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CVE-2025-5777

7.5
HIGHCVSS v3.1 Base Score
71.45%
HIGH RiskEPSS (99th percentile)
KEV

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

Published: 6/17/2025
Modified: 10/30/2025
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ACTIVELY EXPLOITED IN THE WILD

This vulnerability is listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.

Vulnerability Name:

Citrix NetScaler ADC and Gateway Out-of-Bounds Read Vulnerability

Vendor / Product:

Citrix NetScaler ADC and Gateway

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.

Due Date: 7/11/2025(OVERDUE)
Ransomware Campaign Use
Added to KEV:

7/10/2025

Notes:

https://support.citrix.com/support-home/kbsearch/article?articleNumber=CTX693420 ; https://nvd.nist.gov/vuln/detail/CVE-2025-5777

Vulnerability Summary

CVSS v3 Score

7.5HIGH

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

EPSS Score (Exploitation Probability)

71.45%HIGH Exploitation Risk
99th percentile

This vulnerability has a 71.45% probability of being exploited in the next 30 days, ranking higher than 99% of all scored CVEs.

CWE Classification

Related Vulnerabilities

Same Weakness Type(CWE-125)

Similar SeverityHIGH