CVE-2023-39674
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 · uneditedD-Link DIR-880 A1_FW107WWb08 was discovered to contain a buffer overflow via the function fgets.
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 confidenceD-Link DIR-880 router firmware A1_FW107WWb08 contains a buffer overflow vulnerability in the fgets function, allowing potential remote code execution or denial of service via specially crafted input.
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= 107wwb08CVSS 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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Confirm router model is D-Link DIR-880LCheck the device label on the router or log into the web interface and navigate to Status or System Information to verify the model number is DIR-880LAffected if Router is not a D-Link DIR-880L (different models are not affected)
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Identify installed firmware versionLog into the router web interface, go to Tools > System or Status page, and locate the firmware version field. Alternatively, check the file name of the firmware if you have access to the firmware file or backup.Affected if Firmware version is exactly A1_FW107WWb08 (other versions of DIR-880L may have different status)
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Determine if management interface is network accessibleCheck router web interface settings under Setup > Network Settings or Administration > Remote Management to see if the HTTP/HTTPS management port is bound to WAN (internet-facing) or LAN onlyAffected if Remote administration is enabled and the management interface is accessible from WAN (the attack vector involves specially crafted input sent to the device)
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Verify if vulnerable service is activeCheck if common D-Link services like httpd, minhttpd, or similar web services are running. On the router, this may be visible in Status > Device Information or via SSH/Telnet if enabledAffected if The web service handling HTTP requests is running and accessible (this is the likely attack surface for the fgets buffer overflow)
The environment is affected if it is a D-Link DIR-880L router running firmware version A1_FW107WWb08 and the management interface or web service is network-accessible to receive the specially crafted input.
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 latest firmware if available; otherwise, restrict network access to the device's management interface and disable remote administration.
- Consultation8.0 h
- Implementation24.0 h
- Testing16.0 h
- Review / QA8.0 h
An estimate, not a bill — we confirm scope with you before any work starts. Need it this week? Rush from $15,616.
Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2023-39674 — 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-2023-39674 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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