CVE-2025-43209: apple ios and ipados Out-of-bounds Write
Vulnerability summary
CVE-2025-43209 is a critical (CVSS 9.8) Out-of-bounds Write vulnerability in apple ios and ipados. EPSS estimates a 0.96% chance of exploitation in the next 30 days, higher than 60.9% of scored vulnerabilities.
Timeline
- 29-07-2025PublishedVulnerability first disclosed.
- 02-04-2026Last modifiedVulnerability information updated.
Description
An out-of-bounds access issue was addressed with improved bounds checking. This issue is fixed in iOS 18.6 and iPadOS 18.6, iPadOS 17.7.9, macOS Sequoia 15.6, macOS Sonoma 14.7.7, macOS Ventura 13.7.7, tvOS 18.6, visionOS 2.6, watchOS 11.6. Processing maliciously crafted web content may lead to an unexpected Safari crash.
CVSS metrics
2 scores · 2 sources · 1 version- NVDNIST9.8CriticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
EPSS trend
Probability
0.96%
Chance of exploitation in the next 30 days
Percentile
61%
Versus all other CVEs
30-day change
+0.05 pp
From 0.91% on 19-09-2026
Known exploited
Compare KEV catalogsNot in any of the 3 tracked catalogs.
Public exploits
0 foundNo public exploits indexed.
Weaknesses
CWE · root causeAffected systems
Apple7 products
- ios and ipados< 18.6
- ipados< 17.7.9 | ≥ 18.0, < 18.6
- iphone_os< 18.6
- macos< 14.7.7 | < 15.6 | < 13.7.7 | ≥ 14.0, < 14.7.7 | ≥ 15.0, < 15.6
- tvos< 18.6
1 vendor · 7 products