🛡️ CVE-2026-64776 — macos

How this vulnerability can be exploited

This issue can be reached with local access to the system, attack complexity is low, an attacker needs no privileges on the target. A user must be tricked into taking some action. The scope is unchanged, so the impact stays within the vulnerable component. Rated impact: confidentiality high, integrity none, availability none.

CVSS metrics in full

The score comes from this vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N

• Attack vector: Local — a local account, shell or session on the host is needed.
• Attack complexity: Low — the attack works reliably, with no preparation.
• Privileges required: None — an unauthenticated stranger can try it.
• User interaction: Required — someone has to click, open or visit something.
• Scope: Unchanged — the damage stays inside the vulnerable component.
• Confidentiality impact: High — total loss, or loss the attacker controls.
• Integrity impact: None.
• Availability impact: None.

Weakness class

CVE-2026-64776 is classified as CWE-125: Out-of-bounds Read. The code reads past the limits of a buffer, exposing adjacent memory contents or crashing the process.

Affected software

CVE-2026-64776 is recorded against 1 package.

• macos (from 26.0 up to 26.6)

Timeline and source

Published on 27 July 2026 and last revised on 28 July 2026. No public exploit is currently recorded for this entry. Record sourced from NVD.

References

support.apple.com
support.apple.com
support.apple.com

Other advisories for this package

macos has other advisories on record. If you are patching this one, these are worth checking on the same host:

• CVE-2026-65400 (9.8 Critical, published 6 Aug 2026)
• CVE-2026-43810 (9.8 Critical, published 27 Jul 2026)
• CVE-2026-64719 (8.1 High, published 27 Jul 2026)
• CVE-2026-64764 (7.8 High, published 27 Jul 2026)
• CVE-2026-28900 (5.5 Medium, published 27 Jul 2026)
• CVE-2026-43681 (7.1 High, published 27 Jul 2026)
• CVE-2026-43728 (7.5 High, published 27 Jul 2026)
• CVE-2026-43767 (5.0 Medium, published 27 Jul 2026)

Same weakness in other software

These advisories are the same class of weakness (CWE-125: Out-of-bounds Read) in other software:

• CVE-2019-16249 (published 9 Jul 2026)
• CVE-2022-23560 (8.0 High, published 9 Jul 2026)
• CVE-2019-14492 (8.0 High, published 9 Jul 2026)
• CVE-2022-23594 (8.0 High, published 9 Jul 2026)
• CVE-2017-18009 (8.0 High, published 9 Jul 2026)
• CVE-2019-14491 (8.0 High, published 9 Jul 2026)
• CVE-2017-12599 (8.0 High, published 9 Jul 2026)
• CVE-2022-21728 (8.0 High, published 9 Jul 2026)

Details

Affected Packages

References