PatchSiren

PatchSiren cyber security CVE debrief

CVE-2026-21229 Microsoft CVE debrief

AI-assisted PatchSiren debrief based on the supplied source corpus. The CVE record was published on 2026-02-10T18:16:23.453Z and has not been modified since then. The vulnerability exists due to improper input validation in Power BI Report Server, allowing an authorized attacker to execute code over a network. The CVSS score is 8, indicating high severity. Affected product context suggests that Power BI Report Server users are impacted. Defensive impact includes prioritizing patching to prevent potential code execution. Organizations using Power BI Report Server should be aware of this vulnerability and take steps to mitigate it. This includes reviewing vendor guidance, assessing affected scope, and prioritizing patching. Vulnerability management and security teams should monitor for potential exploitation and review compensating controls for exposed systems.

Vendor
Microsoft
Product
Power BI Report Server
CVSS
HIGH 8
CISA KEV
Not listed in stored evidence
Original CVE published
2026-02-10
Original CVE updated
2026-08-19
Advisory published
2026-02-10
Advisory updated
2026-08-19

Who should care

Organizations using Power BI Report Server, particularly those with exposed deployments, should be aware of this vulnerability and take steps to mitigate it. This includes reviewing vendor guidance, assessing affected scope, and prioritizing patching. Vulnerability management and security teams should monitor for potential exploitation and review compensating controls for exposed systems.

Technical summary

The vulnerability exists due to improper input validation in Power BI Report Server, allowing an authorized attacker to execute code over a network. The CVSS score is 8, indicating high severity. Affected product context suggests that Power BI Report Server users are impacted. Defensive impact includes prioritizing patching to prevent potential code execution.

Defensive priority

Organizations using Power BI Report Server should prioritize patching to prevent potential code execution.

Recommended defensive actions

  • Apply patches or updates provided by Microsoft to address the vulnerability
  • Restrict access to Power BI Report Server to only trusted users
  • Monitor Power BI Report Server for suspicious activity

Evidence notes

The CVE record indicates improper input validation in Power BI Report Server, allowing an authorized attacker to execute code over a network. The CVSS score is 8, indicating high severity. Evidence is limited to the CVE record and NVD detail. Defenders should verify affected Power BI Report Server deployments and review vendor guidance for patching.

Sources and references

Verified primary and authoritative sources

  • CVE-2026-21229 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2026-21229

    CVE Program - Official CVE Program record with source-provided CVE metadata.

  • CVE-2026-21229 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2026-21229

    NIST National Vulnerability Database - Official NIST NVD detail page and source-specific vulnerability assessment.

Supplemental references

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.