# CVE-2025-5777: NetScaler ADC and NetScaler Gateway - Insufficient input validation leading to memory overread

> CVE-2025-5777: NetScaler ADC and NetScaler Gateway - Insufficient input validation leading to memory overread. CVSS 7.5 (CVSS 3.1), in CISA KEV.

Canonical: https://rewindex.com/cve/CVE-2025-5777
Last updated: 2026-10-08T10:35:53Z

- Published: 2025-06-17 12:29 UTC · Updated: 2026-10-08 10:35 UTC · Assigner: Citrix
- CVSS: 7.5 (CVSS 3.1) · Severity: High · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
- EPSS: 100.0%, 100th percentile (scored 2026-10-25)
- CISA KEV: yes, added 2025-07-10, federal due date 2025-07-11, ransomware use: Known
- CWE: CWE-125

## 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

## CISA required action

Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.

## Affected vendors and products

- NetScaler: ADC
- NetScaler: Gateway

## References

- [CVE record on cve.org](https://www.cve.org/CVERecord?id=CVE-2025-5777)
- [NVD entry](https://nvd.nist.gov/vuln/detail/CVE-2025-5777)
- [https://support.citrix.com/support-home/kbsearch/article?articleNumber=CTX693420](https://support.citrix.com/support-home/kbsearch/article?articleNumber=CTX693420)

---

_Sources: CVE records from the CVE Program (cve.org). CVE® is a registered trademark of The MITRE Corporation. (https://www.cve.org/) This product uses data from the NVD API but is not endorsed or certified by the NVD. (https://nvd.nist.gov/) Known Exploited Vulnerabilities catalog from CISA. (https://www.cisa.gov/known-exploited-vulnerabilities-catalog) EPSS scores from FIRST (Exploit Prediction Scoring System). (https://www.first.org/epss/)_


---
Canonical: https://rewindex.com/cve/CVE-2025-5777 · Markdown: https://rewindex.com/cve/CVE-2025-5777.md · JSON: https://rewindex.com/api/v1/cves/CVE-2025-5777 · Data licensed CC BY 4.0 (https://creativecommons.org/licenses/by/4.0/) · Generated 2026-10-26T03:12:28.664Z