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Dir X3260 FirmwareOperating system · Dlink

CVE-2023-44426

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 AccountPassword 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-21160.

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 where the SetSysEmailSettings function in prog.cgi fails to validate user-supplied input before passing it to a system call. Although authentication is required, it can be bypassed, allowing attackers to execute arbitrary code with root privileges.

MitigationApply vendor firmware patches when available; if no patch exists, disable remote administration interfaces or isolate affected devices from untrusted networks.

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 the router web interface (typically at 192.168.0.1) and navigate to Status or Device Info page to confirm the model is D-Link DIR-X3260. Alternatively, check the device label on the physical router hardware.
    Affected if Device model is not D-Link DIR-X3260, then it is not affected by this specific CVE.
  2. Check installed firmware version
    In the router web interface, go to Maintenance > Firmware Upgrade or Status page and note the firmware version displayed. Compare against the affected version 1.04b01 - any version lower than 1.04b01 is vulnerable.
    Affected if Firmware version is less than 1.04b01 (for example, 1.04b00 or earlier).
  3. Verify if web administration interface is accessible
    Confirm the router's prog.cgi endpoint is reachable by accessing http://[router-ip]/prog.cgi. This is the vulnerable component containing the SetSysEmailSettings function.
    Affected if The prog.cgi endpoint responds to requests - this indicates the affected interface is exposed.
  4. Check if remote management is enabled
    In the router web interface, go to Advanced > Remote Management or Access Control settings. Verify whether remote access from WAN is permitted (any IP vs. specific IPs).
    Affected if Remote web administration (HTTP/HTTPS from WAN) is enabled, increasing exposure to network-based attackers.

A D-Link DIR-X3260 router with firmware version below 1.04b01 and an accessible web administration interface (especially if remote management is enabled) is affected by CVE-2023-44426.

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 patches when available; if no patch exists, disable remote administration interfaces or isolate affected devices from untrusted networks.

Recommended fix Moderate confidence

D-Link DIR-X3260 Firmware 1.04b01 or later

  1. Check current firmware version by logging into the router web interface and navigating to the Status or Management section
  2. Download the fixed firmware version 1.04b01 or later from D-Link's official support website (support.dlink.com)
  3. Navigate to the router's firmware upgrade section in the web interface
  4. Upload the downloaded firmware file and initiate the update process
  5. Wait for the router to reboot and complete the update
  6. Log back into the router and verify the firmware version has been updated to 1.04b01 or later
  7. After update, verify that the SetSysEmailSettings functionality works correctly
Caveat Firmware update may reset router configuration to defaults; backup current settings before upgrading

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
  • Implementation4.0 h
  • Testing3.0 h
  • Review / QA2.0 h
13.0 hours of engineering $2,330
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Scan for this in your stack

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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-2023-44426 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