Detections
Analytics

CVE-2025-7776

high

Description

Memory overflow vulnerability leading to unpredictable or erroneous behavior and Denial of Service in NetScaler ADC and NetScaler Gateway when NetScaler is configured as a Gateway (VPN virtual server, ICA Proxy, CVPN, RDP Proxy) with PCoIP Profile bounded to it

References

https://www.bleepingcomputer.com/news/security/hackers-use-new-hexstrike-ai-tool-to-rapidly-exploit-n-day-flaws/

https://www.theregister.com/2025/08/28/thousands_of_citrix_netscaler_boxes/

https://www.securityweek.com/citrix-patches-exploited-netscaler-zero-day/

https://www.infosecurity-magazine.com/news/citrix-patch-netscaler-zero-days/

https://www.bleepingcomputer.com/news/security/over-28-200-citrix-instances-vulnerable-to-actively-exploited-rce-bug/

https://securityaffairs.com/181615/security/u-s-cisa-adds-citrix-netscaler-flaw-to-its-known-exploited-vulnerabilities-catalog-2.html

https://securityaffairs.com/181614/hacking/over-28000-citrix-instances-remain-exposed-to-critical-rce-flaw-cve-2025-7775.html

https://www.theregister.com/2025/08/26/citrix_patches_trio_of_netscaler/

https://www.helpnetsecurity.com/2025/08/26/netscaler-adc-gateway-zero-day-exploited-by-attackers-cve-2025-7775/

https://www.darkreading.com/vulnerabilities-threats/citrix-zero-day-under-active-attack

https://www.bleepingcomputer.com/news/security/citrix-fixes-critical-netscaler-rce-flaw-exploited-in-zero-day-attacks/

https://thehackernews.com/2025/08/citrix-patches-three-netscaler-flaws.html

https://securityaffairs.com/181567/hacking/citrix-fixed-three-netscaler-flaws-one-of-them-actively-exploited-in-the-wild.html

https://cyberscoop.com/citrix-netscaler-zero-day-exploited-august-2025/

https://support.citrix.com/support-home/kbsearch/article?articleNumber=CTX694938

Details

Source: Mitre, NVD

Published: 2025-08-26

Updated: 2025-09-03

Risk Information

CVSS v2

Base Score: 10

Vector: CVSS2#AV:N/AC:L/Au:N/C:C/I:C/A:C

Severity: Critical

CVSS v3

Base Score: 9.8

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

Severity: Critical

CVSS v4

Base Score: 8.8

Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:H/SC:N/SI:N/SA:L

Severity: High

EPSS

EPSS: 0.00042