CVE-2025-43424
Official description Straight from the sourceThe vendor's or NVD's own wording, published unedited. Authoritative, but often terse — it says what broke, rarely what to do.
NVD · uneditedThe issue was addressed with improved bounds checks. This issue is fixed in iOS 26.1 and iPadOS 26.1, macOS Tahoe 26.1. A malicious HID device may cause an unexpected process crash.
Technical summary Written by usOur analysis, written from the advisory, the CVSS vector and the affected-version data. It adds context the advisory leaves out, and never invents facts that are not in the source.
dbcve analysis · moderate confidenceThis is a bounds check vulnerability in the HID (Human Interface Device) subsystem of iOS, iPadOS, and macOS Tahoe. A malicious HID device can exploit inadequate bounds checking to trigger an out-of-bounds memory access, resulting in an unexpected process crash. The vulnerability is fixed in version 26.1 of the affected operating systems through improved bounds checks.
Verify against the referenced sources before acting — the references below are authoritative for this CVE, this summary is not.
Affected products & versions What the vendor confirmedThe version ranges the vendor confirmed as vulnerable. If your version sits inside a range here, treat yourself as exposed until you have upgraded.
NVD · CPE data< 26.1< 26.1CVSS breakdown How the score is builtThe industry scoring standard. It rates how the flaw is reached, what it takes to exploit, and what an attacker gains — the score is derived from those, not the other way round.
From the vector- Attack vector
- Adjacent
- Complexity
- Low
- Privileges
- None
- User interaction
- None
- Scope
- Unchanged
- Confidentiality
- None
- Integrity
- None
- Availability
- High
CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Am I affected? How to checkSteps we derive from the advisory and the affected-version data, so you can decide whether this CVE reaches your setup. They are a guide, not a scan — your own configuration is the authority.
dbcve checksWork through these to decide whether this CVE applies to you.
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Confirm device is iPhone or iPadGo to Settings > General > About > Model Name to verify the device is an Apple iPhone or iPadAffected if Device is an iPhone or iPad running iOS or iPadOS
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Check iOS/iPadOS versionNavigate to Settings > General > About > Version to view the installed iOS or iPadOS version numberAffected if Version shown is below 26.1 (for example, 25.x or earlier)
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Verify via Software UpdateGo to Settings > General > Software Update to confirm the available iOS/iPadOS version and compare to 26.1Affected if Device reports an update to 26.1 is available, indicating current version is older
The device is affected if it is an iPhone or iPad running iOS or iPadOS version 26.0 or lower, since the fix is in version 26.1
Generated from the published advisory. Verify against your own configuration.
Remediation Closing itWhat it takes to close this. Where a vendor fix exists we point at it; where none exists we say so plainly, and can build one. Effort estimates are scoped from the advisory, not from your codebase.
dbcve · scoped26.1
Apply the vendor-supplied updates (iOS 26.1, iPadOS 26.1, or macOS Tahoe 26.1) to all affected devices. In enterprise environments, verify HID device policies and consider restricting unknown USB peripherals until patches are deployed.
iOS 26.1 and iPadOS 26.1
- Back up your iPhone or iPad using iCloud or your computer before updating
- Connect your device to Wi-Fi and power
- Go to Settings > General > Software Update on your iPhone or iPad
- Download and install iOS 26.1 or iPadOS 26.1 when available
- Restart your device after the update completes
Generated from the published advisory — verify against the referenced sources before acting.
- Consultation2.0 h
- Implementation1.0 h
- Testing2.0 h
- Review / QA1.0 h
An estimate, not a bill — we confirm scope with you before any work starts. Need it this week? Rush from $1,696.
Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2025-43424 — or any other known-vulnerable package — straight from your lock files. Free and open source; it runs locally and uploads nothing.
References Go to the primary sourcePrimary sources — vendor advisories, patches and trackers. Where our summary and a reference disagree, the reference wins.
Primary sourcesPractitioner notes
ContributedPeer-ranked notes from engineers who’ve handled CVE-2025-43424 in production — separate from our analysis above.
The advisory tells you what broke. It rarely tells you what actually worked. If you’ve dealt with this one, that detail is what the next engineer is searching for.
- The version that genuinely resolved it — not the one the vendor claimed
- A config change or rule that shut the vector down
- A gotcha in the upgrade path that cost you an afternoon
No notes yet
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A place for practitioners to share what actually worked: a mitigation you’ve tested, a configuration change, a version- or environment-specific caveat, or a link to a verified patch. The most useful notes rise to the top as peers upvote them, so the signal stays high.
- Verified mitigations, workarounds, and config changes
- Version or environment caveats, and links to real fixes
- No weaponised exploit code, or anything meant to cause harm
- No spam, self-promotion, credentials, or personal data