NetScaler Gateway - RCE (CVE-2023-3519)

CVE-2023-3519 is a critical vulnerability that allows unauthenticated remote code execution.

CrowdSec has been tracking this vulnerability and its exploits since 15th of December 2023.

Data from the CrowdSec community indicates that exploitation of CVE-2023-3519 is highly selective and intelligence-driven. Threat actors use advanced reconnaissance and carefully choose their targets, often as part of sophisticated campaigns or advanced persistent threat operations. Telemetry from the CrowdSec network also shows that exploitation activity for CVE-2023-3519 remains steady week-over-week. Attack volumes are consistent with long-term trends, indicating sustained interest from threat actors. CVE-2023-3519 continues to be an active part of the threat landscape and will likely remain this way for the forseeable future.

Exploitation attempts are concentrated on URLs containing /saml/login.