CVE-2025-43494

A mail header parsing issue was addressed with improved checks. This issue is fixed in iOS 18.7.2 and iPadOS 18.7.2, iOS 26.1 and iPadOS 26.1, macOS Sequoia 15.7.2, macOS Sonoma 14.8.2, macOS Tahoe 26.1, visionOS 26.1, watchOS 26.1. An attacker may be able to cause a persistent denial-of-service.

Published: 2025-12-12 Last update: 2026-04-02 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2025-43494 is rated Moderate Risk (40.6/100): CVSS High severity, with low exploitation likelihood (EPSS 0.12%). Review affected assets and schedule 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-2025-43494

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 2026-04-03 0.20% 0.12% -0.08%
2 2025-12-18 0.10% 0.20% +0.10%
3 2025-12-16 — 0.10% —

Full EPSS history (4 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2025-43494

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
7.5 3.1 HIGH
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H 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:N)
Nobody has to click “OK” or open a trap file; it can work without a victim helping.
Scope (S:U)
Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:N)
Doesn’t really leak secrets in a meaningful way.
Integrity (I:N)
Data isn’t meaningfully altered or forged.
Availability (A:H)
Could take the service down hard or make it unusable for people who depend on it.
 3.9 3.6 134c704f-9b21-4f2e-91b3-4a467353bcc0

Weakness enumeration for CVE-2025-43494

Affected software / configurations for CVE-2025-43494

Vendor Product Version Raw CPE
apple ipados < 18.7.2 cpe:2.3:o:apple:ipados:*:*:*:*:*:*:*:*
apple ipados 26.0 cpe:2.3:o:apple:ipados:26.0:*:*:*:*:*:*:*
apple iphone_os < 18.7.2 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, < 14.8.2 cpe:2.3:o:apple:macos:*:*:*:*:*:*:*:*
apple macos >= 15.0, < 15.7.2 cpe:2.3:o:apple:macos:*:*:*:*:*:*:*:*
apple macos 26.0 cpe:2.3:o:apple:macos:26.0:*:*:*:*:*:*:*
apple visionos < 26.1 cpe:2.3:o:apple:visionos:*:*:*:*:*:*:*:*
apple watchos < 26.1 cpe:2.3:o:apple:watchos:*:*:*:*:*:*:*:*

References for CVE-2025-43494

URL Tags
https://support.apple.com/en-us/125632 Release Notes Vendor Advisory
https://support.apple.com/en-us/125633 Release Notes Vendor Advisory
https://support.apple.com/en-us/125634 Release Notes Vendor Advisory
https://support.apple.com/en-us/125635 Release Notes Vendor Advisory
https://support.apple.com/en-us/125636 Release Notes Vendor Advisory
https://support.apple.com/en-us/125638 Release Notes Vendor Advisory
https://support.apple.com/en-us/125639 Release Notes Vendor Advisory
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