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Dir X3260 FirmwareOperating system · Dlink

CVE-2023-44423

HIGH · 8.0 CVSS v3.1 Published 2024-05-03
Fix available
A fix is available. Upgrade to 1.04b01 or later.
See remediation →
82/100
Remediation priority · High
Zero-click

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 · unedited
D-Link DIR-X3260 SetTriggerPPPoEValidate Password Command Injection Remote Code Execution Vulnerability. This vulnerability allows network-adjacent attackers to execute arbitrary code on affected installations of D-Link DIR-X3260 routers. Although authentication is required to exploit this vulnerability, the existing authentication mechanism can be bypassed. The specific flaw exists within the prog.cgi program, which handles HNAP requests made to the lighttpd webserver listening on TCP ports 80 and 443. The issue results from the lack of proper validation of a user-supplied string before using it to execute a system call. An attacker can leverage this vulnerability to execute code in the context of root. Was ZDI-CAN-21157.

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 confidence

Command injection vulnerability in D-Link DIR-X3260 routers allows authenticated or authentication-bypassing attackers to execute arbitrary code via prog.cgi handling HNAP requests. The flaw stems from improper validation of user-supplied input before passing it to a system call, resulting in root-level code execution.

MitigationApply vendor firmware update when available; if unavailable, restrict network access to management interfaces (ports 80/443) and consider replacing affected devices.

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
Dir X3260 FirmwareOperating system
Affected:< 1.04b01

CVSS 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
Low
User interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High

CVSS:3.1/AV:A/AC:L/PR:L/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 checks

Work through these to decide whether this CVE applies to you.

  1. Identify device model
    Access router web interface or check device label; look for 'DIR-X3260' model identification in management pages or SNMP/DHCP lease information
    Affected if Device is not a D-Link DIR-X3260 (not affected)
  2. Check firmware version
    Log into router web interface, navigate to Status or Management page to view firmware version; alternatively, use grep or pattern matching on uhttpd binary if you have shell access: 'strings /usr/sbin/uhttpd | grep -i version' or check /etc/osrelease
    Affected if Firmware version is 1.04b01 or higher (not affected)
  3. Verify management interface exposure
    Scan external IP or perform Nmap check: 'nmap -p 80,443 <router_public_ip>' or check port forwarding/firewall rules to determine if HTTP/HTTPS management ports are accessible from WAN
    Affected if Ports 80 or 443 are exposed to untrusted networks (attack surface exists)
  4. Confirm HNAP service availability
    Send HTTP GET request to router: 'curl -s http://<router_ip>/HNAP1/' or check if /HNAP1 endpoint responds with XML SOAP interface
    Affected if HNAP interface is accessible and responds (vulnerability trigger point available)

User is affected if device is a D-Link DIR-X3260 with firmware below 1.04b01 AND the management interface (ports 80/443) with HNAP is accessible to the attacker.

Generated from the published advisory. Verify against your own configuration.

Check your environment

Paste your version and any relevant configuration and it will be compared against the affected criteria above. Do not include secrets or credentials.

AI-assisted, checked against the advisory. Informational, not a guarantee.

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 · scoped
Upgrade available Upgrade to 1.04b01 or later
Fixed in 1.04b01
Interim mitigation

Apply vendor firmware update when available; if unavailable, restrict network access to management interfaces (ports 80/443) and consider replacing affected devices.

Recommended fix Moderate confidence

D-Link DIR-X3260 Firmware 1.04b01 or later

  1. 1. Identify the current firmware version of the D-Link DIR-X3260 router by accessing the web management interface at http://192.168.0.1 or https://192.168.0.1 and navigating to Status > Firmware Upgrade
  2. 2. Navigate to the D-Link support page for the DIR-X3260 model at https://support.dlink.com/
  3. 3. Locate and download the latest firmware version. Based on the affected version range (< 1.04b01), obtain firmware version 1.04b01 or later from D-Link's official support downloads
  4. 4. Access the router's web interface, go to Tools > Firmware Upgrade (or similar location)
  5. 5. Upload the downloaded firmware file and allow the router to complete the upgrade process - do not power off the device during this operation
  6. 6. After the router reboots, verify the new firmware version is installed and confirm the upgrade was successful
  7. 7. As a security best practice following this RCE vulnerability, change the administrator password and review access controls
Caveat Standard router firmware upgrade risks apply - ensure backup of configuration if possible and do not interrupt power during the flashing process

Generated from the published advisory — verify against the referenced sources before acting.

Fix this in Dir X3260 Firmware Scoped from the published advisory
  • Consultation4.0 h
  • Implementation8.0 h
  • Testing6.0 h
  • Review / QA2.0 h
20.0 hours of engineering $3,500
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References Go to the primary sourcePrimary sources — vendor advisories, patches and trackers. Where our summary and a reference disagree, the reference wins.

Primary sources

Practitioner notes

Contributed

Peer-ranked notes from engineers who’ve handled CVE-2023-44423 in production — separate from our analysis above.

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What this is

A place for practitioners to share what actually worked: a mitigation you’ve tested, a configuration change, a version- or environment-specific caveat, or a link to a verified patch. The most useful notes rise to the top as peers upvote them, so the signal stays high.

What belongs here
  • 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
  • No spam, self-promotion, credentials, or personal data