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Weekly Signal
Live intelligence Updated 21 Aug 2026 · 22:11 UTC

Apple · iOS, iPadOS, and macOS, Ipados, Iphone Os +1 more

CVE-2025-43300

Apple iOS, iPadOS, and macOS Out-of-Bounds Write Vulnerability

Recommended action

Validate affected assets and exposure now, then remediate on an accelerated schedule. Apple Security release notes 124925

View response plan
CVSS10.0
EPSS20.4%
KEVYes
ExploitationConfirmed exploitation
RemediationFixed release identified ↓

Assessment

Why it matters

CISA lists this vulnerability as known to be exploited; exploitation is confirmed; EPSS is 20.4%; technical severity is CVSS 10.0.

An out-of-bounds write issue was addressed with improved bounds checking. This issue is fixed in iOS 15.8.5 and iPadOS 15.8.5, iOS 16.7.12 and iPadOS 16.7.12, iOS 18.6.2 and iPadOS 18.6.2, iPadOS 17.7.10, macOS Sequoia 15.6.1, macOS Sonoma 14.7.8, macOS Ventura 13.7.8. Processing a malicious image file may result in memory corruption. Apple is aware of a report that this issue may have been exploited in an extremely sophisticated attack against specific targeted individuals.

Who should care

  • Teams operating iOS, iPadOS, and macOS, Ipados, Iphone Os +1 more
  • Vulnerability and exposure management teams
  • Security operations teams monitoring exploitation activity

Response plan

What I would do

  1. Confirm whether iOS, iPadOS, and macOS, Ipados, Iphone Os +1 more is present in the environment.
  2. Identify affected versions and establish whether vulnerable services are exposed or reachable.
  3. Apple Security release notes 124925
  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.

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Required Action

Technical details

CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H
CWE
CWE-787
Affected versions
Apple iOS, iPadOS, and macOS; Apple Ipados (End Excluding 15.8.5 | Start Including 16.0, End Excluding 16.7.12 | Start Including 17.0, End Excluding 17.7.10 | Start Including 18.0, End Excluding 18.6.2); Apple Iphone Os (End Excluding 15.8.5 | Start Including 16.0, End Excluding 16.7.12 | Start Including 17.0, End Excluding 18.6.2); Apple macOS (Start Including 13.0, End Excluding 13.7.8 | Start Including 14.0, End Excluding 14.7.8 | Start Including 15.0, End Excluding 15.6.1)
Fixed versions
Apple Ipados (Fixed from 15.8.5, 16.7.12, 17.7.10, 18.6.2); Apple Iphone Os (Fixed from 15.8.5, 16.7.12, 18.6.2); Apple macOS (Fixed from 13.7.8, 14.7.8, 15.6.1)
Published
20 August 2025
Attack vector
Network
Privileges required
None
User interaction
None

Signal timeline

  1. Added to CISA KEV
  2. Latest EPSS score: 20.4%
  3. Signal calculated at 74

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.