Incorrect authorization in LoadMaster - CVE-2026-59689
Published: July 27, 2026 / Updated: July 29, 2026
Vulnerability identifier: #VU139983
CSH Severity: Medium
CVSS v4: 8.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-59689
CWE-ID: CWE-863
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote user to escalate privileges to root.
The vulnerability exists due to incorrect authorization in the appliance authorization mechanism when processing authenticated operations. A remote user can perform crafted actions to escalate privileges to root.
Affected software
LoadMaster
MOVEit WAF
MOVEit WAF
How to mitigate CVE-2026-59689
Install security update from vendor's website.
LoadMaster - addressed in versions 7.2.54.19, 7.2.63.3
MOVEit WAF - update to 7.2.63.3
MOVEit WAF - update to 7.2.63.3