CVE-2026-20700Known exploitation

Arbitrary code execution via dyld memory corruption

Published Feb 11, 2026 · Updated Feb 11, 2026

Memory corruption in dyld in Apple operating systems before 26.3 allows local users with memory-write capability to execute arbitrary code. Dyld mishandles internal state during an operation Apple has not disclosed, corrupting memory after an attacker has already gained a write primitive. The flaw is a second-stage local code-execution primitive rather than initial access; reported exploitation targeted specific individuals on iOS before iOS 26.

CVSS severity7.8
High
EPSS probability1.34%
Next 30 days · Sep 16, 2026
Known exploitationReported
Based on sourced intelligence
Hinoki checkNot available
Coverage for this vulnerability

See if you're affected

Explore vulnerability checks for your environment with Hinoki.

Book a demo

Summary

What happened

Memory corruption in dyld in Apple operating systems before 26.3 allows local users with memory-write capability to execute arbitrary code. Dyld mishandles internal state during an operation Apple has not disclosed, corrupting memory after an attacker has already gained a write primitive. The flaw is a second-stage local code-execution primitive rather than initial access; reported exploitation targeted specific individuals on iOS before iOS 26.

The record

CVE
CVE-2026-20700
Published
Feb 11, 2026
Updated
Feb 11, 2026
Vendor
Apple
Product
iOS and iPadOS
Classifications
CWE-119, T1203
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Feb 11, 2026CVE publishedPublication date reported by the CVE source.
  2. Feb 11, 2026Record updatedLatest update available in the CVE record.
  3. Feb 12, 2026Exploitation reportedCISA Known Exploited Vulnerabilities catalog entry

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=unspecified <26.3

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

Apple · iOS and iPadOSversion=unspecified <26.3
Apple · visionOSversion=unspecified <26.3
Apple · tvOSversion=unspecified <26.3
Apple · macOSversion=unspecified <26.3
Apple · watchOSversion=unspecified <26.3

Published CVSS scores

7.8CISA-ADPCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesauthenticated
Known exploitationReported
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-119Improper Restriction of Operations within the Bounds of a Memory Buffer
T1203Exploitation for Client Execution

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Reported exploitation

Technologies

Your stack

See the directory against your own environment.

Your stack

Check the software in your environment

Book a demo to see how Hinoki identifies affected software and validates exploitability in your environment.

Book a demo