CVE-2023-35718
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 DAP-2622 DDP Change ID Password Auth Password Stack-based Buffer Overflow Remote Code Execution Vulnerability. This vulnerability allows network-adjacent attackers to execute arbitrary code on affected installations of D-Link DAP-2622 routers. Authentication is not required to exploit this vulnerability. The specific flaw exists within the DDP service. The issue results from the lack of proper validation of the length of user-supplied data prior to copying it to a fixed-length stack-based buffer. An attacker can leverage this vulnerability to execute code in the context of root. . Was ZDI-CAN-20061.
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 stack-based buffer overflow in the DDP service of D-Link DAP-2622 routers allows network-adjacent attackers to execute arbitrary code as root without authentication, due to insufficient length validation on user-supplied data before copying to a fixed-size stack buffer.
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= 1.00CVSS 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
- Low
- Privileges
- None
- User interaction
- None
- Scope
- Unchanged
- Confidentiality
- High
- Integrity
- High
- Availability
- High
CVSS:3.0/AV:A/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 router web interface or check the device label to confirm the model is D-Link DAP-2622Affected if The device is not a D-Link DAP-2622 router, then this CVE does not apply
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Check the firmware versionLog into the router web interface and navigate to Status or System Info section to view the firmware version, or use the command 'cat /proc/version' or 'nvram get firmver' via telnet/SSH if availableAffected if The firmware version is 1.00, then this specific version is affected by the vulnerability
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Verify the DDP service is enabledCheck if UDP port 5870 is listening by running 'netstat -uan | grep 5870' or 'ss -uan | grep 5870' on the router via telnet/SSH, or scan the router from the network using 'nmap -sU -p 5870 <router_ip>'Affected if UDP port 5870 is open and the DDP service is running, then the vulnerable service is exposed
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Confirm network accessibility to the DDP portFrom a network-adjacent host, attempt to reach the DDP service with 'nc -u <router_ip> 5870' or send a UDP packet to confirm the service respondsAffected if The DDP service (UDP 5870) is reachable from the network, then an attacker could exploit the buffer overflow
A user is affected if they have a D-Link DAP-2622 router running firmware version 1.00 with the DDP service (UDP port 5870) enabled and 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 dataRestrict network access to the DDP service (UDP port 5870) or disable it if possible until an official firmware patch is available from D-Link.
- Consultation3.0 h
- Implementation6.0 h
- Testing3.0 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 $3,984.
Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2023-35718 — 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-2023-35718 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
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