CVE-2025-69542
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 Command Injection Vulnerability has been discovered in the DHCP daemon service of D-Link DIR895LA1 v102b07. The vulnerability exists in the lease renewal processing logic where the DHCP hostname parameter is directly concatenated into a system command without proper sanitization. When a DHCP client renews an existing lease with a malicious hostname, arbitrary commands can be executed with root privileges.
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 command injection vulnerability exists in the DHCP daemon service of D-Link DIR895LA1 firmware v102b07. During DHCP lease renewal, the hostname parameter from client requests is directly concatenated into a system command without input sanitization, allowing an attacker to inject arbitrary shell commands. These commands execute with root privileges, providing complete device compromise.
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= 102b07CVSS 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 device modelAccess the device web interface or check the device label to confirm the exact model is D-Link DIR895LA1Affected if The device is not a D-Link DIR895LA1 model, then this specific CVE does not apply
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Check the firmware versionIn the web interface, go to Status or System Info page to view the firmware version, or access the device via telnet/SSH and run 'cat /etc/version' or 'nvram get firmver'Affected if The firmware version is not exactly 102b07 - only version 102b07 is affected
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Verify DHCP server functionality is enabledIn the web interface under Network Settings or LAN setup, confirm the DHCP server is turned ON; or via CLI run 'ps | grep dhcpd' to see if the DHCP daemon process is runningAffected if The DHCP server is disabled or not running, the vulnerable code path is not reachable
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Confirm device is acting as DHCP serverCheck the LAN configuration to ensure the device is providing DHCP leases to clients; examine /tmp/udhcpc.leases or similar lease file if accessibleAffected if The device is configured as a DHCP client only and not serving addresses to other devices
You are affected only if you have a D-Link DIR895LA1 router running firmware exactly version 102b07 with the DHCP server feature enabled and actively serving IP addresses to clients.
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 dataReplace the affected device or apply vendor firmware update if available; alternatively, implement network segmentation to restrict untrusted DHCP clients and monitor for anomalous DHCP hostname requests.
- Consultation4.0 h
- Implementation8.0 h
- Testing6.0 h
- Review / QA2.0 h
An estimate, not a bill — we confirm scope with you before any work starts. Need it this week? Rush from $5,600.
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Free · runs locallyCheck whether your project pulls in CVE-2025-69542 — 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-2025-69542 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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