Threats / Apple / CVE-2025-43520
CVE-2025-43520
· EUVD no mirror located
· GCVE no mirror located
Verified 2026-06-22
Apple Multiple Products vulnerability
Apple's watchOS, iOS, iPadOS, macOS, visionOS, and tvOS contain a buffer overflow vulnerability allowing malicious applications to cause system termination or write kernel memory.
Verdict
Today item — known-exploited.
A locally-exploitable buffer overflow in multiple Apple platforms enables privilege escalation and kernel memory corruption. Active exploitation in the wild with low EPSS score suggests targeted rather than mass-scale attacks.
01
Is it exploitable?
— the evidence, ranked above the scoreReported exploitation
4 independent public reports of in-the-wild exploitation are cataloged.Distinct reporting sources (vendor, incident response, government); open them for the underlying claims.
Exploited in the wild
Listed in the CISA Known Exploited Vulnerabilities catalog (added 2026-03-20).
Probability (EPSS)
EPSS 0.00401 — modeled likelihood of exploitation activity.EPSS is a daily-changing model output — open the source for today's value.
Severity / affected
Affected: Apple, Multiple Products. Confirm exact fixed builds in the vendor advisory.
Weakness (CWE)
Mapped to CWE-120 Buffer Copy without Size Check — weakness family: Memory safety.CWE assignment from the public NVD record; the weakness class drives how the flaw is exploited.
02
Who’s exploiting it?
— attribution turns risk into urgencyAttribution not established
No confirmed (advisory-backed) threat-actor attribution is established for this record. Absence of a named actor is not absence of compromise — see Coverage & confidence.
03
Why it matters
— the attack path, told twice: adversary, then board1
Front door — unauthenticated access narrative 1
Attacker
I craft a malicious application that triggers a buffer overflow in a vulnerable Apple system component.
Business
User devices become unstable or crash unexpectedly, degrading platform reliability and user trust.
2
Keys to the kingdom — privilege/identity takeover narrative 2
Attacker
I exploit the overflow to write arbitrary data into kernel memory, bypassing security boundaries.
Business
Attackers gain kernel-level code execution, enabling complete device compromise and data exfiltration.
3
Lateral reach — past segmentation narrative 3
Attacker
I distribute the malicious app through legitimate channels or social engineering to reach target users.
Business
Apple's app review processes and user security are undermined, creating liability and reputational damage.
04
What to do
— defensible action- Remediate per the vendor advisory — confirm the fixed build for your version and verify exposure.1
Say it to the boardA vulnerability with this evidence profile is a defensible budget line, not a backlog ticket — fund the change against the proof above.
05