Is CVE-2026-20700 being actively exploited?

Yes. CVE-2026-20700 is listed in the CISA Known Exploited Vulnerabilities (KEV) catalog, added on February 12, 2026.

What is the CVSS score for CVE-2026-20700?

CVE-2026-20700 has a CVSS 3.1 base score of 7.8 (HIGH).

CVE-2026-20700

HIGH · CVSS 7.8CISA KEV: actively exploitedEPSS 1.4%EU EUVD: exploited

A memory corruption issue was addressed with improved state management. This issue is fixed in iOS 26.3 and iPadOS 26.3, macOS Tahoe 26.3, tvOS 26.3, visionOS 26.3, watchOS 26.3. An attacker with memory write capability may be able to execute arbitrary code. 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 26. CVE-2025-14174 and CVE-2025-43529 were also issued in response to this report.

Key facts

CVSS score: 7.8 (v3.1)
Severity: HIGH
CVSS vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Weakness (CWE): CWE-119
EPSS score: 1.4% (72th percentile)
In CISA KEV: Yes, added February 12, 2026
In EU EUVD: Yes (EUVD-2026-6189)
Published: February 11, 2026
NVD last modified: June 17, 2026
Status: Analyzed

CISA Known Exploited Vulnerability

Apple Multiple Buffer Overflow Vulnerability

Added to the KEV catalog on February 12, 2026; federal remediation due March 5, 2026.

EU Vulnerability Database (EUVD)

This vulnerability is also tracked by ENISA as EUVD-2026-6189 in the EU Vulnerability Database. ENISA flags it as known exploited. Last updated in EUVD on April 2, 2026.

View on the EU Vulnerability Database

Affected products

apple / ipados
apple / iphone os
apple / macos
apple / tvos
apple / visionos
apple / watchos

Certified products that may be affected

38 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 38 in the Security Certifications Explorer.

References

https://support.apple.com/en-us/126346(Release Notes, Vendor Advisory)
https://support.apple.com/en-us/126348(Release Notes, Vendor Advisory)
https://support.apple.com/en-us/126351(Release Notes, Vendor Advisory)
https://support.apple.com/en-us/126352(Release Notes, Vendor Advisory)
https://support.apple.com/en-us/126353(Release Notes, Vendor Advisory)
https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-20700(US Government Resource)

Last updated September 17, 2026 · Source: NVD, CISA KEV, FIRST.org EPSS

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