CVE-2026-20700
Apple Multiple Buffer Overflow Vulnerability
- Published
- Feb 11, 2026
- Updated
- Apr 2, 2026
- Assigning CNA
- apple
- Evidence observed
- Feb 12, 2026
Primary CVSS
nvd · CVSS 3.1
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:HLow · next 30 days
- Percentile
- 69.7%
- Model date
- Sep 21, 2026
EPSS is a statistical estimate, not a certainty or a measure of impact. Combine it with CVSS, KEV status, exposure and your environment.
CISA Known Exploited
This CVE appears in the CISA Known Exploited Vulnerabilities catalog.
Summary
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.
Sources
2Proof-of-concept exploit for CVE-2026-20700, demonstrating a specific vulnerability with a binary exploitation payload for security testing and validation.
PoC demonstrating dyld as a PAC signing oracle via hand-crafted Mach-O chained fixups on arm64e, achieving controlled PAC-valid pointer writes and dispatch callback execution on iOS.
Responsible use
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