 and < 15.7.8
Apple	Macos	≥ 26.0 and < 26.6

All CVSS metrics

CRITICAL 9.8 v3.1 · ADP Primary
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CRITICAL 9.8 v3.1 · NVD Secondary
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

References

Advisories

https://support.apple.com/en-us/128067 Release NotesVendor AdvisoryCVE record · apple · Updated 2026-07-27T20:13:47.889Z
NVD · CVE-2026-43750 · Updated 2026-10-24T13:10:00.147
https://support.apple.com/en-us/128071 Release NotesVendor AdvisoryCVE record · apple · Updated 2026-07-27T20:13:47.889Z
NVD · CVE-2026-43750 · Updated 2026-10-24T13:10:00.147
https://support.apple.com/en-us/128072 Release NotesVendor AdvisoryCVE record · apple · Updated 2026-07-27T20:13:47.889Z
NVD · CVE-2026-43750 · Updated 2026-10-24T13:10:00.147
https://euvd.enisa.europa.eu/vulnerability/EUVD-2026-49547 ADVISORYEUVD · EUVD-2026-49547

Sources: NVD · CVE.org · All sources and attribution · EPSS