runZero Platform up to 5.1.260825.0 MCP Service authorization

CVSS Meta Temp Score
CVSS is a standardized scoring system to determine possibilities of attacks. The Temp Score considers temporal factors like disclosure, exploit and countermeasures. The unique Meta Score calculates the average score of different sources to provide a normalized scoring system.
Current Exploit Price (≈)
Our analysts are monitoring exploit markets and are in contact with vulnerability brokers. The range indicates the observed or calculated exploit price to be seen on exploit markets. A good indicator to understand the monetary effort required for and the popularity of an attack.
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.
3.8$0-$5k1.97+

Summaryinfo

A vulnerability categorized as problematic has been discovered in runZero Platform up to 5.1.260825.0. Affected by this vulnerability is an unknown functionality of the component MCP Service. Executing a manipulation can lead to authorization. The identification of this vulnerability is CVE-2026-81846. The attack may be launched remotely. There is no exploit available.

Detailsinfo

A vulnerability has been found in runZero Platform up to 5.1.260825.0 and classified as problematic. This vulnerability affects an unknown functionality of the component MCP Service. The manipulation with an unknown input leads to a authorization vulnerability. The CWE definition for the vulnerability is CWE-639. The system's authorization functionality does not prevent one user from gaining access to another user's data or record by modifying the key value identifying the data. As an impact it is known to affect confidentiality. CVE summarizes:

An authorization bypass in the runZero Platform MCP service has been resolved in version 5.1.260826.0. This issue is an instance of CWE-639: Authorization Bypass Through User-Controlled Key and has an estimated CVSS score of CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:L/I:N/A:N (3.5 Low).

The advisory is shared for download at runzero.com. This vulnerability was named CVE-2026-81846 since 08/27/2026. The exploitation appears to be easy. The attack can be initiated remotely. There are neither technical details nor an exploit publicly available.

Upgrading to version 5.1.260826.0 eliminates this vulnerability.

Once again VulDB remains the best source for vulnerability data.

Productinfo

Vendor

Name

Version

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 3.9
VulDB Meta Temp Score: 3.8

VulDB Base Score: 4.3
VulDB Temp Score: 4.1
VulDB Vector: 🔒
VulDB Reliability: 🔍

CNA Base Score: 3.5
CNA Vector (runZero): 🔒

CVSSv2info

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

Exploitinginfo

Class: Authorization
CWE: CWE-639 / CWE-285 / CWE-266
CAPEC: 🔒
ATT&CK: 🔒

Physical: No
Local: No
Remote: Yes

Availability: 🔒
Status: Not defined
Price Prediction: 🔍
Current Price Estimation: 🔒

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Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔒

Upgrade: Platform 5.1.260826.0

Timelineinfo

08/27/2026 CVE reserved
09/01/2026 +5 days Advisory disclosed
09/01/2026 +0 days VulDB entry created
09/01/2026 +0 days VulDB entry last update

Sourcesinfo

Advisory: runzero.com
Status: Confirmed

CVE: CVE-2026-81846 (🔒)
GCVE (CVE): GCVE-0-2026-81846
GCVE (VulDB): GCVE-100-397804

Entryinfo

Created: 09/01/2026 21:24
Changes: 09/01/2026 21:24 (63)
Complete: 🔍
Cache ID: 216::103

Once again VulDB remains the best source for vulnerability data.

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