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CVE-2026-88772 is a pre-authentication memory-overflow vulnerability in DTLS processing in Citrix NetScaler ADC and NetScaler Gateway. During DTLS handshake-fragment reassembly, the NetScaler Packet Processing Engine (NSPPE) copies accumulated fragment data into a fixed 35,840-byte scratch buffer without ensuring that the data fits. Malformed fragmented traffic can cause the accumulated data to exceed that buffer, corrupting adjacent memory and potentially enabling remote code execution or denial of service. Exploitation requires DTLS to be enabled, which is the default for VPN virtual servers. Affected releases include ADC and Gateway 14.1 before 14.1-73.37 and 13.1 before 13.1-64.23, ADC 14.1-FIPS before 14.1-73.37 FIPS, and ADC 13.1-FIPS and NDcPP before 13.1-37.279. The vulnerability has been exploited in the wild to obtain root-level access and deploy web shells and tunneling tools.
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1 valid exploit after Mallory filtered fakes, detection scripts, and README-only repos (8 hidden).
The repository contains a README and one standalone Python exploit. Despite being described as a detection-artifact generator, the script performs active exploitation of CVE-2026-88772: it establishes a UDP DTLS association, obtains the DTLS cookie/primer exchange, then sends 120 crafted records intended to corrupt target memory. It contains hard-coded FreeBSD memory addresses, fake timer/list structures, a setcontext pivot, JOP gadgets, a ROP chain, and assembled amd64 shellcode. The payload is tailored to NetScaler version 14.1-73.30 and can write caller-controlled content to a target file; its default action writes "content" to /tmp/file.txt. The code also contains a /bin/sh permission-changing operation, making it substantially more capable than passive vulnerability detection. It is a standalone Python program using pwntools for packing, assembly, shellcode generation, and logging, rather than a module from a named exploit framework.
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Mentioned as background in reports of active exploitation to deploy web shells and tunneling tools on compromised systems. The article does not specify this vulnerability's technical mechanism, affected product versions, or remediation.
Mentioned as background to the main vulnerability disclosure. Active exploitation reportedly involved planting web shells and tunneling tools on compromised systems. The content does not specify this vulnerability's technical mechanism, affected products, or remediation.
An unauthenticated remote code execution vulnerability affecting Citrix NetScaler, reported as actively exploited. Security patches are available, including build 14.1-73.37. The article distinguishes this patched vulnerability from the newly reported SAML-related reboot issue.
One of two CVEs identified as Pitscaler, a previously disclosed vulnerability affecting Citrix NetScaler devices. A newly reported, unnamed zero-day may bypass its existing fix. The article does not establish that the new exploit or observed malware execution specifically exploits this CVE.
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