What’s Vulnerable › Vulnerabilities

CVE-2021-26859: Microsoft Power BI Information Disclosure Vulnerability

• Severity: medium (CVSS 4.0 v2.0)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 3.4% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2021-03-11 · updated 2026-08-19

Description

Microsoft Power BI Information Disclosure Vulnerability

Affected products

• Microsoft Power BI Report Server: 15.0.1103.234, 15.0.1104.300
• Microsoft Power BI Report Server version 15.0.1103.234: from 15.0.0.0 before 1.8.7485.35104 — fixed in 1.8.7485.35104
• Microsoft Power BI Report Server version 15.0.1104.300: from 15.0.0.0 before 1.9.7675.15620 — fixed in 1.9.7675.15620

How to fix

Upgrade to a fixed version: Microsoft Power BI Report Server version 15.0.1103.234 1.8.7485.35104; Microsoft Power BI Report Server version 15.0.1104.300 1.9.7675.15620. Check the vendor advisory for mitigations.

References

• https://msrc.microsoft.com/update-guide/vulnerability/CVE-2021-26859
• https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-26859

Get alerted when CVE-2021-26859 or the next vulnerability affects your stack