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:
- #StopRansomware: CL0P Ransomware Gang Exploits MOVEit Vulnerability
June 7, 2023
CISA and FBI released a joint Cybersecurity Advisory (CSA) CL0P Ransomware Gang Exploits MOVEit Vulnerability in response to a recent vulnerability exploitation attributed to CL0P Ransomware Gang. This joint guide provides indicators of compromise (IOCs) and tactics, techniques, and procedures (TTPs) identified through FBI investigations as recently as May this year. Additionally, it provides immediate ...
- CISA Releases Two Industrial Control Systems Advisories
June 6, 2023
CISA released two Industrial Control Systems (ICS) advisories on June 6, 2023. These advisories provide timely information about current security issues, vulnerabilities, and exploits surrounding ICS. ICSA-23-157-01 Delta Electronics CNCSoft-B DOPSoft Read more… Source: U.S. Cybersecurity and Infrastructure Security Agency
- Microsoft says Clop ransomware gang is behind MOVEit mass-hacks, as first victims come forward
June 5, 2023
Security researchers have linked to the notorious Clop ransomware gang a new wave of mass-hacks targeting a popular file transfer tool, as the first victims of the attacks begin to come forward. It was revealed last week that hackers are exploiting a newly discovered vulnerability in MOVEit Transfer, a file-transfer tool widely used by enterprises to ...
- CISA Adds Two Known Exploited Vulnerabilities to Catalog
June 5, 2023
CISA has added two new vulnerabilities to its Known Exploited Vulnerabilities Catalog, based on evidence of active exploitation. CVE-2023-33009 Zyxel Multiple Firewalls Buffer Overflow Vulnerability Read more… Source: U.S. Cybersecurity and Infrastructure Security Agency
- Zero-Day Vulnerability in MOVEit Transfer Exploited for Data Theft
June 2, 2023
Mandiant has observed wide exploitation of a zero-day vulnerability in the MOVEit Transfer secure managed file transfer software for subsequent data theft. This vulnerability was announced by Progress Software Corporation on May 31, 2023 and has been assigned CVE-2023-34362. Based on initial analysis from Mandiant incident response engagements, the earliest evidence of exploitation occurred on May ...
- Google entices bug bounty hunters with big offer
June 2, 2023
For 13 years, a key pillar of the Chrome Security ecosystem has included encouraging security researchers to find security vulnerabilities in Chrome browser and report them to us, through the Chrome Vulnerability Rewards Program. Starting today and until 1 December 2023, the first security bug report we receive with a functional full chain exploit, resulting in ...