CVE-2025-43400

mediumpriority · track · 12EPSS 0.070 · 94 %ileexploit · PoCDEEURUUS

grimoire priorityP1 · Urgent

Exploitable?

Public exploit

1 exploit · PoC

Likely / severe?

6.96% (94th) EPSS

CVSS 6.3 · medium

Is it mine?

38 products

Check your exposure

Who says so?

4 sources

cnnvd · enisa_euvd · fstec_bdu · cert_bund

EPSS · scored 2026-10-27

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.

cvss

Technical severity, 0–10. One row per scoring source.

6.3

010

base score 0–10 · higher = more severe · hover a vector to decode

v3.16.3mediumAV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:Lsecondary · FSTEC (BDU) RU

v3.16.3mediumCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:Lsecondary · ENISA EU

v3.16.3mediumCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:Lsecondaryexploitability 2.8 · impact 3.4

v3.16mediumCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:L/E:Psecondary · CVSS-BT (t0sche)

ssvc

A stakeholder decision — act, attend, or track — from exploitation and impact.

Trackcoordinatorcisa_ssvcUS

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-787USCWE-787US

exploits (1)

Public proof-of-concept and weaponised exploit code.

csrXamfi/CVE-2025-43400CVE-2025-43400 (video + report)PoC · poc_in_github

affected products (38)

Products and version ranges known to be affected.

Apple iOS <18.7.1all versionscert_bundDE
Apple iOS <26.0.1all versionscert_bundDE
Apple iPadOS <18.7.1all versionscert_bundDE
Apple iPadOS <26.0.1all versionscert_bundDE
Apple macOS Sequoia <15.7.1all versionscert_bundDE
Apple macOS Sonoma <14.8.1all versionscert_bundDE
Apple macOS Tahoe <26.0.1all versionscert_bundDE
Apple IOS< 18.7.1cert_bundDE
Apple IOS< 26.0.1cert_bundDE
Apple iPadOS< 18.7.1cert_bundDE
Apple iPadOS< 26.0.1cert_bundDE
Apple macOS≤ Sequoia <15.7.1cert_bundDE
Apple macOS≤ Sonoma <14.8.1cert_bundDE
Apple macOS≤ Tahoe <26.0.1cert_bundDE
Apple iOS and iPadOS0 → 18.7.1enisa_euvdEU
Apple iOS and iPadOS0 → 26.0.1enisa_euvdEU
Apple macOS0 → 14.8.1enisa_euvdEU
Apple macOS0 → 15.7.1enisa_euvdEU
Apple macOS0 → 26.0.1enisa_euvdEU
Apple tvOS0 → 26.1enisa_euvdEU

showing 20 of 38

advisories (1)

Vendor and ecosystem advisories describing this.

WID-SEC-W-2025-2157Apple iOS, iPadOS and macOS (Font Parser): Schwachstelle ermöglicht Denial of ServiceDeutsch2025-09-29csaf · cert_bundDE
Ein entfernter, anonymer Angreifer kann diese Schwachstelle in Apple iOS, Apple iPadOS und Apple macOS ausnutzen, um einen Denial of Service Angriff durchzuführen oder den Prozessspeicher zu beschädigen, wodurch andere nicht näher spezifizierte Angriffe ermöglicht werden.

also known as (4)

Other names and identifiers for this entity.

sources

Which sources assert this record, and when.

cnnvd enisa_euvd fstec_bdu cert_bund NVD CVE.org MITRE

published 2025-09-29modified 2026-10-18

references (30)

External citations — patches, advisories, analysis.

scry

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