Citrix has released a critical security bulletin addressing a vulnerability affecting NetScaler ADC (formerly Citrix ADC) and NetScaler Gateway (formerly Citrix Gateway). Citrix NetScaler is an all-in-one load balancer, web application firewall (WAF), virtual private network (VPN) gateway and SSL offloading tool for web applications.
- CVE-2025-6543 is a ‘memory overflow’ vulnerability with a CVSSv4 base score of 9.2. Successful exploitation could allow a remote unauthenticated attacker to gain unintended control flow and perform denial-of-service (DoS) in NetScaler ADC and NetScaler Gateway. NetScaler is only vulnerable to CVE-2025-6543 when configured as Gateway (VPN virtual server, ICA Proxy, CVPN, RDP Proxy) OR AAA virtual server.
Read more…
Source: NHS Digital
Sign up for our Newsletter
The latest news and insights delivered right to your inbox.
Related:
- Autonomous robots used in hundreds of hospitals at risk of remote hijacks
April 12, 2022
A decade ago security researcher Barnaby Jack famously wirelessly hacked a hospital insulin pump live on stage in front of hundreds of people to demonstrate how easily it could be compromised to deliver a lethal dose of medication. In the years that have passed, medical device security has gotten better, albeit with an occasional high-profile ...
- CVE-2022-22965: Analyzing the Exploitation of Spring4Shell Vulnerability in Weaponizing and Executing the Mirai Botnet Malware
April 11, 2022
Trend Micro Threat Research observed active exploitation of the Spring4Shell vulnerability assigned as CVE-2022-22965, which allows malicious actors to weaponize and execute the Mirai botnet malware. The exploitation allows threat actors to download the Mirai sample to the “/tmp” folder and execute them after permission change using “chmod”. Researchers began seeing malicious activities at the start ...
- Palo Alto Networks firewalls, VPNs vulnerable to OpenSSL bug
April 6, 2022
American cybersecurity company Palo Alto Networks warned customers on Wednesday that some of its firewall, VPN, and XDR products are vulnerable to a high severity OpenSSL infinite loop bug disclosed three weeks ago. Threat actors can exploit this security vulnerability (tracked as CVE-2022-0778) to trigger a denial of service state and remotely crash devices running unpatched ...
- MacOS SUHelper Root Privilege Escalation Vulnerability: A Deep Dive Into CVE-2022-22639
April 4, 2022
Trend Micro researchers discovered a vulnerability in suhelperd, a helper daemon process for Software Update in macOS. A class inside suhelperd, SUHelper, provides an essential system service through the inter-process communication (IPC) mechanism. The process runs as root and is signed with special entitlements, such as com.apple.rootless.install, which grants the process permission to bypass System ...
- An In-Depth Look at ICS Vulnerabilities Part 2
April 4, 2022
In part one, Trend Micro researchers discussed ICS-CERT advisories from 2010 to 2021. Using MITRE Adversarial Tactics, Techniques, and Common Knowledge (ATT&CK) for ICS, determined the number of identified CVEs that affect the ICS environment. For this blog entry, Trend Micro look into the sectors affected, especially during 2021: Read more… Source: Trend Micro Related story: An In-Depth Look ...
- SpringShell RCE vulnerability: Guidance for protecting against and detecting CVE-2022-22965
April 4, 2022
On March 31, 2022, vulnerabilities in the Spring Framework for Java were publicly disclosed. Microsoft is currently assessing the impact associated with these vulnerabilities. This blog is for customers looking for protection against exploitation and ways to detect vulnerable installations on their network of the critical remote code execution (RCE) vulnerability CVE-2022-22965 (also known as ...