CVE-2026-20673Network attack vector

Remote content loading via unenforced preview preference

Published Feb 11, 2026 · Updated Feb 11, 2026

Logic error in Apple Mail on affected iOS, iPadOS, and macOS releases allows remote attackers to load remote content in message previews. Mail fails to enforce the disabled “Load remote content in messages” preference for every preview, causing some previews to fetch sender-controlled resources. Receiving a crafted message is the apparent gate; Apple has not disclosed the affected preview path or any consequence beyond the unwanted remote request.

CVSS severity5.3
Medium
EPSS probability0.32%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Logic error in Apple Mail on affected iOS, iPadOS, and macOS releases allows remote attackers to load remote content in message previews. Mail fails to enforce the disabled “Load remote content in messages” preference for every preview, causing some previews to fetch sender-controlled resources. Receiving a crafted message is the apparent gate; Apple has not disclosed the affected preview path or any consequence beyond the unwanted remote request.

The record

CVE
CVE-2026-20673
Published
Feb 11, 2026
Updated
Feb 11, 2026
Vendor
Apple
Product
iOS and iPadOS
Classifications
Unavailable
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

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Apple · iOS and iPadOSversion=unspecified <18.7
Apple · macOSversion=unspecified <14.8; version=unspecified <15.7; version=unspecified <26.3

Published CVSS scores

5.3NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
5.3CISA-ADPCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/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 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

No sourced classifications are available.

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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