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Weekly Signal
Live intelligence Updated 20 Aug 2026 · 23:28 UTC

Apple, Debian, Fedoraproject +3 more · Ipados, Iphone Os, macOS +12 more

CVE-2023-41993

Apple Multiple Products WebKit Code Execution Vulnerability

Recommended action

Validate affected assets and exposure now, then remediate on an accelerated schedule. Apple Security patch HT213926

View response plan
CVSS8.8
EPSS29.2%
KEVYes
ExploitationConfirmed exploitation
RemediationExplicit patch identified ↓

Assessment

Why it matters

CISA lists this vulnerability as known to be exploited; exploitation is confirmed; EPSS is 29.2%; technical severity is CVSS 8.8.

The issue was addressed with improved checks. This issue is fixed in macOS Sonoma 14. Processing web content may lead to arbitrary code execution. Apple is aware of a report that this issue may have been actively exploited against versions of iOS before iOS 16.7.

Who should care

  • Teams operating Ipados, Iphone Os, macOS +12 more
  • Vulnerability and exposure management teams
  • Security operations teams monitoring exploitation activity

Response plan

What I would do

  1. Confirm whether Ipados, Iphone Os, macOS +12 more is present in the environment.
  2. Identify affected versions and establish whether vulnerable services are exposed or reachable.
  3. Apple Security patch HT213926
  4. Review relevant security telemetry for evidence of attempted or successful exploitation.
  5. Document the remediation decision and track it to verified completion.

Treatment intelligence

Remediation intelligence

Not yet verified

Vendor sources are listed before government and third-party guidance. Confirm product applicability and change prerequisites before deployment.

Verification noteAutomated link verification has not completed for this guidance yet.

Patch

Advisory

Required Action

Technical details

CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
CWE
CWE-754
Affected versions
Apple Ipados (End Excluding 17.0.1); Apple Iphone Os (End Excluding 17.0.1); Apple macOS (End Excluding 14.0); Apple Multiple Products; Debian Debian Linux (Version 11.0 | Version 12.0); Fedoraproject Fedora (Version 37 | Version 38 | Version 39); Netapp Active Iq Unified Manager (Version - | Version -); Netapp Cloud Insights Acquisition Unit (Version -)
Fixed versions
Apple Ipados (Fixed from 17.0.1); Apple Iphone Os (Fixed from 17.0.1); Apple macOS (Fixed from 14.0); WebKitGTK WebKitGTK (Fixed from 2.42.2)
Published
21 September 2023
Attack vector
Network
Privileges required
None
User interaction
Required

Signal timeline

  1. CVE published
  2. Added to CISA KEV
  3. Latest EPSS score: 29.2%
  4. Signal calculated at 75

External references

Live public intelligence This assessment combines public-source evidence. Validate the affected product, version and exposure against your own environment before making a risk decision.