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Dir X3260 FirmwareOperating system · Dlink

CVE-2023-44424

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 SetSysEmailSettings EmailTo 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 prog.cgi, 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-21158.

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 attackers to execute arbitrary code as root via the SetSysEmailSettings function in prog.cgi. The EmailTo parameter is not validated before being passed to a system call, enabling shell command injection. Although authentication is required, it can be bypassed.

MitigationApply vendor firmware updates when available; if no patch exists, disable remote web management or block ports 80/443 from untrusted networks to reduce attack surface.

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 the router model
    Locate the device label on the router or access the web management interface and check the model number displayed in the header or status page
    Affected if The device is not a D-Link DIR-X3260, then it is not affected by this specific CVE
  2. Check the firmware version
    Access the router web interface (typically at 192.168.0.1), navigate to the System or Status section, and locate the firmware version field. Compare against 1.04b01
    Affected if The installed firmware version is less than 1.04b01, meaning the device is within the affected version range
  3. Verify prog.cgi is accessible
    Attempt to access the URI /prog.cgi on the router's web interface (e.g., http://192.168.0.1/prog.cgi) using a browser or curl command
    Affected if The endpoint responds (returns any HTTP status other than 404), indicating the CGI interface is available for testing
  4. Check if remote web management is enabled
    In the router web interface, go to the Advanced or Management settings and look for Remote Management, Web Access, or Administration options to see if external access on ports 80/443 is permitted
    Affected if Remote management is enabled and ports 80/443 are exposed to untrusted networks, increasing exposure to this vulnerability even though authentication is required

The device is affected if it is a D-Link DIR-X3260 router running firmware version below 1.04b01 and the prog.cgi endpoint is accessible, regardless of whether remote management is enabled (since the authentication bypass makes local network attacks feasible).

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 updates when available; if no patch exists, disable remote web management or block ports 80/443 from untrusted networks to reduce attack surface.

Recommended fix Moderate confidence

D-Link DIR-X3260 Firmware version 1.04b01 or later

  1. 1. Download the firmware version 1.04b01 or later from the official D-Link support website for the DIR-X3260 router.
  2. 2. Access the router's web administration interface using a browser.
  3. 3. Navigate to the firmware upgrade section (typically under Administration or System Settings).
  4. 4. Upload the downloaded firmware file and initiate the upgrade process.
  5. 5. Wait for the upgrade to complete and the router to reboot automatically.
  6. 6. Verify the firmware version in the router's admin interface to confirm the upgrade was successful.
Caveat Firmware upgrades may reset router configurations to defaults; backup settings before upgrading if possible

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

Fix this in Dir X3260 Firmware Scoped from the published advisory
  • Consultation2.0 h
  • Implementation3.0 h
  • Testing2.0 h
  • Review / QA1.0 h
8.0 hours of engineering $1,420
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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-2023-44424 in production — separate from our analysis above.

No notes yet

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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