CVE-2026-4048 Command injection in ECS Connections Manager
Authenticated attackers with high privileges can execute arbitrary OS commands via unsanitized input in custom WAF rule files on Progress ADC products.
- Exploited in the wild
- Not known
- Login needed
- An administrator
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-4048?
CVE-2026-4048 is a high-severity command injection vulnerability in Progress Software ECS Connections Manager, published on 20 Apr 2026. It can only be exploited from the same machine or local network, with no action from the victim.
Official 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.
Weakness: CWE-77
Which versions are affected by CVE-2026-4048?
It affects 3 products.
Products include Progress Connection Manager for Objectscale, Progress Ecs Connection Manager, Progress Loadmaster.
How do I fix CVE-2026-4048?
No fix has been published for CVE-2026-4048 yet. Limit exposure of the affected software until one is available.
Upgrade, and pass arguments to programs as a list instead of through a shell. More about Command injection.
Is CVE-2026-4048 being exploited?
There is no known exploitation of CVE-2026-4048 in the wild and no public exploit code.
Other vulnerabilities in Progress Software ECS Connections Manager
Sources
Also known as GHSA-pwx9-99jm-fx95.