What is CVE-2025-7775?
Memory overflow vulnerability leading to Remote Code Execution and/or Denial of Service in NetScaler ADC and NetScaler Gateway when NetScaler is configured as Gateway (VPN virtual server, ICA Proxy, CVPN, RDP Proxy) or AAA virtual server (OR) NetScaler ADC and NetScaler Gateway 13.1, 14.1, 13.1-FIPS and NDcPP: LB virtual servers of type (HTTP, SSL or HTTP_QUIC) bound with IPv6 services or servicegroups bound with IPv6 servers (OR) NetScaler ADC and NetScaler Gateway 13.1, 14.1, 13.1-FIPS and NDcPP: LB virtual servers of type (HTTP, SSL or HTTP_QUIC) bound with DBS IPv6 services or servicegroups bound with IPv6 DBS servers (OR) CR virtual server with type HDX
The record classifies CVE-2025-7775 under weakness class CWE-119. Its CVSS v3 base vector states that the flaw is reachable remotely over the network, needs no prior authentication, needs no user interaction, and has high impact on confidentiality, integrity, availability. 4 affected-product entries are recorded, across 1 vendor, listed below. The identifier was first published 405 days ago.
Severity and exploitation probability
- CVSS v3.1 base score
- 9.8 — CRITICAL
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H - CVSS v4.0 base score
- 9.2
- EPSS (FIRST)
- 5.7% probability of exploitation in the next 30 days, higher than 90.4% of all scored CVEs
- CISA KEV
- Listed since 2025-08-26, federal remediation deadline 2025-08-28
- Threadlinqs priority
- 9/10 — CISA KEV-listed, which Threadlinqs floors at 9
- Published
- 2025-08-26, last modified 2025-10-24
Is CVE-2025-7775 being exploited?
CISA added CVE-2025-7775 to the Known Exploited Vulnerabilities catalog on 2025-08-26, which means the agency holds evidence of exploitation in the wild; US federal civilian agencies had to remediate it by 2025-08-28 under BOD 22-01. It currently carries a trending score of 38 in the Threadlinqs vulnerability feed.
Affected products and versions
- Citrix: Netscaler Application Delivery Controller, Netscaler Gateway
Showing 2 of 4 recorded product entries.
How to fix CVE-2025-7775
The record marks a vendor fix as available for CVE-2025-7775. Patch reference: https://support.citrix.com/article/CTX585241/netscaler-adc-and-gateway-security-bulletin-cve-2025-7775. Vendor advisory: https://support.citrix.com/support-home/kbsearch/article?articleNumber=CTX694938. Because CVE-2025-7775 is KEV-listed, US federal civilian agencies were required to apply the vendor fix, or stop using the product, by 2025-08-28. Apply the vendor fix referenced above to every affected product listed in this record, then confirm the running version against the vendor advisory.
Threat activity tracking CVE-2025-7775
2 tracked threats in the Threadlinqs corpus reference CVE-2025-7775, either in the campaign’s CVE list or as an indicator on the campaign record.
- Desktop AI Supercomputers, Uncensored Models and Agentic Frameworks (HexStrike-AI) Enable Automated Large-Scale Attacks, incl. CVE-2025-7775 Citrix NetScaler — HIGH · 2026-10-03
- GOLD ENCOUNTER / Payouts King Ransomware Campaign Targeting Business Managers: 351 Victims Across 334 Organizations — HIGH · 2026-08-06
Sources
Seeded from nvd and not yet processed by the Threadlinqs enrichment pipeline, so blank CVSS, EPSS or KEV fields above mean NOT MEASURED rather than measured-absent.