CVE-2025-40551
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 · uneditedSolarWinds Web Help Desk was found to be susceptible to an untrusted data deserialization vulnerability that could lead to remote code execution, which would allow an attacker to run commands on the host machine. This could be exploited without authentication.
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 confidenceSolarWinds Web Help Desk contains an unauthenticated deserialization vulnerability where untrusted data is being deserialized without proper validation, allowing remote attackers to execute arbitrary commands on the host machine by injecting malicious serialized objects.
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< 2026.1CVSS 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
- Network
- Complexity
- Low
- Privileges
- None
- User interaction
- None
- Scope
- Unchanged
- Confidentiality
- High
- Integrity
- High
- Availability
- High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/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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Identify installed SolarWinds Web Help Desk versionLog into the Web Help Desk admin interface and navigate to Help > About, or check the version displayed on the login page footer. Alternatively, check the installer or service information on the host where WHD is installed.Affected if The displayed version is any build number lower than 2026.1
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Confirm Web Help Desk web service is accessibleAttempt to access the WHD login page via HTTP/HTTPS from a remote system using the configured hostname or IP address and port (commonly 8080 or 8443).Affected if The login page loads without authentication, indicating the service is network-accessible
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Verify no network segmentation restricts accessReview firewall rules or network ACLs to determine if the WHD web service port is exposed to untrusted networks or the public internet.Affected if The service is reachable from networks beyond trusted administrative subnets, enabling unauthenticated attackers to reach the interface
Your environment is affected if SolarWinds Web Help Desk is installed at any version below 2026.1 and the web interface is accessible over the network without additional authentication barriers.
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 · scoped2026.1
Apply the vendor-provided security patch for CVE-2025-40551 immediately; until patch availability, consider network segmentation to limit exposure and deploy WAF/IPS rules to detect deserialization attack patterns.
Web Help Desk 2026.1
- Download Web Help Desk version 2026.1 from the official SolarWinds download portal
- Backup the current Web Help Desk configuration and database
- Stop the Web Help Desk service before upgrading
- Install version 2026.1 following the standard upgrade procedure
- Restart the Web Help Desk service after installation
- Verify the upgrade was successful by checking the version number in the admin interface
- Confirm normal operational functionality
Generated from the published advisory — verify against the referenced sources before acting.
- Consultation2.0 h
- Implementation4.0 h
- Testing6.0 h
- Review / QA3.0 h
An estimate, not a bill — we confirm scope with you before any work starts. Need it this week? Rush from $4,096.
Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2025-40551 — 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-2025-40551 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