What is CVE-2022-26756?

CVE-2022-26756 is a high-severity vulnerability in Apple macOS, classified under Out-of-bounds Write. CVSS score: 7.8/10. Published 2022-05-26.

How severe is CVE-2022-26756?

High severity. CVSS v3 base score is 7.8 out of 10.

Buffer overflow in Apple macOS

CVE-2022-26756

An out-of-bounds write issue was addressed with improved input validation. This issue is fixed in Security Update 2022-004 Catalina, macOS Monterey 12.4, macOS Big Sur 11.6.6. An application may be able to execute arbitrary code with kernel privileges.

Vulnerability class: Buffer Overflow

Published 2022-05-26 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 7.8 (High). Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.010 (62.1th percentile), scored 2026-10-03.

Low probability of exploitation in the next 30 days, but still tracked. 62nd percentile — 62.1% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.010 · newest: 0.010 · change: +0.000

Affected products

Apple macOS — versions unspecified
Apple Mac OS X — versions 10.15.7
Apple Security Update - Catalina — versions unspecified

Weakness classification (CWE)

CWE-787 — Out-of-bounds Write

References

support.apple.com/en-us/HT213255 (Vendor Advisory)
support.apple.com/en-us/HT213256 (Vendor Advisory)
support.apple.com/en-us/HT213257 (Vendor Advisory)

Frequently asked questions

What is CVE-2022-26756?: CVE-2022-26756 is a high-severity vulnerability in Apple macOS, classified under Out-of-bounds Write. CVSS score: 7.8/10. Published 2022-05-26.
How severe is CVE-2022-26756?: High severity. CVSS v3 base score is 7.8 out of 10.