Vulnerability · CVE-2026-20700
Apple Multiple Buffer Overflow Vulnerability
Published Feb 11, 2026 · catalog updated Jun 17, 2026 · Apple Multiple Products
Patch now
CVE-2026-20700 is in the CISA known-exploited catalog, due Mar 5, 2026. Confirm Apple Multiple Products against the vendor advisory and apply that fix. The CVSS score does not change the priority.
Gaps on this record
- No version range is stored. A customer cannot check an installed version against this record.
- Severity
- High7.8
- Known exploitation
- CISA KEV and VulnCheck KEV
- EPSS
- 1.39%
- Remediation
- Remediation guidance
- Affected products
- cpe apple/ipados · cpe apple/iphone os · cpe apple/macos · cpe apple/tvos · cpe apple/visionos · cpe apple/watchos
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.
Are you affected?
Enter the version you run. The result uses only the ranges stored on this record.
The check returns affected, not affected, or incomplete. It does not guess a version that is missing from the record.
- cpe apple/ipadosversion unspecified
- cpe apple/iphone osversion unspecified
- cpe apple/macosversion unspecified
- cpe apple/tvosversion unspecified
- cpe apple/visionosversion unspecified
- cpe apple/watchosversion unspecified
- vendor Apple Multiple Productsversion unspecified
How to fix CVE-2026-20700
Recommended remediation
Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable. CISA due date Mar 5, 2026.
Official advisories
What to do
Three questions, each answered from this record only. Confirm the vendor advisory before you patch.
Should you patch?
CVE-2026-20700 is in the CISA known-exploited catalog, due Mar 5, 2026. Confirm Apple Multiple Products against the vendor advisory and apply that fix. The CVSS score does not change the priority.
Which versions are affected?
Affected version ranges are not on this record. Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.
What should an analyst verify?
CWE-119: Buffer Overflow. EPSS 1.39%. The CISA KEV listing is the exploitation evidence. No Exploit-DB or Metasploit reference is linked. Use the source links for the original advisory.
Code
The project this record applies to. Exploit listings stay in References.
No public source repository is identified for this product.
Timeline
Detection, updates, and resolution for this record.
Feb 11, 2026 · Catalog
Detected
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
Feb 12, 2026 · CISA KEV
Known exploited
Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.
Mar 5, 2026 · CISA KEV
Remediation due
Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.
Jun 17, 2026 · Catalog
Updated
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
Sources
- CISA KEVConfirmed exploitationCVE-2026-20700
Apple iOS, macOS, tvOS, watchOS, and visionOS contain an improper restriction of operations within the bounds of a memory buffer vulnerability that could allow an attacker with memory write the capability to execute arbitrary code.
cisa.gov - CVE.orgVulnerability recordCVE-2026-20700
Official CVE identifier
cve.org - FIRST EPSSExploitation probabilityCVE-2026-20700
30-day exploitation probability 1.4%
first.org - NIST NVDVulnerability recordCVE-2026-20700
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 r
nvd.nist.gov - VulnCheck KEVConfirmed exploitationCVE-2026-20700
Apple iOS, macOS, tvOS, watchOS, and visionOS contain an improper restriction of operations within the bounds of a memory buffer vulnerability that could allow an attacker with memory write the capability to execute arbitrary code.
vulncheck.com
References
Freshness
Last verified in this catalog Oct 18, 2026. Significant claims (KEV, EPSS, CVSS, affected ranges) come from the source rows above — open the original publisher for the authoritative advisory.