Yarbo up to 2.3.9 MQTT Broker missing authentication

CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
Our Cyber Threat Intelligence team is monitoring different web sites, mailing lists, exploit markets and social media networks. The CTI Interest Score identifies the interest of attackers and the security community for this specific vulnerability in real-time. A high score indicates an elevated risk to be targeted for this vulnerability.
7.9$0-$5k0.00

Summaryinfo

A vulnerability classified as critical has been found in Yarbo up to 2.3.9. This affects an unknown part of the component MQTT Broker. The manipulation leads to missing authentication. This vulnerability is listed as CVE-2026-7415. The attack must be carried out from within the local network. There is no available exploit.

Detailsinfo

A vulnerability was found in Yarbo up to 2.3.9 and classified as critical. This issue affects some unknown processing of the component MQTT Broker. The manipulation with an unknown input leads to a missing authentication vulnerability. Using CWE to declare the problem leads to CWE-306. The product does not perform any authentication for functionality that requires a provable user identity or consumes a significant amount of resources. Impacted is confidentiality, integrity, and availability. The summary by CVE is:

The MQTT broker embedded in Yarbo firmware v2.3.9 is configured to allow anonymous connections with no topic-level read or write ACLs. Any host on the same network can subscribe to sensitive telemetry topics or publish control messages directly to the robot without authentication or authorization of any kind.

The weakness was presented by Andreas Makris. The advisory is shared at github.com. The identification of this vulnerability is CVE-2026-7415 since 04/29/2026. The exploitation is known to be easy. Access to the local network is required for this attack to succeed. No form of authentication is needed for a successful exploitation. Neither technical details nor an exploit are publicly available. The price for an exploit might be around USD $0-$5k at the moment (estimation calculated on 05/07/2026).

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

Productinfo

Name

Version

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 8.0
VulDB Meta Temp Score: 7.9

VulDB Base Score: 6.3
VulDB Temp Score: 6.1
VulDB Vector: 🔒
VulDB Reliability: 🔍

CNA Base Score: 9.8
CNA Vector (AHA): 🔒

CVSSv2info

AVACAuCIA
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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfo

Class: Missing authentication
CWE: CWE-306 / CWE-287
CAPEC: 🔒
ATT&CK: 🔒

Physical: No
Local: No
Remote: Yes

Availability: 🔒
Status: Not defined

EPSS Score: 🔒
EPSS Percentile: 🔒

Price Prediction: 🔍
Current Price Estimation: 🔒

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Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: no mitigation known
Status: 🔍

0-Day Time: 🔒

Timelineinfo

04/29/2026 CVE reserved
05/07/2026 +8 days Advisory disclosed
05/07/2026 +0 days VulDB entry created
05/07/2026 +0 days VulDB entry last update

Sourcesinfo

Advisory: github.com
Researcher: Andreas Makris
Status: Not defined

CVE: CVE-2026-7415 (🔒)
GCVE (CVE): GCVE-0-2026-7415
GCVE (VulDB): GCVE-100-361913

Entryinfo

Created: 05/07/2026 19:06
Changes: 05/07/2026 19:06 (62)
Complete: 🔍
Cache ID: 216::103

Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

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