Exploited vulnerability · CISA KEV

Is CVE-2025-43529 exploited? Yes: in CISA KEV since 15 Dec 2025

Gociux · Apple Multiple Products · data: CISA KEV, CVE record, FIRST EPSS

Yes. CVE-2025-43529, Apple Multiple Products Use-After-Free WebKit Vulnerability, is being exploited in the wild. CISA added it to its Known Exploited Vulnerabilities catalog on 15 Dec 2025. It affects Apple Multiple Products. If you run it, CISA's required action is: Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.

exploitedYesCISA KEV · 15 Dec 2025

ransomwareNot knownno confirmed use

EPSStop 5%very likely to be exploited

severity8.8CVSS 3.1 · high

US federal due5 Jan 2026BOD 22-01 deadline

What it is

Apple iOS, iPadOS, macOS, and other Apple products contain a use-after-free vulnerability in WebKit. Processing maliciously crafted web content may lead to memory corruption. This vulnerability could impact HTML parsers that use WebKit, including but not limited to Apple Safari and non-Apple products which rely on WebKit for HTML processing.

Vendor	Apple (96 exploited CVEs in KEV)
Product	Multiple Products
Vulnerability	Apple Multiple Products Use-After-Free WebKit Vulnerability
Weakness	CWE-416
Published	17 Dec 2025
Added to KEV	15 Dec 2025
Reported by (CNA)	apple

What to do

Check whether you run it. Look for Multiple Products in your asset inventory, including appliances and cloud images. Stack check lists every exploited Apple CVE at once.
Apply the fix. Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.
If you can't patch today, take the affected service off the internet or restrict who can reach it, and check its logs for signs of compromise since 17 Dec 2025.
Get told next time. Email alerts when CISA adds a CVE for Apple.

Other exploited CVEs in Multiple Products

CVE-2024-27834: Apple Multiple Products Improper Authentication Vulnerability (4 Nov 2026)
CVE-2026-86950: Apple Multiple Products Out-of-Bounds Write Vulnerability (29 Sep 2026)
CVE-2025-43510: Apple Multiple Products Improper Locking Vulnerability (20 Mar 2026)
CVE-2025-43520: Apple Multiple Products Classic Buffer Overflow Vulnerability (20 Mar 2026)
CVE-2025-31277: Apple Multiple Products Buffer Overflow Vulnerability (20 Mar 2026)
CVE-2023-43000: Apple Multiple products Use-After-Free Vulnerability (5 Mar 2026)

References

Questions

Is CVE-2025-43529 being exploited?

Yes. CISA added CVE-2025-43529 to the Known Exploited Vulnerabilities catalog on 15 Dec 2025, which means there is reliable evidence of exploitation in the wild.

Is CVE-2025-43529 used in ransomware attacks?

CISA does not list known ransomware use for it. That can change, and exploitation alone is reason to fix it first.

How do I fix CVE-2025-43529?

Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable. Check Apple's advisory for the fixed versions, and if you can't patch quickly, restrict access to the affected Multiple Products and watch it for signs of compromise.

Sources: CISA KEV (exploitation, ransomware use, required action, due date), the CVE record (publication date, CVSS, CNA), NVD and FIRST EPSS (live score). More: all KEV additions in December 2025 · Apple scorecard · act-now radar.

Running Apple in a regulated environment?

We check exposure across your estate, patch or mitigate with your team, and set up detection for what attackers do after exploiting it.

Get in touch →