Is CVE-2026-86950 being actively exploited?

Yes. CVE-2026-86950 is listed in the CISA Known Exploited Vulnerabilities (KEV) catalog, added on September 29, 2026.

What is the CVSS score for CVE-2026-86950?

CVE-2026-86950 has a CVSS 3.1 base score of 8.8 (HIGH).

CVE-2026-86950

HIGH · CVSS 8.8CISA KEV: actively exploitedEPSS 1.2%EU EUVD: exploited

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.

Key facts

CVSS score: 8.8 (v3.1)
Severity: HIGH
CVSS vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Weakness (CWE): CWE-787
EPSS score: 1.2% (69th percentile)
In CISA KEV: Yes, added September 29, 2026
In EU EUVD: Yes (EUVD-2026-88445)
Published: September 28, 2026
NVD last modified: October 1, 2026
Status: Analyzed

CISA Known Exploited Vulnerability

Apple Multiple Products Out-of-Bounds Write Vulnerability

Added to the KEV catalog on September 29, 2026; federal remediation due October 13, 2026.

EU Vulnerability Database (EUVD)

This vulnerability is also tracked by ENISA as EUVD-2026-88445 in the EU Vulnerability Database. ENISA flags it as known exploited. Last updated in EUVD on October 1, 2026.

View on the EU Vulnerability Database

Affected products

apple / ipados
apple / iphone os
apple / macos

Certified products that may be affected

33 FIPS 140 or Common Criteria certified products, from automated matching by sec-certs.org.

Apple macOS 26 Tahoe: FileVault - Apple Inc. - Common Criteria CCEVS-VR-VID-11696-2026 - active
Apple macOS 26 Tahoe - Apple Inc. - Common Criteria CCEVS-VR-VID-11695-2026 - active
Apple macOS 15 Sequoia - Apple Inc. - Common Criteria CCEVS-VR-VID-11648-2026 - active
Strong Customer Authentication for Apple Pay on MacBook Air 2024 with M3running macOS Sequoia 15.4 - Apple Inc. - Common Criteria 2025-11-INF-4674 - active
Apple macOS 14 Sonoma - Apple Inc. - Common Criteria CCEVS-VR-VID-11584-2025 - active

See all 33 in the Security Certifications Explorer.

References

http://seclists.org/fulldisclosure/2026/Sep/89(Mailing List, Third Party Advisory)
http://seclists.org/fulldisclosure/2026/Sep/90(Mailing List, Third Party Advisory)
http://seclists.org/fulldisclosure/2026/Sep/91(Mailing List, Third Party Advisory)
https://support.apple.com/en-us/149226(Release Notes, Vendor Advisory)
https://support.apple.com/en-us/149228(Release Notes, Vendor Advisory)
https://support.apple.com/en-us/149229(Release Notes, Vendor Advisory)
https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-86950(US Government Resource)

Last updated October 3, 2026 · Source: NVD, CISA KEV, FIRST.org EPSS

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