CVE-2016-7811
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 · uneditedCorega CG-WLR300NX firmware Ver. 1.20 and earlier allows an attacker on the same network segment to bypass access restriction to perform arbitrary operations via unspecified vectors.
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 confidenceThe Corega CG-WLR300NX router firmware versions 1.20 and earlier contains an access restriction bypass vulnerability. An attacker positioned on the same network segment can circumvent authentication or authorization controls to execute arbitrary operations on the device. The exact exploitation vector is not specified in the advisory.
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<= 1.20CVSS 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
- High
- Integrity
- High
- Availability
- High
CVSS:3.0/AV:A/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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Confirm device modelLog into the router admin interface or check the device label to verify the exact model is Corega CG-WLR300NXAffected if The device is not a Corega CG-WLR300NX (different models have different vulnerability statuses)
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Identify installed firmware versionAccess the router web administration panel and navigate to the System or Status section to view the firmware version. Alternatively, check the device documentation or backup configuration file for version information.Affected if The firmware version is 1.20 or lower, or if the version cannot be determined (unknown versions should be treated as vulnerable)
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Check firmware version formatReview the firmware version string carefully - some vendors include build numbers or revision suffixes. Compare the numeric portion against 1.20.Affected if The firmware version displays as 1.20, 1.20.x, or any version earlier than 1.21
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Assess network exposureVerify whether the router management interface is accessible from external or untrusted network segments. The vulnerability requires an attacker on the same network segment.Affected if The router admin interface is accessible from network segments beyond the trusted local LAN (e.g., from guest networks, DMZ, or WAN interface)
If the device is a Corega CG-WLR300NX with firmware version 1.20 or earlier, and an attacker can reach it from the local network segment, the environment is affected by this vulnerability.
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 dataUpgrade to firmware version 1.21 or later if available. If no patch exists, consider replacing the device with a currently supported model. Network segmentation and VLAN isolation can limit the attack surface by restricting local network access.
- Consultation2.0 h
- Implementation4.0 h
- Testing3.0 h
- Review / QA2.0 h
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Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2016-7811 — 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-2016-7811 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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