CVE-2026-3485
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 · uneditedA flaw has been found in D-Link DIR-868L 110b03. This affects the function sub_1BF84 of the component SSDP Service. This manipulation of the argument ST causes os command injection. It is possible to initiate the attack remotely. The exploit has been published and may be used. This vulnerability only affects products that are no longer supported by the maintainer.
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 confidenceOS command injection vulnerability in D-Link DIR-868L router firmware 110b03. The SSDP Service function sub_1BF84 fails to sanitize the ST parameter before passing it to system shell, allowing remote attackers to execute arbitrary OS commands.
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= 110b03CVSS 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 the router modelCheck the device label or access the router's web interface and look for the model number (DIR-868L)Affected if The device is not a D-Link DIR-868L router, the vulnerability does not apply
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Check the installed firmware versionAccess the router's web admin interface (typically at 192.168.0.1) and navigate to Status or Management section to view the firmware version, or use telnet/SSH if enabled to run 'cat /proc/version' or check /etc/firmware_versionAffected if The firmware version is not 110b03 (only exactly version 110b03 is affected)
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Verify SSDP service is runningFrom a local network host, run 'upnp-ant-toolkit-ssdp' or use a UPnP discovery tool to send an M-SEARCH request for SSDP (multicast to 239.255.255.250:1900) and observe if the D-Link respondsAffected if The SSDP service is not responding or not enabled on the device
You are affected only if you have a D-Link DIR-868L router running exactly firmware version 110b03 with the SSDP service enabled and accessible on your 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.
dbcve · scopedSince the device is End-of-Life and no longer supported by D-Link, replace the device with a currently supported model. If immediate replacement is not feasible, restrict network access to the SSDP service (UDP port 1900) via firewall rules or network segmentation.
- Implement network segmentation to isolate the D-Link DIR-868L device on a separate VLAN
- Configure firewall rules to block incoming SSDP (UDP port 1900) traffic from untrusted networks
- Disable the SSDP service on the device if possible through the web interface
- If the device cannot be retired, monitor network traffic for suspicious SSDP packets with malformed ST parameters
- Consider replacing the end-of-life D-Link DIR-868L with a currently supported router that receives security updates
Generated from the published advisory — verify against the referenced sources before acting.
- Consultation4.0 h
- Implementation8.0 h
- Testing3.0 h
- Review / QA2.0 h
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Free · runs locallyCheck whether your project pulls in CVE-2026-3485 — 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-2026-3485 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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