CVE-2018-5791
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 · uneditedAn issue was discovered in Extreme Networks ExtremeWireless WiNG 5.x before 5.8.6.9 and 5.9.x before 5.9.1.3. There is a Remote, Unauthenticated Heap Overflow in the HSD Process over the MINT (Media Independent Tunnel) Protocol on the WiNG Access Point via crafted packets.
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 remote, unauthenticated heap overflow vulnerability exists in the HSD (High-Speed Data) process of ExtremeWireless WiNG firmware versions 5.x before 5.8.6.9 and 5.9.x before 5.9.1.3. The vulnerability is triggered via crafted packets sent over the MINT (Media Independent Tunnel) protocol to WiNG Access Points, allowing potential remote code execution.
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>= 5.0, < 5.8.6.9>= 5.9.0, < 5.9.1.3CVSS 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
- High
- Privileges
- None
- User interaction
- None
- Scope
- Unchanged
- Confidentiality
- None
- Integrity
- None
- Availability
- High
CVSS:3.0/AV:N/AC:H/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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Identify firmware versionAccess the device CLI or web interface and retrieve the current firmware version from system information or version display commandsAffected if version is 5.x before 5.8.6.9 OR 5.9.x before 5.9.1.3
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Confirm product is ExtremeWireless WiNGVerify the device is running ExtremeWireless WiNG firmware specifically, not another Extreme Networks product lineAffected if product is ExtremeWireless WiNG with vulnerable version range
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Check HSD service statusDetermine if the High-Speed Data (HSD) process is enabled on the device - this is typically a configurable service in WiNG firmwareAffected if HSD process is enabled and running
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Verify MINT protocol exposureCheck if MINT protocol (Media Independent Tunnel) is accessible on the network - commonly uses UDP port 2435. This can be verified via port scanning or device service configurationAffected if MINT protocol is exposed to untrusted network segments
User is affected if the device runs ExtremeWireless WiNG firmware version 5.0 to 5.8.6.8 or 5.9.0 to 5.9.1.2, has HSD enabled, and has MINT protocol accessible to unauthenticated attackers.
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 data5.8.6.95.9.1.3
Upgrade ExtremeWireless WiNG firmware to version 5.8.6.9, 5.9.1.3, or later to remediate this vulnerability. If immediate patching is not feasible, consider network segmentation to limit exposure to untrusted networks.
- Consultation4.0 h
- Implementation8.0 h
- Testing6.0 h
- Review / QA2.0 h
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Free · runs locallyCheck whether your project pulls in CVE-2018-5791 — 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-2018-5791 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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