CVE-2025-43401
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 · uneditedA denial-of-service issue was addressed with improved validation. This issue is fixed in macOS Sequoia 15.7.2, macOS Sonoma 14.8.2, macOS Tahoe 26.1. A remote attacker may be able to cause a denial-of-service.
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 confidenceA denial-of-service vulnerability in macOS was addressed through improved input validation. The flaw allows a remote attacker to crash affected systems without authentication, likely by sending specially crafted input to a network-exposed service.
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< 14.8.2>= 15.0, < 15.7.2CVSS 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
- Network
- Complexity
- Low
- Privileges
- None
- User interaction
- None
- Scope
- Unchanged
- Confidentiality
- None
- Integrity
- None
- Availability
- High
CVSS:3.1/AV:N/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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Check installed macOS versionRun 'sw_vers -productVersion' in Terminal to get the exact macOS version numberAffected if The version is 14.8.2 or higher, or 15.7.2 or higher, then you are NOT affected. If the version is below 14.8.2 (for Sonoma) or between 15.0 and 15.7.1 (for Sequoia), you ARE affected.
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Identify macOS buildRun 'sw_vers -buildVersion' to see the specific build, which can help confirm the exact patch levelAffected if Compare your build against Apple's security content updates for 14.8.2 and 15.7.2 to confirm patch inclusion
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Determine if network services are exposedCheck System Settings > Network > Firewall and review any port forwarding, NAT, or exposed services configurations. In Terminal, run 'sudo lsof -i -P' to list network listenersAffected if If the macOS system has any network-exposed services (like file sharing, remote management, or custom network listeners) accessible from untrusted networks, the DoS vulnerability can be triggered remotely
You are affected if your macOS version is either Sonoma (14.x) below 14.8.2 or Sequoia (15.0-15.7.1), and the system has network services exposed to untrusted networks.
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 · scoped14.8.215.7.2
Apply the macOS security updates (Sequoia 15.7.2, Sonoma 14.8.2, or Tahoe 26.1) to all vulnerable systems. Prioritize externally-facing macOS systems.
macOS Sonoma 14.8.2+ or macOS Sequoia 15.7.2+ (depending on installed major version)
- Identify the current macOS version by clicking the Apple menu and selecting 'About This Mac'
- For macOS Sonoma (version 14.x): Update to macOS Sonoma 14.8.2 or later via System Settings > General > Software Update
- For macOS Sequoia (version 15.x): Update to macOS Sequoia 15.7.2 or later via System Settings > General > Software Update
- Restart the system after the update completes to ensure all security patches are applied
Generated from the published advisory — verify against the referenced sources before acting.
- Consultation2.0 h
- Implementation4.0 h
- Testing2.0 h
- Review / QA1.0 h
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Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2025-43401 — 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-2025-43401 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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- Verified mitigations, workarounds, and config changes
- Version or environment caveats, and links to real fixes
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