Citrix NetScaler customers hit by third actively exploited zero
Vulnerabilities mentioned
All| CVE | Vulnerability | CVSS | EPSS | Signals | Published |
|---|---|---|---|---|---|
| CVE-2023-4966 | Info-Disclosure Buffer Overflow (CitrixBleed) in Citrix NetScaler ADC/Gateway | 7.5 | 100% | KEVRansomware | KEV |
| CVE-2025-5777 | Out-of-Bounds Read (Memory Overread) in Citrix NetScaler ADC and Gateway | 9.3 | 100% | KEVRansomware | KEV |
| CVE-2025-6543 | Memory Buffer Overflow in Citrix NetScaler ADC and Gateway Exploited in the Wild | 9.2 | 10% | KEV | KEV |
| CVE-2025-7775 | Actively Exploited Memory Overflow RCE/DoS in Citrix NetScaler ADC/Gateway | 9.2 | 21% | KEV | KEV |
| CVE-2025-7776 | Memory overflow vulnerability leading to unpredictable or erroneous behavior and Denial of Service in NetScaler ADC and NetScaler Gateway when NetScaler is… | 8.8 | 7% | ||
| CVE-2025-8424 | Improper access control on the NetScaler Management Interface in NetScaler ADC and NetScaler Gateway when an attacker can get access to the appliance NSIP… | 8.7 | 3% |
From the original article
3 min read at cyberscoop.com
The vendor, which has been widely targeted, said the memory-overflow vulnerability can result in remote-code execution or denial of service. Citrix and cybersecurity researchers warn a critical, zero-day vulnerability affecting multiple versions of Citrix NetScaler products is under active exploitation.
By @CyberScoopNews · cyberscoop.com
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