CVE-2019-3915
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 · uneditedAuthentication Bypass by Capture-replay vulnerability in Verizon Fios Quantum Gateway (G1100) firmware version 02.01.00.05 allows an unauthenticated attacker with adjacent network access to intercept and replay login requests to gain access to the administrative web interface.
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 confidenceThe Verizon Fios Quantum Gateway G1100 firmware 02.01.00.05 contains a capture-replay authentication bypass vulnerability. An attacker with adjacent network access (same local network) can intercept login requests and replay them to gain unauthenticated administrative access to the web interface, likely due to missing session tokens, nonces, or cryptographic freshness checks in the authentication mechanism.
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= 02.01.00.05CVSS 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
- High
- Privileges
- None
- User interaction
- None
- Scope
- Unchanged
- Confidentiality
- High
- Integrity
- High
- Availability
- High
CVSS:3.0/AV:A/AC:H/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 the firmware versionLog into the router web interface and navigate to the System or Status page to view the firmware version, or check the device label on the router itselfAffected if The firmware version is exactly 02.01.00.05
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Confirm web interface accessibilityAttempt to access the router web interface by entering the router IP address in a web browser from a device on the same local networkAffected if The login page loads without requiring prior authentication or session validation
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Verify authentication mechanismUse a packet capture tool to intercept a login request when authenticating to the router, then attempt to replay that exact requestAffected if The replayed request is accepted and grants administrative access, indicating missing nonce, token, or freshness checks
A user is affected if the router runs firmware version 02.01.00.05 AND the authentication can be bypassed via replaying a captured login request.
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 firmware updates when available; until then, restrict physical and network access to trusted users only, segment the router from untrusted devices, and monitor for unauthorized administrative access attempts.
- 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-2019-3915 — 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-2019-3915 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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- Version or environment caveats, and links to real fixes
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