ASUS Business Manager Service Client-Side Authentication Local Privilege Escalation Vulnerability

July 15th, 2026
ZDI-26-431 ZDI-CAN-28776

CVE ID

CVE-2026-8921

CVSS Score

7.8 AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Affected Vendors

ASUS

Affected Products

Business Manager

Vulnerability Details

This vulnerability allows local attackers to escalate privileges on affected installations of ASUS Business Manager. An attacker must first obtain the ability to execute low-privileged code on the target system in order to exploit this vulnerability.

The specific flaw exists within the ASUS Business Manager Service. The issue results from the use of client-side authentication. An attacker can leverage this vulnerability to escalate privileges and execute arbitrary code in the context of SYSTEM.

Additional Details

ASUS has issued an update to correct this vulnerability. More details can be found at:
https://www.asus.com/security-advisory/

Disclosure Timeline

  • 2026-03-25 - Vulnerability reported to vendor
  • 2026-07-15 - Coordinated public release of advisory
  • 2026-07-15 - Advisory Updated

Credit

Gu YongZeng (@0x0dee)

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