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NVD / CVE Program· CNA apple

CVE-2025-43400: An out-of-bounds write issue was addressed with improved bounds checking.

MediumCVSS 6.3 · v3.1—Proof of concept No fix recorded

Noroxi assessment

Priority: Monitor (action score 27/100)

  • Public proof-of-concept code exists (GitHub); there is no record of exploitation in the wild.
  • Probability of exploitation in the next 30 days: 7.2% (FIRST EPSS); higher than 94.4% of all records.
  • Anyone who can reach it over the internet can trigger it. No account or password is required. A user must open a link or visit a page. No special conditions are required; it is repeatable.
  • According to the record, no fixed version is available yet.

Low priority for now. Update when a fix is released; follow the vendor's advisory.

Generated automatically from the record's data: CVSS (NVD and CNA), CISA KEV and SSVC, FIRST EPSS, exploit sources, fixed versions. How we calculate it

Primary sources: NVD · CVE.org · FIRST EPSS

An out-of-bounds write issue was addressed with improved bounds checking. This issue is fixed in iOS 18.7.1 and iPadOS 18.7.1, iOS 26.0.1 and iPadOS 26.0.1, macOS Sequoia 15.7.1, macOS Sonoma 14.8.1, macOS Tahoe 26.0.1, tvOS 26.1, visionOS 26.0.1, watchOS 26.1. Processing a maliciously crafted font may lead to unexpected app termination or corrupt process memory.

Published
Sep 29, 2025
Updated
Oct 18, 2026
EPSS
7.2% · 94th percentile

Report tools

JSON

Action score

27

Monitor

Low priority for now.

CVSS
25 / 40 · 6.3 / 10
CISA KEV
0 / 30 · Not listed
EPSS
2 / 30 · 7.2%

CISA SSVC decision

Exploitation
none
Automatable
no
Technical impact
partial

Vulnrichment: CISA's decision-tree inputs.

Get told when this record changes

  • Not in KEV: no record of exploitation in the wild
  • Proof of concept exists, no weaponized module
  • No fixed version yet

If any of these changes, we'll tell you in the daily email digest.

Follow CVE-2025-43400

When you'll hear from us

  • when it enters CISA KEV
  • when exploit code appears or is weaponized
  • when the record is updated (including a fixed version)
  • when EPSS rises 20 points in a week

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Noroxi analysis

What does it mean in your environment?

The assessment above is generated automatically from the record's data; it doesn't know your environment. Our team verifies on your systems whether this vulnerability is actually exploitable and which mitigation is enough.

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Affected systems

Is your version affected?

Pick the product and type the version you run. It's compared with this record's version ranges in your browser; the version isn't sent anywhere.

VendorProduct
appleipados
appleiphone os
applemacos
applevisionos

Versions reported by the vendor

Affected version ranges reported by the assigning authority (apple). Independent of NVD's CPE analysis and usually ahead of it.

  • Apple iOS and iPadOS

    • before 18.7.1affected
    • before 26.0.1affected

  • Apple macOS

    • before 14.8.1affected
    • before 15.7.1affected
    • before 26.0.1affected

  • Apple tvOS

    • before 26.1affected

  • Apple visionOS

    • before 26.0.1affected

  • Apple watchOS

    • before 26.1affected
Affected versions · NVD (8)

NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.

  • apple ipadosbefore 18.7.1
  • apple ipados26.0
  • apple iphone osbefore 18.7.1
  • apple iphone os26.0
  • apple macos14.0 and later · before 14.8.1
  • apple macos15.0 and later · before 15.7.1
  • apple macos26.0
  • apple visionosbefore 26.0.1

Same product

apple: all records

Other highest-scoring records for the same primary product.

  • CVE-2025-43300An out-of-bounds write issue was addressed with improved bounds checking.KEV
    89Now
  • CVE-2021-30860An integer overflow was addressed with improved input validation.KEV
    84Now
  • CVE-2023-32434An integer overflow was addressed with improved input validation.KEV
    78This week

Published before and after this one in the same product

  • ← EarlierCVE-2025-43359Sep 15, 2025 · A logic issue was addressed with improved state management.
    39Monitor
  • ← EarlierCVE-2025-43372Sep 15, 2025 · The issue was addressed with improved input validation.
    31Monitor
  • Later →CVE-2025-43280Oct 15, 2025 · The issue was resolved by not loading remote images.
    18Monitor

Remediation

Which version to upgrade to

Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.

No fix version is recorded for this entry. Check the references for vendor advisories.

Exploit status

Proof of concept available

A public proof of concept or detection signature exists. Exploit knowledge is out there; don't delay patching.

Evidence

  • Proof-of-concept repository on GitHub ×1

Noroxi does not host or link to exploit code. Metasploit module names and Nuclei template ids are shown (names, not code); Exploit-DB entries and PoC repositories are given as counts only.

Public exploit evidence
SourceKindDate
Proof-of-concept repository on GitHubstars:52025-12-12

Research context

For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.

Timeline

From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.

  1. Published
  2. First PoC+73 d
  3. TodayNov 12, 2026+409 d

Variant candidates

Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.

  • CVE-2025-4330040 days apartAn out-of-bounds write issue was addressed with improved bounds checking.KEV
    89Now
  • CVE-2026-86950364 days apartAn out-of-bounds write issue was addressed with improved bounds checking.KEV
    73This week
  • CVE-2025-4320962 days apartAn out-of-bounds access issue was addressed with improved bounds checking.
    39Monitor
  • CVE-2024-44242292 days apartThe issue was addressed with improved bounds checks.
    39Monitor
  • CVE-2026-64770301 days apartAn out-of-bounds write issue was addressed with improved bounds checking.
    39Monitor
  • CVE-2026-64772301 days apartAn out-of-bounds write issue was addressed with improved input validation.
    39Monitor

Not on record for this CVE: EPSS history · patch commit or PR link · researcher credit · public bounty program.

Technical details

Attack conditions

  • Anyone who can reach it over the internet can trigger it.
  • No account or password is required.
  • A user must open a link or visit a page.
  • No special conditions are required; it is repeatable.

If successful

Confidentiality
low · data can be read
Integrity
low · data or configuration can be modified
Availability
low · the service can be disrupted
Attack vector
Network
Attack complexity
Low
Privileges required
None
User interaction
Required
Scope
Unchanged
Confidentiality impact
Low
Integrity impact
Low
Availability impact
Low

Weakness class (CWE)

CWE-787 · Out-of-bounds Write

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:L

nvd-secondary

Attack context

MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.

MITRE has no CAPEC/ATT&CK mapping for this CWE.

References

Show all references (10 more)

Vendor advisories and official records. Exploit/PoC links are deliberately left out.

All records