Ethical Hacking News
Experts have sounded an alarm about over 28,200 exposed Citrix NetScaler ADC/Gateway instances that remain vulnerable to a critical RCE flaw known as CVE-2025-7775. The US CISA has added this vulnerability to its Known Exploited Vulnerabilities (KEV) catalog, urging federal agencies to patch their systems immediately.
Over 28,200 Citrix NetScaler ADC/Gateway instances are exposed to a critical Remote Code Execution (RCE) flaw known as CVE-2025-7775. Citrix has acknowledged three security flaws, including CVE-2025-7775, in its NetScaler ADC and NetScaler Gateway products. The US CISA has added the Citrix NetScaler flaw to its Known Exploited Vulnerabilities (KEV) catalog to alert federal agencies to take prompt action to patch their systems. Most vulnerable instances are located in the United States, Germany, the UK, the Netherlands, and Switzerland. CVE-2025-7775 is a memory overflow vulnerability that leads to Remote Code Execution and/or Denial-of-Service. Organizations are advised to prioritize immediate patching of vulnerable Citrix instances to mitigate the risk associated with this vulnerability.
The world of cybersecurity is never short on alarming news, but a recent discovery has sent shockwaves across the globe. According to experts at the Shadowserver Foundation, over 28,200 instances of Citrix NetScaler ADC/Gateway remain exposed to a critical Remote Code Execution (RCE) flaw known as CVE-2025-7775. This vulnerability has already been actively exploited in the wild, and it is imperative that organizations take immediate action to patch their systems.
Citrix itself has acknowledged three security flaws – including the aforementioned CVE-2025-7775 – in its NetScaler ADC and NetScaler Gateway products. The severity of this issue was underscored by Citrix's statement that exploits of CVE-2025-7775 have been observed on unmitigated appliances. In simpler terms, if an organization has not applied the necessary patches to their Citrix systems, they are already vulnerable to exploitation.
The United States Cybersecurity and Infrastructure Security Agency (CISA) has taken swift action in response to this situation by adding the Citrix NetScaler flaw to its Known Exploited Vulnerabilities (KEV) catalog. This move is aimed at alerting federal agencies to the existence of this vulnerability and urging them to take prompt action to patch their systems.
The Shadowserver Foundation, which initially reported on this vulnerability, has also provided detailed information about the scope of the issue. While most vulnerable instances are located in the United States (10,100), with significant numbers also found in Germany (4,300), the United Kingdom (1,400), the Netherlands (1,300), and Switzerland (1,300). These numbers highlight the widespread nature of this vulnerability.
CVE-2025-7775 is a memory overflow vulnerability that leads to Remote Code Execution and/or Denial-of-Service. In simpler terms, it enables an attacker to execute malicious code on a vulnerable system, potentially leading to unauthorized access or even complete system compromise. This type of vulnerability highlights the need for robust security measures in place.
The importance of this discovery cannot be overstated. The fact that over 28,200 instances remain exposed to this critical RCE flaw underscores the ongoing threat landscape and the need for vigilance among organizations. It is crucial that they take swift action to patch their systems and mitigate the risk associated with this vulnerability.
In light of this situation, organizations are advised to prioritize immediate patching of vulnerable Citrix instances. This may involve applying updates as soon as possible or taking alternative measures to mitigate the risk until a permanent fix can be applied.
Related Information:
https://www.ethicalhackingnews.com/articles/28200-Citrix-Instances-Exposed-to-Critical-RCE-Flaw-A-Global-Security-Alert-ehn.shtml
https://securityaffairs.com/181614/hacking/over-28000-citrix-instances-remain-exposed-to-critical-rce-flaw-cve-2025-7775.html
https://nvd.nist.gov/vuln/detail/CVE-2025-7775
https://www.cvedetails.com/cve/CVE-2025-7775/
Published: Wed Aug 27 18:08:34 2025 by llama3.2 3B Q4_K_M
