CVE-2026-20660Network attack vector

Arbitrary file write via path mishandling

Published Feb 11, 2026 · Updated Feb 11, 2026

Path traversal in CFNetwork in Apple operating systems and Safari allows remote attackers to write arbitrary files via network input. CFNetwork mishandles attacker-controlled paths, but Apple has not disclosed the affected API, protocol, or exact path-normalization error. The write is limited to attacker-selected files; public records do not establish code execution, and CISA’s alternate assessment requires local access and user interaction.

CVSS severity7.5
High
EPSS probability0.79%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Path traversal in CFNetwork in Apple operating systems and Safari allows remote attackers to write arbitrary files via network input. CFNetwork mishandles attacker-controlled paths, but Apple has not disclosed the affected API, protocol, or exact path-normalization error. The write is limited to attacker-selected files; public records do not establish code execution, and CISA’s alternate assessment requires local access and user interaction.

The record

CVE
CVE-2026-20660
Published
Feb 11, 2026
Updated
Feb 11, 2026
Vendor
Apple
Product
iOS and iPadOS
Classifications
CWE-22
Attack vector
network
Privileges
unauthenticated

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.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

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

  1. Affected versionversion=unspecified <18.7
  2. Affected versionversion=unspecified <26.3

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Apple · iOS and iPadOSversion=unspecified <18.7; version=unspecified <26.3
Apple · visionOSversion=unspecified <26.3
Apple · Safariversion=unspecified <26.3
Apple · macOSversion=unspecified <14.8; version=unspecified <26.3

Published CVSS scores

5.5CISA-ADPCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N
7.5NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N

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)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-22Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')

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.

Technologies

Your stack

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Your stack

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