Background exploitation KEV catalog

CVE-2025-43520

Apple Multiple Products Classic Buffer Overflow Vulnerability

CheckOps priority index

3.4/10 Patch within 7 days

Severity5.5

Probability0.0

Exploitation2/5

Severity = CVSS. Probability = EPSS (FIRST). Exploitation = public signals: KEV, EUVD, ransomware, EPSS above 10 %, no account required.

EPSS · today 0.43% higher than 36.8% of CVEs

CVSS 3.1 5.5 AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:

Exploited for 228 days 20 Mar 2026

CISA due date 03 Apr 2026 for US federal agencies

Exploitation probability EPSS · FIRST

EPSS probability (%)Percentile among all CVEs

Exploitation signals 2 / 5

KEV catalog (CISA)20 Mar 2026
Exploited in EUVD (ENISA)20 Mar 2026
Used by ransomwareno
EPSS above 10 %0.43%
No account, over the networkno

What to do

Fix

Apply the vendor’s fix as soon as it is available.

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

Meanwhile

Take the service off the internet or restrict access to it, watch the logs and look for signs of compromise.

Manufacturers (CRA)

Exploited vulnerability in your product: early warning to ENISA within 24 h, then notification within 72 h (Article 14 of the Cyber Resilience Act). The CRA explained

Description ENISA EUVD

A memory corruption issue was addressed with improved memory handling. This issue is fixed in iOS 18.7.2 and iPadOS 18.7.2, iOS 26.1 and iPadOS 26.1, macOS Sequoia 15.7.2, macOS Sonoma 14.8.2, macOS Tahoe 26.1, tvOS 26.1, visionOS 26.1, watchOS 26.1. A malicious application may be able to cause unexpected system termination or write kernel memory.

Affected products

watchOSmacOSvisionOSiOS and iPadOStvOSMultiple Products

Affected versions

0 <26.1
0 <14.8.2
0 <15.7.2
0 <18.7.2

Weaknesses (CWE)

CWE-120

Open source packages OSV

Affected libraries according to OSV, with fixed versions.

Timeline

12 Dec 2025
Published
20 Mar 2026
Exploitation reported (ENISA)
20 Mar 2026
Added to the KEV catalog
03 Apr 2026
CISA remediation due date

References

Other exploited vulnerabilities from the same vendor

CVE-2026-86950Apple Multiple Products Out-of-Bounds Write Vulnerability
6.7 · Actively exploited
CVE-2026-65400Apple macOS Improper Authentication Vulnerability
5.8 · Actively exploited
CVE-2025-43510Apple Multiple Products Improper Locking Vulnerability
4.3 · Background exploitation
CVE-2025-31277Apple Multiple Products Buffer Overflow Vulnerability
5.4 · Background exploitation
CVE-2023-43000Apple Multiple products Use-After-Free Vulnerability
5.4 · Background exploitation
CVE-2023-41974Apple iOS and iPadOS Use-After-Free Vulnerability
4.4 · Background exploitation