CVE-2026-41286
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 · uneditedStack-based Buffer Overflow vulnerability in the WatchGuard Agent discovery service on Windows allows Overflow Buffers. An unauthenticated attacker on the same local network could exploit this vulnerability to crash the agent 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 confidenceStack-based buffer overflow in the WatchGuard Agent discovery service on Windows. An unauthenticated attacker on the same local network can send specially crafted packets to overflow buffers and crash the agent 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< 1.25.03.0000CVSS 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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Verify WatchGuard Agent is installedOpen Windows Services console (services.msc) or check Programs and Features to locate WatchGuard Agent or related WatchGuard security softwareAffected if WatchGuard Agent software is present on the system
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Check installed WatchGuard Agent versionRight-click the WatchGuard Agent entry in Programs and Features and select Properties, or run 'Get-ItemProperty' on the installation directory if known, to view the Version fieldAffected if The displayed version number is lower than 1.25.03.0000
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Verify the discovery service exists and is runningOpen services.msc and look for a WatchGuard Agent-related service (such as 'WatchGuard Agent Discovery' or similar naming), check if its status is RunningAffected if The discovery service exists and is currently running
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Confirm network exposure of the discovery serviceRun 'netstat -an' or use PowerShell 'Get-NetTCPConnection' to identify if WatchGuard is listening on any UDP/TCP ports (common discovery ports), or check Windows Firewall rules for WatchGuard exceptionsAffected if The discovery service is bound to a network interface and listening for incoming packets from the local network
A system is affected if it runs WatchGuard Agent version below 1.25.03.0000 with the discovery service enabled and accessible on the local network.
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 · scoped1.25.03.0000
Apply WatchGuard vendor patches when available; network segmentation can limit attack surface by restricting local network access to the discovery service.
1.25.03.0000
- Identify all Windows systems running WatchGuard Agent versions prior to 1.25.03.0000
- Obtain the WatchGuard Agent version 1.25.03.0000 or later from WatchGuard's official distribution channels
- Deploy the upgrade to all affected systems, following standard change management procedures
- Restart the WatchGuard Agent service after upgrade completion
- Verify the agent service is running and the discovery service is functioning properly
Generated from the published advisory — verify against the referenced sources before acting.
- Consultation2.0 h
- Implementation3.0 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 $2,272.
Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2026-41286 — 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-2026-41286 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