Secuno
ENNL
Book demo

CVE-2026-20700

Apple Multiple Buffer Overflow

7.8 HIGHActively exploited (CISA KEV)EPSS 1.37%
  1. Published11 Feb 2026
  2. Added to CISA KEV12 Feb 2026
  3. Remediation due5 Mar 2026
Actively exploited (CISA KEV)

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.

Added to KEV: 12 Feb 2026Federal remediation due: 5 Mar 2026

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.

CVSS 3.1 breakdown

Attack vectorLocal
Attack complexityLow
Privileges requiredLow
User interactionNone
ScopeUnchanged
ConfidentialityHigh
IntegrityHigh
AvailabilityHigh
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Affected products

Apple iPadOS< 26.3
Apple iPhone OS< 26.3
Apple macOS< 26.3
Apple Tvos< 26.3
Apple Visionos< 26.3
Apple Watchos< 26.3

Remediation

Fixed in
Apple iPadOS≥ 26.3
Apple iPhone OS≥ 26.3
Apple macOS≥ 26.3
Apple Tvos≥ 26.3
Apple Visionos≥ 26.3
Apple Watchos≥ 26.3

References

Related CVEs

Recent high-severity vulnerabilities sharing a weakness type.

CVE-2026-10910910.0
A vulnerability was detected in Wavlink WL-WN530BE1-A 251117. This vulnerability…
CVE-2026-962658.2
IBM Power Systems Firmware FW1060.00 through FW1060.81 is affected by a vulnerability…
CVE-2026-1089159.9
A vulnerability has been found in Edimax BR-6208AC 1.32. This affects an unknown part…
CVE-2026-1089149.9
A flaw has been found in Edimax BR-6208AC 1.32. Affected by this issue is some unknown…
CVE-2026-1088939.9
A vulnerability was identified in Linksys E1700 up to 1.0.0.4.003. This issue affects…
CVE-2026-10889210.0
A vulnerability was determined in Linksys E1700 1.0.0.4.003. This vulnerability affects…

Frequently asked

Is CVE-2026-20700 being actively exploited?

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

How severe is CVE-2026-20700?

CVE-2026-20700 has a CVSS 3.1 base score of 7.8, rated high. EPSS estimates a 1.37% probability of exploitation.

Which products are affected by CVE-2026-20700?

Affected products include Apple iPadOS, Apple iPhone OS, Apple macOS, Apple Tvos, Apple Visionos, and 1 more.

How do I fix CVE-2026-20700?

Upgrade affected software to a fixed version, for example Apple iPadOS 26.3, Apple iPhone OS 26.3, Apple macOS 26.3 or later, then confirm no affected versions remain in your inventory.

How Secuno handles this

Secuno correlates vulnerabilities like CVE-2026-20700 against the real software inventory on every managed device, every day. Rather than a static severity, each match is scored in context: exploit availability, EPSS, the asset's exposure, and business criticality decide where it lands in the queue. Because it is on the CISA KEV list, Secuno flags any affected asset as top-priority automatically. If an affected version is present anywhere across your portfolio, it surfaces automatically with a prioritised remediation path.

See how prioritisation worksBook a demo

Get Patch this first every Monday

Five vulnerabilities that matter this week, ranked on real exploitation. Plain language, one email, no spam.

You can unsubscribe with one click from every issue. We handle your details as described in our privacy policy.

Data from the NVD, CISA KEV catalog and FIRST EPSS. CVSS 3.1 base score shown where available.