Citrix has issued security updates for NetScaler ADC to fix a critical memory overflow vulnerability, CVE-2025-6543, which has been exploited in the wild. The flaw impacts multiple versions and configurations, requiring urgent upgrades to prevent potential control flow issues and denial-of-service attacks. #CVE2025-6543 #NetScalerADC #Citrix
Keypoints
- Citrix released patches to address a critical vulnerability in NetScaler ADC and Gateway systems.
- The flaw, CVE-2025-6543, involves a memory overflow that can lead to denial-of-service or control flow issues.
- Successful exploitation requires specific configurations such as VPN or AAA virtual servers.
- Multiple versions of NetScaler ADC and Gateway are affected, including end-of-life editions.
- Exploits of the vulnerability have been observed on unpatched appliances in real-world scenarios.
Read More: https://thehackernews.com/2025/06/citrix-releases-emergency-patches-for.html