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Dir 645 FirmwareOperating system · Dlink

CVE-2025-10689

CRITICAL · 9.8 CVSS v3.1 Published 2025-09-18
Mitigation only
No fix yet — a mitigation exists. There is no fixed release. A documented workaround reduces exposure in the meantime.
See remediation →
100/100
Remediation priority · Urgent
Public exploit Remotely reachable No privileges 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
A vulnerability was identified in D-Link DIR-645 105B01. This issue affects the function soapcgi_main of the file /soap.cgi. Such manipulation of the argument service leads to command injection. The attack can be launched remotely. The exploit is publicly available and might be used. This vulnerability only affects products that are no longer supported by the maintainer.

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

A command injection vulnerability exists in the soapcgi_main function of /soap.cgi on D-Link DIR-645 firmware 105B01. The 'service' parameter is not properly sanitized before being passed to system execution, allowing unauthenticated remote attackers to inject and execute arbitrary operating system commands. This is a pre-authentication flaw with publicly available exploits.

MitigationSince D-Link DIR-645 is end-of-life and no longer supported, no vendor patch will be released. Organizations should immediately isolate the device behind a firewall, restrict network access to only authorized management IPs, or replace the unsupported device with a currently supported alternative.

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 645 FirmwareOperating system
Affected:= 1.05b01

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
Network
Complexity
Low
Privileges
None
User interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High

CVSS:3.1/AV:N/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 checks

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

  1. Identify the device model
    Access the router web interface (typically 192.168.0.1) and navigate to Status or Device Information page to confirm the model is D-Link DIR-645
    Affected if The device is not a D-Link DIR-645 router, then it is not affected by this specific CVE
  2. Check the firmware version
    In the router web interface, go to Administration > Firmware or Status page and locate the firmware version field
    Affected if The firmware version is 1.05b01, then it matches the affected version exactly; versions other than 1.05b01 are not affected by this CVE
  3. Verify if the soap.cgi endpoint is accessible
    Send an HTTP GET request to http://<router_ip>/soap.cgi (or /cgi-bin/soap.cgi) using curl or a browser
    Affected if The endpoint responds with any HTTP status (200, 404, etc.), indicating the CGI interface is present on the device; if the endpoint does not exist or returns host not found, the device may not have this service enabled
  4. Confirm remote management is enabled
    In the router web interface, go to Advanced > Remote Management or Access Control settings and check if Remote Management is set to Enable, and note the allowed IP range
    Affected if Remote Management is enabled and allows access from untrusted IPs (0.0.0.0 or wide ranges), the device is exposed to remote attack; if remote management is disabled, the attack surface is limited to local network only

The device is affected if it is a D-Link DIR-645 running firmware version 1.05b01 with the /soap.cgi endpoint accessible, particularly when remote management is enabled exposing the device to untrusted networks.

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
Mitigation available No clean upgrade yet — mitigate in the meantime
Mitigation

Since D-Link DIR-645 is end-of-life and no longer supported, no vendor patch will be released. Organizations should immediately isolate the device behind a firewall, restrict network access to only authorized management IPs, or replace the unsupported device with a currently supported alternative.

Recommended fix High confidence
  1. 1. Replace the D-Link DIR-645 with a currently supported router from D-Link or another vendor, as this device is End-of-Life and no longer receives security updates.
  2. 2. If replacement is not immediately possible, isolate the device on a restricted network segment with firewall rules that block external access to the device's IP address.
  3. 3. Disable remote management interfaces on the router if not required, restricting administrative access to internal network only.
  4. 4. Monitor for any unauthorized access attempts or unusual network activity.
  5. 5. Contact D-Link support to confirm the EOL status and inquire about any available trade-in programs for newer hardware.
Caveat The DIR-645 is End-of-Life with no security support; the only remediation is device replacement rather than patching.

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

Fix this in Dir 645 Firmware Scoped from the published advisory
  • Consultation2.0 h
  • Implementation4.0 h
  • Testing2.0 h
  • Review / QA1.0 h
9.0 hours of engineering $1,600
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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-2025-10689 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
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