CVE-2025-43400

An out-of-bounds write issue was addressed with improved bounds checking. This issue is fixed in iOS 18.7.1 and iPadOS 18.7.1, iOS 26.0.1 and iPadOS 26.0.1, macOS Sequoia 15.7.1, macOS Sonoma 14.8.1, macOS Tahoe 26.0.1, tvOS 26.1, visionOS 26.0.1, watchOS 26.1. Processing a maliciously crafted font may lead to unexpected app termination or corrupt process memory.

Published: 2025-09-29 Last update: 2026-06-17 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2025-43400 is rated Moderate Risk (62.6/100): CVSS Medium severity, with high exploitation likelihood (EPSS 6.33%, 93th percentile). EPSS ranks this CVE among the most likely to be exploited in the near term. EPSS rose +6.16% over the last day, indicating growing attacker interest. High exploitation likelihood—assess exposure and prioritize remediation.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Exploit prediction scoring system (EPSS) score for CVE-2025-43400

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2026-06-15 0.17% 6.33% +6.16%
2 2026-04-25 0.06% 0.17% +0.11%
3 2026-03-09 — 0.06% —

Full EPSS history (10 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2025-43400

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
6.3 3.1 MEDIUM
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:L Click to expand
Attack vector (AV:N)
Could be attacked over the internet or any normal routed network—not just someone sitting at the machine.
Attack complexity (AC:L)
Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:N)
No account or special rights needed—anonymous or random user is enough.
User interaction (UI:R)
A real person has to do something—click, install, enable—otherwise it doesn’t land.
Scope (S:U)
Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:L)
Some sensitive info could get out, but not a total data dump.
Integrity (I:L)
Attackers could change some data, but it’s limited—not everything goes.
Availability (A:L)
Might cause slowdowns, glitches, or partial disruption—not a full brick.
 2.8 3.4 134c704f-9b21-4f2e-91b3-4a467353bcc0

Weakness enumeration for CVE-2025-43400

Affected software / configurations for CVE-2025-43400

Vendor Product Version Raw CPE
apple ipados < 18.7.1 cpe:2.3:o:apple:ipados:*:*:*:*:*:*:*:*
apple ipados 26.0 cpe:2.3:o:apple:ipados:26.0:*:*:*:*:*:*:*
apple iphone_os < 18.7.1 cpe:2.3:o:apple:iphone_os:*:*:*:*:*:*:*:*
apple iphone_os 26.0 cpe:2.3:o:apple:iphone_os:26.0:*:*:*:*:*:*:*
apple macos >= 14.0, < 14.8.1 cpe:2.3:o:apple:macos:*:*:*:*:*:*:*:*
apple macos >= 15.0, < 15.7.1 cpe:2.3:o:apple:macos:*:*:*:*:*:*:*:*
apple macos 26.0 cpe:2.3:o:apple:macos:26.0:*:*:*:*:*:*:*
apple visionos < 26.0.1 cpe:2.3:o:apple:visionos:*:*:*:*:*:*:*:*

References for CVE-2025-43400

cvelogic Threat Intelligence