CVE-2024-12903

Local privilege escalation via Everyone-writable service files

Published Dec 23, 2024 · Updated Dec 24, 2024

Incorrect default permissions in Biamp Evoko Home Service 2.4.2 through 2.7.4 allow local users to execute code with elevated privileges. The Windows installation grants the Everyone group full control over Evoko Home files and folders, allowing unprivileged modification of service content. Any non-admin user with local OS access can use the writable content to escalate privileges and establish persistence.

CVSS severity7.8
High
EPSS probability0.20%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
Coverage for this vulnerability

See if you're affected

Explore vulnerability checks for your environment with Hinoki.

Book a demo

Summary

What happened

Incorrect default permissions in Biamp Evoko Home Service 2.4.2 through 2.7.4 allow local users to execute code with elevated privileges. The Windows installation grants the Everyone group full control over Evoko Home files and folders, allowing unprivileged modification of service content. Any non-admin user with local OS access can use the writable content to escalate privileges and establish persistence.

The record

CVE
CVE-2024-12903
Published
Dec 23, 2024
Updated
Dec 24, 2024
Vendor
Biamp
Product
Evoko Home
Classifications
CWE-276, T1574.010
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Dec 23, 2024CVE publishedPublication date reported by the CVE source.
  2. Dec 24, 2024Record 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?

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

  1. Affected versionversion=2.4.2 <=2.7.4.

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

Biamp · Evoko Homeversion=2.4.2 <=2.7.4.

Published CVSS scores

7.8INCIBECVSS:3.1/AV:L/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)
Vectorlocal
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-276Incorrect Default Permissions
T1574.010Services File Permissions Weakness

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

See the directory against your own environment.

Your stack

Check the software in your environment

Book a demo to see how Hinoki identifies affected software and validates exploitability in your environment.

Book a demo