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Dir 825\/ee FirmwareOperating system · Dlink

CVE-2022-43644

HIGH · 8.8 CVSS v3.1 Published 2023-03-29
Fix available
A fix is available. Upgrade to after 1.0.9 or later.
See remediation →
93/100
Remediation priority · Urgent
No privileges Zero-click Patch available

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
This vulnerability allows network-adjacent attackers to execute arbitrary code on affected installations of D-Link DIR-825 1.0.9/EE routers. Authentication is not required to exploit this vulnerability. The specific flaw exists within the Dreambox plugin for the xupnpd service, which listens on TCP port 4044. 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 the admin user. Was ZDI-CAN-19461.

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
How this class of weakness works · CWE-78

User input reaches a shell or system command without being fully separated from the command itself, so an attacker can append their own instructions. Because these run with the application's privileges, it often means full control of the host. The lasting fix is to avoid the shell entirely — call APIs directly and pass arguments as data, never as concatenated strings.

General guidance for the os command injection class — the official description and references above are authoritative for this specific CVE. Want a bespoke review and a reviewed fix? Ask our team →

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 825\/ee FirmwareOperating system
Affected:<= 1.0.9
Dir 825\/ac FirmwareOperating system
Affected:<= 1.0.9

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

CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

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 a release after 1.0.9
Vendor patch supportannouncement.us.dlink.com →
Recommended fix Moderate confidence

D-Link DIR-825 firmware version later than 1.0.9 (check D-Link support announcement SAP10319 for exact fixed release)

  1. 1. Identify the current firmware version of the D-Link DIR-825 (either /EE or /AC variant) by accessing the router's web interface and navigating to the Status or Management section.
  2. 2. Visit the official D-Link support website and locate the firmware download section for the DIR-825 model.
  3. 3. Download the latest available firmware version for the DIR-825 from D-Link's official support page.
  4. 4. Access the router's web interface and navigate to the Firmware Upgrade or Management section.
  5. 5. Upload and apply the new firmware version, ensuring the router remains powered on throughout the upgrade process.
  6. 6. After the upgrade completes, verify the new firmware version is installed and test that the router's functionality is intact.
Caveat Firmware upgrades carry a risk of rendering the device inoperable if interrupted; ensure stable power during upgrade; some settings may need reconfiguration after upgrade

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

We can identify the exact fixed release, upgrade, and verify it in staging — typical engagement from $3,200. Get the upgrade done

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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-2022-43644 in production — separate from our analysis above.

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What this is

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What belongs here
  • Verified mitigations, workarounds, and config changes
  • Version or environment caveats, and links to real fixes
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