🔴 Critical: Citrix NetScaler CVE-2026-88772 Exploit Details Show Pre-Auth Path to Shellcode Execution
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Cybersecurity researchers have published technical details on a critical flaw in Citrix NetScaler ADC and Gateway that has already seen active exploitation in the wild.
The vulnerability, tracked as CVE-2026-88772, carries a CVSS score of 9.5. It is a memory overflow bug in the handling of the Datagram Transport Layer Security (DTLS) protocol, with the root cause residing within NetScaler itself. Exploitation details released by researchers describe a pre-authentication path that can lead to shellcode execution, meaning an attacker may be able to trigger the flaw and run code without first logging in.
Key points to note:
- Affected products: Citrix NetScaler ADC and NetScaler Gateway
- Vulnerability type: memory overflow in DTLS protocol handling
- Attack vector: pre-authentication, potentially leading to shellcode execution
- Status: patched, but actively exploited in the wild
Given the pre-auth nature of the flaw, organizations running exposed NetScaler ADC or Gateway instances should treat this as high priority and confirm they are running a patched version.
Source: The Hacker News
Has your organization already applied the patch, or are you still assessing exposure on internet-facing NetScaler appliances?
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