What is the CVSS score of CVE-2025-43510?

CVE-2025-43510 has a CVSS 3.1 base score of 7.8 (High). CVSS vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H. EPSS exploitation probability: 0.0%.

Is there a public PoC exploit available for CVE-2025-43510?

Yes, a public proof-of-concept exploit is available for CVE-2025-43510. Prioritise patching immediately. EPSS: 0.0%.

How to fix or mitigate CVE-2025-43510?

Within 24 hours: Identify all affected systems and apply vendor patches immediately. Monitor vendor channels for patch availability.

Watchos CVE-2025-43510

HIGH

Improper Locking (CWE-667)

2025-12-12 product-security@apple.com

Buffer Overflow Apple Ipados Iphone Os Tvos Visionos Watchos

7.8

CVSS 3.1 · NVD

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Vulnerability Assessment

Weakness	CWE CWE-667 OWASP Top 10:2025 A06:2021 - Vulnerable and Outdated Components ASVS 5.0 V15 - Secure Coding and Architecture Proper locking
Impact	Medium-high risk. Cross-process memory manipulation can bypass inter-process isolation, a fundamental security boundary. CISA KEV listing confirms active exploitation, likely as part of exploit chains targeting Apple devices.
Exploit ScenarioDerived	A malicious app exploits the lock state flaw to modify shared memory used by a privileged system process, injecting code or corrupting data structures to escalate privileges from app sandbox to kernel level.

Act Now Prioritize within 24-48h. Why: Active threat signals + CRITICAL/HIGH severity.

Exploited in the wild (CISA KEV) No patch listed yet 0.0% exploitation probability (EPSS)

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AnalysisAIv1 – Mar 19, 2026

Apple kernel lock state checking flaw allows a malicious application to cause unexpected changes in memory shared between processes, potentially enabling cross-process data manipulation on iOS, macOS, and other Apple platforms.

Earlier versions of this analysis (1)

v1 Mar 19, 2026 - 18:30 CVSS 7.8

A memory corruption vulnerability caused by improper lock state checking in the Apple kernel allows malicious applications to manipulate shared memory between processes, affecting all major Apple operating systems.

RemediationAI

Apply the latest Apple security updates across all devices. This vulnerability is typically chained with other exploits, so patching all concurrent Apple advisories is essential.

Affects your stack

Find out whether the stacks and servers you run are on an affected version.

Checking this CVE against your own stacks and servers is part of the Basic plan and up.

Technical ContextAI · show details

The CWE-667 improper locking flaw means the kernel fails to properly validate lock states when processes access shared memory regions. This race condition allows a malicious app to modify memory that other processes rely on for integrity.

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Exploit and PoC references, threat intelligence from 22 sources

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Severity by source

NVD PRIMARY 7.8 HIGH

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

Primary rating from NVD · only source for this CVE.

CVSS VectorNVD

Attack Vector

Local

Attack Complexity

Low

Privileges Required

None

User Interaction

Required

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High

Lifecycle Timeline

Added to CISA KEV

Apr 03, 2026 - 14:28 cisa

CISA KEV

PoC Detected

Apr 03, 2026 - 14:28 vuln.today

Public exploit code

CVE Published

Dec 12, 2025 - 21:15 nvd

HIGH 7.8

DescriptionNVD

A memory corruption issue was addressed with improved lock state checking. This issue is fixed in watchOS 26.1, iOS 18.7.2 and iPadOS 18.7.2, macOS Tahoe 26.1, visionOS 26.1, tvOS 26.1, macOS Sonoma 14.8.2, macOS Sequoia 15.7.2, iOS 26.1 and iPadOS 26.1. A malicious application may cause unexpected changes in memory shared between processes.

Executive ViewAI

Why It Matters

Organizations using A memory corruption face notable risk from CVE-2025-43510 rated CVSS 7.8. Exploitation could compromise the security of affected deployments. This vulnerability is actively exploited in the wild (KEV-listed) and requires immediate remediation. Immediate patching is required per CISA KEV mandate.

Business Impact: Severe

Compensating Controls

Apply vendor patch. If immediate patching is not feasible: (1) Implement network-level access controls to limit exposure; (2) Enable enhanced monitoring and alerting; (3) Apply principle of least privilege.

Threat Intelligence Overview

Threat Score

4.6/10

Composite threat intelligence

EPSS Score

0.0%

Top 96% exploitable

Exploit

POC

Public exploit code exists

Data Quality

5 sources

Confidence: Medium

NVD

CVE.org

CISA KEV

EPSS

VulDB

How this decision was reached

The engine reads each signal below and applies a fixed list of rules from top to bottom. The first rule that matches sets the recommended action – like a statement, every line is shown.

SignalValue

Severity HIGH

CISA KEV Yes

Public POC Yes

EPSS 0.0%

Patch available No

Active threat Yes

Deciding rule

Active threat signals + CRITICAL/HIGH severity

What every action level means

Emergency Immediate action required. Criteria: CRITICAL + in CISA KEV (actively exploited) without patch, OR CRITICAL + EPSS > 30% without patch, OR CRITICAL + active threat signals without patch.

Act Now Prioritize within 24-48h. Criteria: in KEV with patch available, OR CRITICAL + public POC, OR HIGH + EPSS > 10%, OR CRITICAL + active threat, OR any CRITICAL severity.

This Week Schedule remediation this week. Criteria: HIGH severity (CVSS 7.0-8.9). Patch within normal change window.

This Month Plan within 30 days. Criteria: MEDIUM severity (CVSS 4.0-6.9), lower exploitation probability. Include in regular patch cycle.

Monitor Track and reassess. Criteria: LOW severity (CVSS 0.1-3.9), minimal exploitation risk. No immediate action needed.

SSVC AssessmentENISA

SSVC Decision· derived

Out-of-Cycle

Exploitation· derived

Active

System Exposure· derived

Small

Automatable· derived

Human Impact

Very High

Priority Score

109

Low Medium High Critical

KEV: +50

EPSS: 0

CVSS: +39

PoC: +20

Weaponized: 0

Threat intel: 0

Gov advisory: 0

Attack Technique

Buffer Overflow HIGH

A buffer overflow occurs when a program writes more data to a memory buffer than it was allocated to hold, causing the excess data to spill into adjacent memory regions.