CVE-2026-58647Network attack vector

Authenticated spoofing via undisclosed cross-site scripting

Published Jul 14, 2026 · Updated Jul 14, 2026

Cross-site scripting in Microsoft Power BI Report Server before 1.26.9682.1442 allows remote authenticated users to spoof content. Microsoft has not disclosed the affected input or rendering path, only that web-page generation fails to neutralize attacker-controlled input. Exploitation requires low-privileged access and user interaction; no more specific browser-content consequence has been published.

CVSS severity8.0
High
EPSS probability0.35%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Cross-site scripting in Microsoft Power BI Report Server before 1.26.9682.1442 allows remote authenticated users to spoof content. Microsoft has not disclosed the affected input or rendering path, only that web-page generation fails to neutralize attacker-controlled input. Exploitation requires low-privileged access and user interaction; no more specific browser-content consequence has been published.

The record

CVE
CVE-2026-58647
Published
Jul 14, 2026
Updated
Jul 14, 2026
Vendor
Microsoft
Product
Power BI Report Server
Classifications
CWE-79, CAPEC-588, CAPEC-591, CAPEC-63, CAPEC-592, CAPEC-85, CAPEC-209
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Jul 14, 2026CVE publishedPublication date reported by the CVE source.
  2. Jul 14, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=1.6.0 <15.0.1121.120

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Microsoft · Power BI Report Serverversion=1.6.0 <15.0.1121.120

Published CVSS scores

5.4NIST NVDCVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N
8.0Microsoft CorporationCVSS:3.1/AV:N/AC:L/PR:L/UI:R/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-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
CAPEC-588DOM-Based XSS
CAPEC-591Reflected XSS
CAPEC-63Cross-Site Scripting (XSS)
CAPEC-592Stored XSS
CAPEC-85AJAX Footprinting
CAPEC-209XSS Using MIME Type Mismatch

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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