CVE-2026-21229: CWE-20: Improper Input Validation in Microsoft Power BI Report Server
Improper input validation in Power BI allows an authorized attacker to execute code over a network.
AI Analysis
Technical Summary
This vulnerability (CVE-2026-21229) in Microsoft Power BI Report Server 1.6.0 stems from improper input validation (CWE-20). It enables an attacker with authorized access to execute arbitrary code remotely, potentially compromising confidentiality, integrity, and availability of the system. The CVSS v3.1 base score is 8.0, reflecting high impact with network attack vector, low attack complexity, required privileges, and user interaction. Microsoft has published an official fix for this vulnerability, as detailed in their security advisory.
Potential Impact
Successful exploitation allows an authorized attacker to execute arbitrary code remotely on the affected Power BI Report Server, leading to complete compromise of confidentiality, integrity, and availability of the system. This can result in unauthorized data access, modification, or service disruption.
Mitigation Recommendations
An official fix is available from Microsoft. Users should apply the patch provided in the Microsoft security advisory at https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-21229 to remediate this vulnerability. No additional mitigation steps are indicated by the vendor.
CVE-2026-21229: CWE-20: Improper Input Validation in Microsoft Power BI Report Server
Description
Improper input validation in Power BI allows an authorized attacker to execute code over a network.
CVSS v3.1
Score 8.0high
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability (CVE-2026-21229) in Microsoft Power BI Report Server 1.6.0 stems from improper input validation (CWE-20). It enables an attacker with authorized access to execute arbitrary code remotely, potentially compromising confidentiality, integrity, and availability of the system. The CVSS v3.1 base score is 8.0, reflecting high impact with network attack vector, low attack complexity, required privileges, and user interaction. Microsoft has published an official fix for this vulnerability, as detailed in their security advisory.
Potential Impact
Successful exploitation allows an authorized attacker to execute arbitrary code remotely on the affected Power BI Report Server, leading to complete compromise of confidentiality, integrity, and availability of the system. This can result in unauthorized data access, modification, or service disruption.
Mitigation Recommendations
An official fix is available from Microsoft. Users should apply the patch provided in the Microsoft security advisory at https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-21229 to remediate this vulnerability. No additional mitigation steps are indicated by the vendor.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- microsoft
- Date Reserved
- 2025-12-11T21:02:05.734Z
- Cvss Version
- 3.1
- State
- PUBLISHED
- Remediation Level
- official-fix
- Vendor Advisory Urls
- [{"url":"https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-21229","vendor":"Microsoft"}]
Threat ID: 698b75fd4b57a58fa1209fa9
Added to database: 2/10/2026, 6:16:29 PM
Last enriched: 5/12/2026, 5:10:18 AM
Last updated: 6/10/2026, 4:08:08 AM
Views: 81
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