CVE-2026-86950 | defend.network

What is CVE-2026-86950?

An out-of-bounds write issue was addressed with improved bounds checking. This issue is fixed in iOS 26.7.1 and iPadOS 26.7.1, macOS Sequoia 15.8.1, macOS Tahoe 26.7.1. Processing a maliciously crafted file may lead to arbitrary code execution. Apple is aware of a report that this issue may have been exploited in an extremely sophisticated attack against specific targeted individuals on versions of iOS before iOS 27.

CVSS8.8 NVD 3.1

SeverityHIGH

ExploitationNo exploitation reported

Triage statusNo Known Exploit

ActionPatch this week

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

CWECWE-787

NVD published2026-09-28

NVD last modified2026-09-29

Timeline

2026-09-28Published to the U.S. National Vulnerability Database (NVD)
2026-09-29First covered in a defend.network daily briefing
2026-09-29NVD record last updated

Affected product

See advisory

Remediation Steps

Apply Apple security updates to affected iOS, iPadOS, and macOS devices
Prioritize devices in high-risk environments (government, finance)
Avoid opening untrusted files that could exploit the out-of-bounds write
Monitor for suspicious file processing or unexpected code execution

References

Referenced in our briefings & reports

Vulnerability Priority Report – Week 4 of September 2026 (September 28 – October 4)
Apple zero-day, Microsoft mega-patch (974 CVEs), ShinyHunters Oracle escalation (2026-09-29)

Browse all tracked CVEs in the defend.network CVE database →

🤖 This CVE page is generated by defend.network from NVD, CISA KEV, EPSS, and our verified daily briefings. Severity and exploitation data come from official sources; always verify remediation steps against the official vendor advisory before acting in production.