Is CVE-2025-24201 (Apple Multiple Products WebKit Out-of-Bounds Write) being exploited in the wild?

Yes. CISA added CVE-2025-24201 to its Known Exploited Vulnerabilities catalogue on 13 March 2025, which it does only when there is reliable evidence of active exploitation. CISA has not linked it to known ransomware campaigns. Apple iOS, iPadOS, macOS, and other Apple products contain an out-of-bounds write vulnerability in WebKit that may allow maliciously crafted web content to break out of Web Content sandbox.

What “being exploited in the wild” means for this Apple WebKit CVE

For this question, the key point is that CISA’s KEV inclusion changes the meaning of the alert from theoretical to operational. It tells practitioners to treat the issue as an active exploitation case, not just a vendor-disclosed bug. For browser engine flaws like WebKit, exposure can exist wherever Apple devices process untrusted web content.

That matters because the initial compromise path is often simply normal browsing, embedded web views, or any application that renders web content. The direct answer already gives the vulnerability type and the impacted Apple product family, so the practical question is not whether exploitation is possible, but where untrusted content can reach your fleet.

How to confirm exposure and decide what to do first

Start with inventory, because the relevant surface is broader than a single browser installation. Confirm which iPhone, iPad, and Mac estates are in scope, then identify any managed apps, embedded browsers, or web content renderers that rely on WebKit. CISA’s Known Exploited Vulnerabilities Catalog is the authoritative signal that prioritization should be immediate.

When an issue is already in KEV, patch timing should be driven by exposure rather than by standard maintenance windows. If you have internet-facing Apple-managed endpoints, high-risk users, or devices that routinely open untrusted links and documents, treat them as first-wave remediation candidates. For version and fix details, send operators to the vendor advisory and the KEV record instead of trying to infer patch status from third-party summaries.

What to watch for if patching is delayed

If you cannot remediate immediately, reduce the amount of untrusted web content reaching the affected population. That includes tightening browser and mail workflows, limiting ad hoc link opening on high-value endpoints, and shortening the window in which vulnerable devices remain exposed. The practical objective is to shrink the chance that exploit content ever reaches the WebKit parser.

Because this is an out-of-bounds write, assume the flaw may support code execution or sandbox escape behavior rather than a harmless crash. That makes pre-patch containment more important than passive monitoring alone. If you have to defer remediation, document the exception explicitly, narrow the device set, and add compensating scrutiny to the users and systems most likely to encounter malicious content.

Risk and Threat Considerations

Active exploitation means attackers already have a reason to target the flaw, so exposure is not limited to devices that look obviously risky. A browser engine weakness can be abused through routine web traffic, which makes this class of issue attractive for opportunistic delivery and for targeted compromise against specific users or roles.

Failure mechanism: Maliciously crafted web content reaches WebKit, triggers the out-of-bounds write, and can lead to memory corruption, sandbox escape, or follow-on execution paths before defenders notice unusual behavior.

Impact: The likely consequence is device compromise, data exposure, session theft, or a foothold for broader intrusion on Apple endpoints that process hostile content.

Standards & Framework Alignment

This section maps relevant standards and security frameworks to the operational risks and controls described in this guidance.

CIS Controls v8, NIST SP 800-53 Rev 5, NIST CSF 2.0 and OWASP ASVS set the governance and control requirements practitioners need to meet.

Framework	Control / Reference	Relevance
CIS Controls v8	CIS-7 — Continuous Vulnerability Management	Active exploitation makes rapid identification and remediation of vulnerable Apple endpoints central.
Recommendation — Prioritise rapid remediation of KEV-listed systems and verify exposure continuously.
NIST SP 800-53 Rev 5	SI-2 — Flaw Remediation	A live WebKit exploit requires timely patching and exception control across affected Apple devices.
Recommendation — Track and remediate the vulnerable software promptly, and manage deferrals as formal exceptions.
NIST CSF 2.0	ID.RA-01 — Asset vulnerabilities are identified and documented	The answer depends on confirming which Apple assets are exposed to the exploited WebKit flaw.
	PR.PS-04 — Software is patched or replaced in a timely manner	KEV status makes timely remediation the primary control expectation for this exploited CVE.
Recommendation — Identify exposed Apple assets and document the vulnerable population before prioritising response. Patch or replace affected software quickly, using KEV status to drive urgency.
OWASP ASVS	V15 — Secure Coding and Architecture	The flaw is a memory-safety weakness in a widely used rendering engine, which maps to secure-by-design software concerns.
Recommendation — Treat memory-safety defects as architectural weaknesses that require secure coding and validation discipline.

Practitioner Guidance

What to verify: Verify which Apple devices are actually able to reach the vulnerable code path, not just which are formally owned by the business. Managed fleets, contractor devices, and shared executive devices often have different exposure than baseline inventory suggests.

Decision rule: If the device can open untrusted web content and is still on the vulnerable build, prioritise remediation before routine hardening tasks. If patching must wait, restrict exposure first, then monitor for signs of compromise or unusual browser and process behavior.

Practitioner takeaway: For a KEV-listed browser engine flaw, the question is no longer “is it real?” but “which endpoints are still reachable by exploit content, and how quickly can you remove that reach?”