What is CVE-2026-20700?

CVE-2026-20700 is a high-severity vulnerability in Apple Ios And Ipados, classified under Improper Restriction of Operations within the Bounds of a Memory Buffer. CVSS score: 7.8/10. Published 2026-02-11.

How severe is CVE-2026-20700?

High severity. CVSS v3 base score is 7.8 out of 10.

Is CVE-2026-20700 known to be exploited?

Yes. CVE-2026-20700 is listed in the CISA Known Exploited Vulnerabilities catalog (added 2026-02-12), indicating it is being actively exploited. 2 public proof-of-concept repositories are indexed.

Buffer overflow in Apple Ios And Ipados

CVE-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 exec…

Vulnerability class: Buffer Overflow

EPSS: 0.013 (67.6th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 7.8 (High). Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.

Affected products

Apple Ios And Ipados — versions 0
Apple Ipados
Apple Iphone_os
Apple Macos — versions 0
Apple Tvos — versions 0
Apple Visionos — versions 0
Apple Watchos — versions 0

Weakness classification (CWE)

CWE-119 — Improper Restriction of Operations within the Bounds of a Memory Buffer

CISA KEV (Known Exploited Vulnerabilities)

This CVE is on the CISA KEV catalog, added on 2026-02-12. CISA KEV inclusion means CISA has confirmed in-the-wild exploitation; US federal agencies are required to remediate within a published due date.

BOD 22-01 due date: 2026-03-05.

Required action: Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.

Public proof-of-concept exploits

References

product-security@apple.com (Release Notes, Vendor Advisory)
product-security@apple.com (Release Notes, Vendor Advisory)
product-security@apple.com (Release Notes, Vendor Advisory)
product-security@apple.com (Release Notes, Vendor Advisory)
product-security@apple.com (Release Notes, Vendor Advisory)
134c704f-9b21-4f2e-91b3-4a467353bcc0 (US Government Resource)

Frequently asked questions

What is CVE-2026-20700?: CVE-2026-20700 is a high-severity vulnerability in Apple Ios And Ipados, classified under Improper Restriction of Operations within the Bounds of a Memory Buffer. CVSS score: 7.8/10. Published 2026-02-11.
How severe is CVE-2026-20700?: High severity. CVSS v3 base score is 7.8 out of 10.
Is CVE-2026-20700 known to be exploited?: Yes. CVE-2026-20700 is listed in the CISA Known Exploited Vulnerabilities catalog (added 2026-02-12), indicating it is being actively exploited. 2 public proof-of-concept repositories are indexed.