How severe is CVE-2026-20700?

CVE-2026-20700 has a CVSS score of 7.8/10, rated HIGH. Immediate patching is strongly recommended.

Which packages are affected by CVE-2026-20700?

Affected package information for CVE-2026-20700 is not yet fully mapped. Check the official advisory links for details.

How do I fix CVE-2026-20700?

No fixed version has been published for CVE-2026-20700 yet. Monitor the advisory for updates, apply mitigations recommended by the vendor, and use O3 Security to track when a fix becomes available in your stack.

Is CVE-2026-20700 actively exploited in the wild?

Yes. There are 1 known exploit references for CVE-2026-20700, including . All exploit code should only be run in an isolated sandbox environment for research or authorized testing — never against production systems without explicit written authorization.

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

CVE-2026-20700 has an EPSS (Exploit Prediction Scoring System) score of 0.5%, placing it in the 64th percentile of all CVEs. EPSS is maintained by FIRST.org and estimates the probability that a vulnerability will be exploited in the wild within the next 30 days. This score indicates relatively lower exploitation probability, though the CVSS severity should still guide your patching priority.

Is CVE-2026-20700 in the CISA Known Exploited Vulnerabilities catalog?

Yes. CVE-2026-20700 (Apple Multiple Buffer Overflow Vulnerability) was added to CISA's Known Exploited Vulnerabilities (KEV) catalog on 2026-02-12. CISA required all US federal civilian agencies to remediate this vulnerability by 2026-03-05. The required action was: Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable. Being listed in the KEV catalog is the strongest possible confirmation of active exploitation — treat this as a critical priority.

What type of vulnerability is CVE-2026-20700?

CVE-2026-20700 is classified as Buffer Overflow (CWE-119). This weakness type describe the underlying flaw category, which helps determine the potential impact and the right class of mitigation. This is a high-impact weakness class that often enables remote code execution or data exposure.

Which products and versions are affected by CVE-2026-20700?

CVE-2026-20700 affects apple ipados; apple iphone os; apple macos; apple tvos, and 2 more product(s). Check the affected-products list on this page against your deployed version to confirm exposure.

When was CVE-2026-20700 published, and has it been updated?

CVE-2026-20700 was published on February 11, 2026 and was last updated on March 25, 2026. Advisory data evolves as severity scores, affected ranges, and exploit intelligence are revised — always check the latest version of the advisory before acting.

CVE-2026-20700: IPADOS Buffer Overflow (High 7.8)

EPSS Exploitation Probability

via FIRST.org ↗

0.5%probability of exploitation in next 30 days

Lower Risk64th percentile+0.02%

EPSS (Exploit Prediction Scoring System) is a daily probability model maintained by FIRST.org. It estimates the likelihood a CVE will be exploited in production environments within the next 30 days, derived from real-world threat intelligence signals.

Description

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.

Affected Products

6 products · 6 configurations

OS

ipadosapple

< 26.3

range

OS

iphone osapple

< 26.3

range

OS

macosapple

< 26.3

range

OS

tvosapple

< 26.3

range

OS

visionosapple

< 26.3

range

OS

watchosapple

< 26.3

range

Frequently Asked Questions

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.

O3 Security · Impact-Aware SCA

Is CVE-2026-20700 in your stack?

O3 detects CVE-2026-20700 across dependencies and uses function-level reachability to confirm whether the vulnerable code path is actually reachable — not just present. No false positives.

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