CVE-2026-65811Network attack vector

Authenticated remote code execution

Published Aug 11, 2026 · Updated Aug 25, 2026

Improper input validation in Power BI Report Server before 15.0.1121.120 allows remote authenticated users to execute code over a network. Microsoft's public records do not identify the affected endpoint, parser, or validation routine; they disclose only that crafted network input reaches server-side code execution. Exploitation requires valid low-privilege credentials and no user interaction, which makes reachable PBIRS deployments an authenticated server-side RCE triage item.

CVSS severity8.8
High
EPSS probability0.53%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Improper input validation in Power BI Report Server before 15.0.1121.120 allows remote authenticated users to execute code over a network. Microsoft's public records do not identify the affected endpoint, parser, or validation routine; they disclose only that crafted network input reaches server-side code execution. Exploitation requires valid low-privilege credentials and no user interaction, which makes reachable PBIRS deployments an authenticated server-side RCE triage item.

The record

CVE
CVE-2026-65811
Published
Aug 11, 2026
Updated
Aug 25, 2026
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-20, T1190
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Aug 11, 2026CVE publishedPublication date reported by the CVE source.
  2. Aug 25, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

Affected buildAffected product and version details are unavailable.

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

8.8Microsoft CorporationCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-20Improper Input Validation
T1190Exploit Public-Facing Application

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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