CVE-2025-46386Network attack vector

Authenticated cross-user access via user-controlled key

Published Aug 6, 2025 · Updated Aug 6, 2025

Authorization bypass in Emby Server 4.9.0.35 allows remote authenticated users to access another user's resources via a user-controlled key. The CNA identifies CWE-639 but does not publish the affected endpoint, object type, parameter, or authorization check that trusts the supplied key. A low-privileged account and network access are required, but the record does not disclose which cross-user resource or operation becomes accessible.

CVSS severity8.8
High
EPSS probability0.32%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Authorization bypass in Emby Server 4.9.0.35 allows remote authenticated users to access another user's resources via a user-controlled key. The CNA identifies CWE-639 but does not publish the affected endpoint, object type, parameter, or authorization check that trusts the supplied key. A low-privileged account and network access are required, but the record does not disclose which cross-user resource or operation becomes accessible.

The record

CVE
CVE-2025-46386
Published
Aug 6, 2025
Updated
Aug 6, 2025
Vendor
Media Browser
Product
Emby Server
Classifications
CWE-639
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Aug 6, 2025CVE publishedPublication date reported by the CVE source.
  2. Aug 6, 2025Record 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=4.9.0.35

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Media Browser · Emby Serverversion=4.9.0.35

Published CVSS scores

8.8Israel National Cyber DirectorateCVSS: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-639Authorization Bypass Through User-Controlled Key

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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