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Fencer Vulns
critical 10.0

CVE-2025-43300 kev in the critical feed json

An out-of-bounds write issue was addressed with improved bounds checking.

published 2025-08-21 14 mo ago modified 2026-06-17 4 mo ago also EUVD-2025-25409

cvss
10.0
version 3.1, CNA
cisa kev
Exploited
added 2025-08-21
epss
65.2%
EPSS 65.2% chance of exploitation in 30 days, percentile 99.2%
public exploits
0
none known

Summary

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.

Patch / fix

cisa required action Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.

  • Apple iOS and iPadOS 15.8.5, 16.7.12, 18.6.2
  • Apple iPadOS 17.7.10
  • Apple macOS 13.7.8, 14.7.8, 15.6.1

Timeline

  1. 0-day patched (Project Zero)
  2. Added to CISA KEV
  3. Published
  4. CISA patch deadline
  5. CISA SSVC: exploitation active

Known exploited

Added
14 mo ago
Patch by
2025-09-11 (13 mo ago)
Ransomware
Not known
Required action
Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.
Vendor, product
Apple, iOS, iPadOS, and macOS
CISA name
Apple iOS, iPadOS, and macOS Out-of-Bounds Write Vulnerability

Zero-day

Detected in real attacks while still unknown to the vendor and the public, per Google Project Zero's 0day In-the-Wild tracker.

Patched
2025-08-20
Details
project zero tracker

CISA SSVC

Exploitation
Active, exploited in the wild
Automatable
yes
Technical impact
total
Assessed
11 mo ago

Exploit prediction

65.16% chance of exploitation in the next 30 days, higher than 99.2% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

  • github.com https://github.com/b1n4r1b01/n-days/blob/main/CVE-2025-43300.md referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by version score vector
CISA ADP 3.1 10.0 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H
CNA 3.1 10.0 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H

Affected products

  • Apple iOS and iPadOS
  • Apple iPadOS
  • Apple macOS

Classification

Weakness

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.