CVE-2016-8781
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 · uneditedHuawei Secospace USG6300 with software V500R001C20 and V500R001C20SPC200PWE, Secospace USG6500 with software V500R001C20, Secospace USG6600 with software V500R001C20 and V500R001C20SPC200PWE allow remote attackers with specific permission to log in to a device and deliver a large number of unspecified commands to exhaust memory, causing a 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 · moderate confidenceMemory exhaustion denial-of-service vulnerability in Huawei Secospace USG6300, USG6500, and USG6600 firewall appliances. Authenticated attackers with specific administrative permissions can log in and deliver a large volume of unspecified commands, causing memory exhaustion and device crash.
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= v500r001c20= v500r001c20spc200pwe= v500r001c20= v500r001c20= v500r001c20spc200pweCVSS 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
- Low
- User interaction
- None
- Scope
- Unchanged
- Confidentiality
- None
- Integrity
- None
- Availability
- High
CVSS:3.0/AV:N/AC:L/PR:L/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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Identify USG appliance modelLog into the device management interface or use the 'display device' command via CLI to confirm the exact model number (USG6300, USG6500, or USG6600)Affected if Model is USG6300, USG6500, or USG6600
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Check installed firmware versionExecute 'display version' or 'display firmware version' command in the device CLI to retrieve the currently running firmware versionAffected if Version is v500r001c20 or v500r001c20spc200pwe
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Verify administrative access is enabledReview user accounts and AAA configuration using 'display user-interface' and 'display authentication scheme' commands to confirm administrative accounts exist and are activeAffected if Authenticated administrative accounts are configured and accessible
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Check for memory exhaustion symptomsRun 'display memory usage' or 'display system memory' command to inspect current memory utilization; look for unusually high memory consumption approaching 100%Affected if Memory usage is abnormally high or the device exhibits slowness prior to crashes
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Review command audit logs for unusual activityUse 'display logbuffer' or check syslog/audit logs for a high volume of commands from any single administrative session that may indicate exploitation attemptsAffected if Logs show a large volume of commands from authenticated sessions causing unusual system load
The device is affected if it is a USG6300, USG6500, or USG6600 running firmware v500r001c20 or v500r001c20spc200pwe and has authenticated administrative access enabled, allowing an attacker to send bulk commands and exhaust memory.
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 vendor-provided patches (V500R001C20SPC200PWE or later) to affected USG firmware versions. Until patched, limit administrative access to trusted personnel only and monitor for unusual command activity.
- Consultation4.0 h
- Implementation6.0 h
- Testing4.0 h
- Review / QA2.0 h
An estimate, not a bill — we confirm scope with you before any work starts. Need it this week? Rush from $4,544.
Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2016-8781 — 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-2016-8781 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
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