Is CVE-2025-43343 being actively exploited?

CVE-2025-43343 is not currently listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.

What is the CVSS score for CVE-2025-43343?

CVE-2025-43343 has a CVSS 3.1 base score of 9.8 (CRITICAL).

CVE-2025-43343

CRITICAL · CVSS 9.8EPSS 0.8%EU EUVD

The issue was addressed with improved memory handling. This issue is fixed in Safari 26, iOS 26 and iPadOS 26, macOS Tahoe 26, tvOS 26, visionOS 26, watchOS 26. Processing maliciously crafted web content may lead to an unexpected process crash.

Key facts

CVSS score: 9.8 (v3.1)
Severity: CRITICAL
CVSS vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Weakness (CWE): CWE-119
EPSS score: 0.8% (55th percentile)
In CISA KEV: No
In EU EUVD: Yes (EUVD-2025-29294)
Published: September 15, 2025
NVD last modified: June 17, 2026
Status: Modified

EU Vulnerability Database (EUVD)

This vulnerability is also tracked by ENISA as EUVD-2025-29294 in the EU Vulnerability Database. Last updated in EUVD on April 2, 2026.

View on the EU Vulnerability Database

Affected products

apple / ipados
apple / iphone os
apple / macos
apple / safari
apple / tvos
apple / visionos
apple / watchos
webkitgtk / webkitgtk
wpewebkit / wpe webkit

Certified products that may be affected

36 FIPS 140 or Common Criteria certified products, from automated matching by sec-certs.org.

Apple macOS 15 Sequoia - Apple Inc. - Common Criteria CCEVS-VR-VID-11648-2026 - active
Strong Customer Authentication for Apple Pay on MacBook Air 2024 with M3running macOS Sequoia 15.4 - Apple Inc. - Common Criteria 2025-11-INF-4674 - active
Apple macOS 14 Sonoma - Apple Inc. - Common Criteria CCEVS-VR-VID-11584-2025 - active
Apple iOS 18: iPhone - Apple Inc. - Common Criteria CCEVS-VR-VID-11623-2025 - active
Apple iPadOS 18: iPad - Apple Inc. - Common Criteria CCEVS-VR-VID-11624-2025 - active

See all 36 in the Security Certifications Explorer.

References

http://seclists.org/fulldisclosure/2025/Sep/49(Mailing List, Third Party Advisory)
http://seclists.org/fulldisclosure/2025/Sep/53(Mailing List, Third Party Advisory)
http://seclists.org/fulldisclosure/2025/Sep/57(Mailing List, Third Party Advisory)
http://seclists.org/fulldisclosure/2025/Sep/59(Mailing List, Third Party Advisory)
http://www.openwall.com/lists/oss-security/2025/10/13/4(Mailing List, Third Party Advisory)
https://access.redhat.com/errata/RHSA-2025:19946
https://security-tracker.debian.org/tracker/CVE-2025-43343
https://support.apple.com/en-us/125108(Release Notes, Vendor Advisory)
https://support.apple.com/en-us/125110
https://support.apple.com/en-us/125113(Release Notes, Vendor Advisory)
https://support.apple.com/en-us/125114(Release Notes, Vendor Advisory)
https://support.apple.com/en-us/125115(Release Notes, Vendor Advisory)
https://support.apple.com/en-us/125116(Release Notes, Vendor Advisory)
https://ubuntu.com/security/CVE-2025-43343
https://webkitgtk.org/security/WSA-2025-0007.html

Last updated September 17, 2026 · Source: NVD, CISA KEV, FIRST.org EPSS

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