CVE-2021-39995
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 · uneditedSome Huawei products use the OpenHpi software for hardware management. A function that parses data returned by OpenHpi contains an out-of-bounds read vulnerability that could lead to a denial of service. Affected product versions include: eCNS280_TD V100R005C10; eSE620X vESS V100R001C10SPC200, V100R001C20SPC200, V200R001C00SPC300.
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 confidenceAn out-of-bounds read vulnerability exists in a function that parses data returned by OpenHpi software in affected Huawei products. This memory access violation can cause the application to crash, leading to denial of service. The vulnerability stems from insufficient bounds checking during data parsing operations.
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= v100r005c10= v100r001c10spc200= v100r001c20spc200= v200r001c00spc300CVSS 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:3.1/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 the product modelCheck the hardware model of the Huawei device to determine if it is an eCNS280 TD or eSE620X Vess device. This can typically be found in the device management interface, system information, or physical label.Affected if The device model is eCNS280 TD or eSE620X Vess
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Check eCNS280 TD firmware versionAccess the device management interface or use the firmware version check command (such as 'display version' or through the web interface) to determine the installed firmware version.Affected if The firmware version is exactly v100r005c10
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Check eSE620X Vess firmware versionAccess the device management interface or use the firmware version check command to determine the installed firmware version on the eSE620X Vess device.Affected if The firmware version is exactly v100r001c10spc200, v100r001c20spc200, or v200r001c00spc300
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Verify OpenHpi usageCheck if the OpenHpi service or functionality is enabled on the device. This may involve reviewing the running services, modules, or configuration settings related to hardware management interfaces.Affected if OpenHpi data parsing functionality is actively in use on the device
A user is affected if they are running an eCNS280 TD device with firmware v100r005c10 or an eSE620X Vess device with firmware v100r001c10spc200, v100r001c20spc200, or v200r001c00spc300, and the OpenHpi data parsing feature is enabled.
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 the vendor-provided firmware/patch updates for the affected product versions (eCNS280_TD V100R005C10; eSE620X vESS V100R001C10SPC200, V100R001C20SPC200, V200R001C00SPC300). If patching is not immediately possible, consider network segmentation to limit exposure of the hardware management interface.
- Consultation4.0 h
- Implementation8.0 h
- Testing4.0 h
- Review / QA2.0 h
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Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2021-39995 — 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-2021-39995 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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