CVE WatchOct 8, 2026

CVE-2025-5777

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

CVSS

7.5

High

EPSS

100.0%

p100

KEV

YES

Jul 10, 2025

Exploit Today

0-100

Published: Jun 17, 2025 · Last modified: Oct 8, 2026 · CWE-125 · CWE-908

EPSS · 30d

100.0%EPSS · 30 days100.0%

2026-09-162026-10-14

KEV catalog record

Product

Citrix / NetScaler ADC and Gateway

Vulnerability

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

Added to KEV

Jul 10, 2025

Remediate by

Jul 11, 2025

Known ransomware use

Yes

Summary description

Citrix NetScaler ADC and Gateway contain an out-of-bounds read vulnerability due to insufficient input validation. This vulnerability can lead to memory overread when the NetScaler is configured as a Gateway (VPN virtual server, ICA Proxy, CVPN, RDP Proxy) OR AAA virtual server.

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.

Notes

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

Technical 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

Official references

Related CVEs

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