CVE-2025-32818
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 Null Pointer Dereference vulnerability in the SonicOS SSLVPN Virtual office interface allows a remote, unauthenticated attacker to crash the firewall, potentially leading to a Denial-of-Service (DoS) condition.
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 · high confidenceA null pointer dereference vulnerability exists in the SonicOS SSLVPN Virtual Office interface. A remote, unauthenticated attacker can send specially crafted requests to the SSLVPN service, causing the firewall to dereference a null pointer and crash, resulting in a denial-of-service condition.
Verify against the referenced sources before acting — the references below are authoritative for this CVE, this summary is not.
CVSS 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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Confirm SonicOS deviceIdentify if the target is a SonicWall appliance running SonicOS firmware. Check the device model or run 'show system info' if accessible via CLIAffected if Not a SonicOS device - not affected
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Check SSLVPN Virtual Office statusLog into SonicWall management interface and navigate to VPN > SSL VPN > Settings, or probe the SSLVPN Virtual Office web portal (typically ports 443 or 4433) to confirm it is accessibleAffected if SSLVPN Virtual Office is disabled or not configured - not affected
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Determine SonicOS versionIn the SonicWall GUI go to System > Status, or use CLI command 'show version' to retrieve the installed SonicOS firmware version numberAffected if Version is within the vulnerable range - affected
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Assess SSLVPN exposure to untrusted networksReview firewall access rules or NAT policies to determine if the SSLVPN Virtual Office interface is reachable from external/untrusted networksAffected if SSLVPN is exposed to the internet or untrusted networks - directly affected
Affected if the system is a SonicWall device running SonicOS with SSLVPN Virtual Office enabled, the firmware version is within the vulnerable range, and the SSLVPN interface is accessible from 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.
From vendor dataApply the vendor-provided SonicOS firmware patch when available. As a temporary workaround, restrict access to the SSLVPN Virtual Office interface from untrusted networks using firewall access rules or VPN gateway filtering.
- Consultation4.0 h
- Implementation2.0 h
- Testing4.0 h
- Review / QA2.0 h
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Free · runs locallyCheck whether your project pulls in CVE-2025-32818 — 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-2025-32818 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
- No weaponised exploit code, or anything meant to cause harm
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