Is CVE-2025-43300 being actively exploited?

Yes. CVE-2025-43300 is listed in the CISA Known Exploited Vulnerabilities (KEV) catalog, added on August 21, 2025.

What is the CVSS score for CVE-2025-43300?

CVE-2025-43300 has a CVSS 3.1 base score of 10.0 (CRITICAL).

CVE-2025-43300

CRITICAL · CVSS 10.0CISA KEV: actively exploitedEPSS 32.5%EU EUVD: exploited

An out-of-bounds write issue was addressed with improved bounds checking. This issue is fixed in iOS 15.8.5 and iPadOS 15.8.5, iOS 16.7.12 and iPadOS 16.7.12, iOS 18.6.2 and iPadOS 18.6.2, iPadOS 17.7.10, macOS Sequoia 15.6.1, macOS Sonoma 14.7.8, macOS Ventura 13.7.8. Processing a malicious image file may result in memory corruption. Apple is aware of a report that this issue may have been exploited in an extremely sophisticated attack against specific targeted individuals.

Key facts

CVSS score: 10.0 (v3.1)
Severity: CRITICAL
CVSS vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H
Weakness (CWE): CWE-787
EPSS score: 32.5% (98th percentile)
In CISA KEV: Yes, added August 21, 2025
In EU EUVD: Yes (EUVD-2025-25409)
Published: August 21, 2025
NVD last modified: June 17, 2026
Status: Analyzed

CISA Known Exploited Vulnerability

Apple iOS, iPadOS, and macOS Out-of-Bounds Write Vulnerability

Added to the KEV catalog on August 21, 2025; federal remediation due September 11, 2025.

EU Vulnerability Database (EUVD)

This vulnerability is also tracked by ENISA as EUVD-2025-25409 in the EU Vulnerability Database. ENISA flags it as known exploited. Last updated in EUVD on April 2, 2026.

View on the EU Vulnerability Database

Affected products

apple / ipados
apple / iphone os
apple / macos

Certified products that may be affected

25 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 25 in the Security Certifications Explorer.

References

http://seclists.org/fulldisclosure/2025/Sep/10(Mailing List, Third Party Advisory)
http://seclists.org/fulldisclosure/2025/Sep/14(Mailing List, Third Party Advisory)
http://seclists.org/fulldisclosure/2025/Sep/52(Mailing List, Third Party Advisory)
https://github.com/b1n4r1b01/n-days/blob/main/CVE-2025-43300.md(Exploit, Third Party Advisory)
https://github.com/cisagov/vulnrichment/issues/201(Issue Tracking)
https://support.apple.com/en-us/124925(Release Notes, Vendor Advisory)
https://support.apple.com/en-us/124926(Release Notes, Vendor Advisory)
https://support.apple.com/en-us/124927(Release Notes, Vendor Advisory)
https://support.apple.com/en-us/124928(Release Notes, Vendor Advisory)
https://support.apple.com/en-us/124929(Release Notes, Vendor Advisory)
https://support.apple.com/en-us/125141(Release Notes, Vendor Advisory)
https://support.apple.com/en-us/125142(Release Notes, Vendor Advisory)
https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2025-43300(US Government Resource)

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

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