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CVE-2025-54756— BrightSign Players Use of Default Credentials

Quick assessment

Affected
BrightSign BrightSign OS series 4 players
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

BrightSign OS是美国BrightSign公司的一个硬件播放器专用操作系统。 BrightSign OS series 4 v8.5.53.1之前版本和series 5 v9.0.166之前版本存在安全漏洞，该漏洞源于使用可猜测的默认密码，可能导致攻击者获取设备访问权限。

CVSS 8.4 · High EPSS 0.15% · P3

Possible ATT&CK Techniques 1 AI

T1078.003 · Local Accounts
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I. Basic Information for CVE-2025-54756

Vulnerability Information
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Vulnerability Title
BrightSign Players Use of Default Credentials
Source: CVE Program / CVE List V5
Vulnerability Description
BrightSign players running BrightSign OS series 4 prior to v8.5.53.1 or series 5 prior to v9.0.166 use a default password that is guessable with knowledge of the device information. The latest release fixes this issue for new installations; users of old installations are encouraged to change all default passwords.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
CWE-1392
Source: CVE Program / CVE List V5
Vulnerability Title
BrightSign OS 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
BrightSign OS是美国BrightSign公司的一个硬件播放器专用操作系统。 BrightSign OS series 4 v8.5.53.1之前版本和series 5 v9.0.166之前版本存在安全漏洞，该漏洞源于使用可猜测的默认密码，可能导致攻击者获取设备访问权限。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
BrightSign BrightSign OS series 4 players 0 ~ v8.5.53.1 -
BrightSign BrightSign OS series 5 players 0 ~ v9.0.166 -

II. Public POCs for CVE-2025-54756

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III. Intelligence Information for CVE-2025-54756

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IV. Related Vulnerabilities

Same product: BrightSign OS series 4 players
Same vendor: BrightSign
Same weakness: CWE-1392

V. Comments for CVE-2025-54756

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