Broken Access Control Leading to Cross-Device Token Issuance in Tapo Cloud MQTT Proxy
CVSS score
8.3
EPSS probability
—
Risk score
0.8
Published
5 h ago
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Vulnerability description
DayBreach AI Explanation
Verified against sourcesSources read
1
Source agreement
Tam uyum
Evidence confidence
%53
Short explanation
CVE-2026-105821 involves a broken access control vulnerability in the Tapo Cloud MQTT broker proxy topic. An authenticated attacker knowing another device ID can obtain a targeted service token and upload content to the cloud storage.
This flaw allows attackers to present attacker-controlled content to target users as legitimate Tapo events and potentially impact service availability.
What should be done?
- Follow official vendor advisories and support guidance.
- Apply any available device and cloud service updates.
- Monitor MQTT proxy traffic and authorization controls.
The sources give limited detail on some technical conditions. Review the chain of evidence below before deciding how to act.
Chain of evidence and sources
Tapo Cloud MQTT broker bileşenindeki yetkisiz erişim kontrolü, saldırganların başka bir cihaza ait servis token'ı elde etmesine izin verir.
Yama durumu için incelenen resmî kaynaklarda kesin bir bilgi doğrulanamamıştır.
Show the technical text from the sources
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.
CVSS vector: CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:H/VA:H/SC:N/SI:N/SA:N
CWE: CWE-862
This explanation was compiled automatically from the source records. Scores, active exploitation, patch and exploit status come straight from the sources.
IMPACT: Affected Products and Software
Affected Products
The following products are affected by CVE-2026-105821 vulnerability. Where our threat engine knows the exact affected versions, they are listed below.
| ID | VENDOR | PRODUCT | ACTION |
|---|---|---|---|
| 1 | TP-Link Systems Inc. | Tapo Cloud Service | View |
RED HAT CSAF/VEX: Product Impact Check
SCORING: CVSS from Multiple Sources
CVSS Scores
The Common Vulnerability Scoring System is a standardised framework for assessing the severity of vulnerabilities in software and systems. We collect and display CVSS scores from several sources for each CVE.
| SCORE | VERSION | SEVERITY | VECTOR | SOURCE |
|---|---|---|---|---|
| 8.3 | CVSS V4_0 | HIGH | CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:H/VA:H/SC:N/SI:N/SA:N | CVE CNA |
| 8.3 | CVSS V40 | HIGH | CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X | NVD |
Patch and Remediation Guide
Solution & Remediation Advisory
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Public exploit and active exploitation status
Verified exploit intelligence
No verified public PoC, exploit repository or Metasploit module has been found for this CVE yet.
Weakness Classification and Attack Patterns (CWE & CAPEC)
CWE - Common Weakness Enumeration
While CVE identifies specific instances of vulnerabilities, CWE categorises the common flaws or weaknesses that can lead to vulnerabilities. CVE-2026-105821 is associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification (CAPEC) stores attack patterns, which are descriptions of the common attributes and approaches employed by adversaries to exploit the CVE-2026-105821 weaknesses.
Attack Vector and Accessibility
Official Sources and Advisories
CVSS Vector Radar Chart
8.3 / 10Vulnerability Scoring Details
CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:H/VA:H/SC:N/SI:N/SA:NYama durumu bilinmiyor
Weakness Type (CWE & CAPEC)
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