CVE-2020-5685
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 · uneditedUNIVERGE SV9500 series from V1 to V7and SV8500 series from S6 to S8 allows an attacker to execute arbitrary OS commands or cause a denial-of-service (DoS) condition by sending a specially crafted request to a specific URL.
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 critical command injection vulnerability in NEC UNIVERGE SV9500 (V1-V7) and SV8500 (S6-S8) series phone systems allows unauthenticated attackers to execute arbitrary OS commands or cause denial of service by sending specially crafted requests to a specific URL endpoint.
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>= v1, <= v7>= s6, <= s8CVSS 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
- None
- User interaction
- None
- Scope
- Unchanged
- Confidentiality
- High
- Integrity
- High
- Availability
- High
CVSS:3.1/AV:N/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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Identify NEC UNIVERGE modelDetermine whether the phone system is an SV9500 or SV8500 series by checking the device label, admin interface, or firmware metadataAffected if The device is a NEC UNIVERGE SV9500 or SV8500 series phone system
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Check SV9500 firmware versionAccess the device admin console or system information page and locate the firmware version. Compare it against the affected range V1 through V7Affected if SV9500 firmware version is between V1 and V7 inclusive
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Check SV8500 firmware versionAccess the device admin console or system information page and locate the firmware version. Compare it against the affected range S6 through S8Affected if SV8500 firmware version is between S6 and S8 inclusive
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Verify network accessibility of vulnerable endpointReview network configuration, firewall rules, and perimeter ACLs to determine if the specific URL endpoint associated with this vulnerability is reachable from untrusted networksAffected if The vulnerable URL endpoint is exposed to external or untrusted networks without authentication
The environment is affected if it runs a NEC UNIVERGE SV9500 (V1-V7) or SV8500 (S6-S8) with the vulnerable endpoint accessible from the 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.
From vendor dataApply vendor patches immediately if available; if no patch exists, implement strict network access controls, isolate affected systems behind firewalls, and block the vulnerable URL at the network perimeter to prevent external exploitation.
- Consultation6.0 h
- Implementation8.0 h
- Testing4.0 h
- Review / QA3.0 h
An estimate, not a bill — we confirm scope with you before any work starts. Need it this week? Rush from $6,048.
Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2020-5685 — 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-2020-5685 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