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Critical · 9.3 Known exploited · Ransomware Scanner template Public exploit CVE-2025-5777 EUVD-2025-18497GHSA-29vj-j5w5-pcph

NetScaler ADC and NetScaler Gateway - Insufficient input validation leading to memory overread

Published Jun 17, 2025 · Updated Oct 7, 2026 · Assigned by Citrix

Vendor: NetScaler Product: ADC Product: Gateway

Description

Insufficient input validation leading to memory overread when the NetScaler is configured as a Gateway (VPN virtual server, ICA Proxy, CVPN, RDP Proxy) OR AAA virtual server

Affected products

VendorProductAffectedFixed
NetScaler ADC 14.1 – < 43.56, 13.1 – < 58.32 43.56
NetScaler Gateway 14.1 – < 43.56, 13.1 – < 58.32 43.56

Public exploits

Exploit or proof-of-concept code for this vulnerability is publicly available, which lowers the bar for attackers. Treat it as a reason to patch sooner.

Third-party code, not reviewed by us. Public PoCs are sometimes fake or contain malware. Read the code first and run it only in an isolated lab, against systems you are authorised to test.

Exploit-DB 1

GitHub 25 repositories · most starred shown

Sources: PoC-in-GitHub, Metasploit Framework, Exploit-DB — updated daily. Only links are listed; no exploit code is hosted here.

Automated scanner template

A ready-made Nuclei template detects this vulnerability automatically. Vulnerabilities with public scanner templates are typically probed across the internet soon after the template appears — exposed systems should be patched first.

Source: projectdiscovery/nuclei-templates (MIT) — updated daily. Only links are listed.

Advisories 2

References