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Back to active CVEs
High · CVSS 8.3CVE-2026-105821

Broken Access Control Leading to Cross-Device Token Issuance in Tapo Cloud MQTT ProxyCVE-2026-105821

Answer in brief

CVE-2026-105821 records a High severity (CVSS 8.3) vulnerability in Broken Access Control Leading to Cross-Device Token Issuance in Tapo Cloud MQTT Proxy. The current sources do not mark it as known exploited. The current feed maps TP-Link Systems Inc./Tapo Cloud Service (generic). Check affected ranges and fixed versions before updating.

Analysis pending evidence review

HOL Guard separates source facts from reviewed analysis. See the methodology.

Published Nov 3, 2026Updated Nov 3, 2026Source checked Nov 3, 2026First seen by HOL Nov 3, 2026Material review Nov 3, 2026
Upstream Advisory

Key facts

Risk
High · CVSS 8.3
Exploitation
Not marked as known exploited
Affected software
1 mapped package or product
Fix availability
Available

Why this deserves its current priority

CVSS is 8.3. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.

Analysis status

Analysis pending evidence review

Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.

Affected scope and exposure questions

The current feed maps TP-Link Systems Inc./Tapo Cloud Service (generic). Check affected ranges and fixed versions before updating.

Mapped affected packages and fixed versions
PackageAffected rangeFixed version
TP-Link Systems Inc./Tapo Cloud Servicegeneric>=0 <N/AN/A

Recommended response

  1. 1Check inventory. Check lockfiles and deployed manifests for TP-Link Systems Inc./Tapo Cloud Service.
  2. 2Review the reported fix. Update TP-Link Systems Inc./Tapo Cloud Service to N/A if you use the affected versions. Test the change in a non-production environment first.

Evidence timeline and material changes

  1. Published upstream

    Nov 3, 2026

    Evidence: source:cvelist:source_dates:source-dates:record

  2. Source modified

    Nov 3, 2026

    Evidence: source:cvelist:source_dates:source-dates:record

  3. First seen by HOL

    Nov 3, 2026

Sources and claim methodology

  • Source referencetp-link.com
Upstream source description

The Tapo Cloud MQTT broker contains a broken access control vulnerability in a proxy topic used by authenticated Tapo devices to request service tokens. The broker does not verify that the device ID supplied in a proxy request belongs to the authenticated device. An attacker who owns a Tapo device and knows another device's ID may obtain a device token scoped to the target device and use it to upload attacker-controlled content to the target user's Tapo Cloud storage. The content may then be presented in the Tapo app as a legitimate event. Successful exploitation may allow an attacker to upload attacker-controlled content that is presented to a target user as a legitimate Tapo event, retrieve internal service information through crafted proxy requests, or abuse Tapo Cloud outbound request capability in activity that could affect service availability.

Quoted source text, attributed separately from HOL analysis.

Record context

Vulnerability class
Missing Auth
EPSS
Not reported
CWE IDs
CWE-862
Source
CVE List V5
Source checked
Nov 3, 2026
References
1 linked source
Open source record