CVE-2026-4048 PUBLISHED

OS Command Injection Remote Code Execution Vulnerability in Progress LoadMaster, ECS Connection Manager, Object Scale Connection Manager & MOVEit WAF

Assigner: ProgressSoftware
Reserved: 12.03.2026 Published: 20.04.2026 Updated: 20.04.2026

OS Command Injection Remote Code Execution Vulnerability in UI in Progress ADC Products allows an authenticated attacker with “All” permissions to execute arbitrary commands on the LoadMaster appliance by exploiting unsanitized input in a custom WAF rule file during the file upload process.

Metrics

CVSS 3.1

CVSS Vector: CVSS:3.1/AV:A/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H
CVSS Score: 8.4

Attack Vector	Adjacent Network	Scope	Changed
Attack Complexity	Low	Confidentiality Impact	High
Privileges Required	High	Integrity Impact	High
User Interaction	None	Availability Impact	High

CVSS 3.1

Product Status

Vendor	Progress Software
Product	LoadMaster
Versions	Default: unaffected affected from V7.1.20.0 to V7.2.63.0 (excl.)

Vendor	Progress Software
Product	ECS Connections Manager
Versions	Default: unaffected affected from V7.2.49.0 to V7.2.63.0 (excl.)

Vendor	Progress Software
Product	Object Scale Connection Manager
Versions	Default: unaffected affected from V7.2.62.0 to V7.2.63.0 (excl.)

Vendor	Progress Software
Product	MOVEit WAF
Versions	Default: unaffected affected from V7.2.62.0 to V7.2.63.0 (excl.)

References

https://community.progress.com/s/article/LoadMaster-Security-Vulnerabilites-CVE-2026-3517-CVE-2026-3518-CVE-2026-3519-CVE-2026-4048-CVE-2026-21876

Problem Types

CWE-77 CWE

Impacts

CAPEC-88