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Vulnerabilities

Vulnerability · CVE-2019-17621

D-Link DIR-859 Router Command Execution Vulnerability

Published Dec 30, 2019 · catalog updated Jun 16, 2026 · D-Link DIR-859 Router

Patch now

CVE-2019-17621 is in the CISA known-exploited catalog, due Jul 20, 2023. Confirm D-Link DIR-859 Router against the vendor advisory and apply that fix. The CVSS score does not change the priority.

Severity
Critical9.8
Known exploitation
CISA KEV and VulnCheck KEV
EPSS
89.62%
Remediation
Remediation guidance
Affected products
cpe dlink/dir-822 firmware · cpe dlink/dir-823 firmware · cpe dlink/dir-859 firmware · cpe dlink/dir-865l firmware · cpe dlink/dir-868l firmware · cpe dlink/dir-869 firmware

D-Link DIR-859 router contains a command execution vulnerability in the UPnP endpoint URL, /gena.cgi. Exploitation allows an unauthenticated remote attacker to execute system commands as root by sending a specially crafted HTTP SUBSCRIBE request to the UPnP service when connecting to the local network. Initial-access exploit intelligence.

Are you affected?

Enter the version you run. The result uses only the ranges stored on this record.

The check returns affected, not affected, or incomplete. It does not guess a version that is missing from the record.

  • cpe dlink/dir-822 firmwareversion unspecified
  • cpe dlink/dir-823 firmware1.00b06
  • cpe dlink/dir-859 firmware1.06b01
  • cpe dlink/dir-865l firmwareversion unspecified
  • cpe dlink/dir-868l firmwareversion unspecified
  • cpe dlink/dir-869 firmwareversion unspecified
  • cpe dlink/dir-880l firmwareversion unspecified
  • cpe dlink/dir-890l firmwareversion unspecified
  • vendor D-Link DIR-859 Routerversion unspecified

How to fix CVE-2019-17621

What to do

Three questions, each answered from this record only. Confirm the vendor advisory before you patch.

Should you patch?

CVE-2019-17621 is in the CISA known-exploited catalog, due Jul 20, 2023. Confirm D-Link DIR-859 Router against the vendor advisory and apply that fix. The CVSS score does not change the priority.

Which versions are affected?

Compare what you have installed with dlink/dir-823 firmware 1.00b06; dlink/dir-859 firmware 1.06b01. Apply updates per vendor instructions or discontinue use of the product if updates are unavailable.

What should an analyst verify?

CWE-78: OS Command Injection. EPSS 89.62%. The CISA KEV listing is the exploitation evidence. A public exploit reference is linked in Sources. That is not the same as confirmed exploitation. Use the source links for the original advisory.

Code

The project this record applies to. Exploit listings stay in References.

No public source repository is identified for this product.

Timeline

Detection, updates, and resolution for this record.

  1. Dec 30, 2019 · Catalog

    Detected

    D-Link DIR-859 router contains a command execution vulnerability in the UPnP endpoint URL, /gena.cgi. Exploitation allows an unauthenticated remote attacker to execute system commands as root by sending a specially crafted HTTP SUBSCRIBE request to the UPnP service when connecting to the local network.

  2. Jun 29, 2023 · CISA KEV

    Known exploited

    Apply updates per vendor instructions or discontinue use of the product if updates are unavailable.

  3. Jul 20, 2023 · CISA KEV

    Remediation due

    Apply updates per vendor instructions or discontinue use of the product if updates are unavailable.

  4. Jun 16, 2026 · Catalog

    Updated

    D-Link DIR-859 router contains a command execution vulnerability in the UPnP endpoint URL, /gena.cgi. Exploitation allows an unauthenticated remote attacker to execute system commands as root by sending a specially crafted HTTP SUBSCRIBE request to the UPnP service when connecting to the local network.

Sources

  • CISA KEVConfirmed exploitationCVE-2019-17621

    D-Link DIR-859 router contains a command execution vulnerability in the UPnP endpoint URL, /gena.cgi. Exploitation allows an unauthenticated remote attacker to execute system commands as root by sending a specially crafted HTTP SUBSCRIBE request to the UPnP service when connecting to the local network.

    cisa.gov
  • CVE.orgVulnerability recordCVE-2019-17621

    Official CVE identifier

    cve.org
  • FIRST EPSSExploitation probabilityCVE-2019-17621

    30-day exploitation probability 89.6%

    first.org
  • Metasploit ModulesPublic exploit moduleexploit_linux/upnp/dlink_dir859_subscribe_exec

    Public module reference (excellent). Module source is not copied into this catalog.

    rapid7.com
  • NIST NVDVulnerability recordCVE-2019-17621

    The UPnP endpoint URL /gena.cgi in the D-Link DIR-859 Wi-Fi router 1.05 and 1.06B01 Beta01 allows an Unauthenticated remote attacker to execute system commands as root, by sending a specially crafted HTTP SUBSCRIBE request to the UPnP service when connecting to the local network.

    nvd.nist.gov
  • Packet Storm SecurityCited referencehttp://packetstormsecurity.com/files/156054/D-Link-DIR-859-Unauthenticated-Remote-Command-Execution.html

    Packet Storm link already published on the finding.

    packetstormsecurity.com
  • VulnCheck KEVConfirmed exploitationCVE-2019-17621

    D-Link DIR-859 router contains a command execution vulnerability in the UPnP endpoint URL, /gena.cgi. Exploitation allows an unauthenticated remote attacker to execute system commands as root by sending a specially crafted HTTP SUBSCRIBE request to the UPnP service when connectin

    vulncheck.com

References

Freshness

Last verified in this catalog Oct 17, 2026. Significant claims (KEV, EPSS, CVSS, affected ranges) come from the source rows above — open the original publisher for the authoritative advisory.