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:
- Cyber Security Association of China calls for cybersecurity review of Intel products sold in China
October 16, 2024
The Cyber Security Association of China on Wednesday called for the launch of a systematic review of potential cybersecurity risks in Intel products due to frequent vulnerabilities and high failure rates, in order to effectively safeguard China’s national security and the legitimate rights and interests of Chinese consumers. The association cited four reasons for the review: ...
- Tor Browser and Firefox users should update to fix actively exploited vulnerability
October 16, 2024
Mozilla has announced a security fix for its Firefox browser which also impacts the closely related Tor Browser. The new version fixes one critical security vulnerability which is reportedly under active exploitation. To address the flaw, both Mozilla and Tor recommend that users update their browsers to the most current versions available. Firefox users that have ...
- How Low Can You Go? An Analysis of 2023 Time-to-Exploit Trends
October 15, 2024
Mandiant analyzed 138 vulnerabilities that were disclosed in 2023 and that we tracked as exploited in the wild. Consistent with past analyses, the majority (97) of these vulnerabilities were exploited as zero-days (vulnerabilities exploited before patches are made available, excluding end-of-life technologies). Forty-one vulnerabilities were exploited as n-days (vulnerabilities first exploited after patches are available). While ...
- Fake attachment. Roundcube mail server attacks exploit CVE-2024-37383 vulnerability.
October 15, 2024
In September 2024, threat intelligence experts from the Positive Technologies Security Expert Center (PT ESC) discovered an email sent to a governmental organization belonging to a CIS country. Timestamps indicate that the email was sent back in June 2024. The email appeared to be a message without text, containing only an attached document. However, the email ...
- Critical Veeam Backup & Replication Vulnerability Under Active Exploitation
October 11, 2024
Security researchers have reported CVE-2024-40711 is under active exploitation by ransomware groups. These groups are reportedly exploiting CVE-2024-40711 as a second stage exploit to create new local Administrator accounts to facilitate further objectives on compromised networks. Reports warn of exploitation attempts since shortly after official disclosure by Veeam. Enterprise backup and disaster recovery applications are valuable ...
- Burning Zero Days: Suspected Nation-State Adversary Targets Ivanti CSA
October 11, 2024
Today FortiGuard Labs is releasing this blog post about a case where an advanced adversary was observed exploiting three vulnerabilities affecting the Ivanti Cloud Services Appliance (CSA). At the time of the investigation, two out of the three identified vulnerabilities were not publicly known. This incident is a prime example of how threat actors chain zero-day ...