How severe is CVE-2025-7775?

CVE-2025-7775 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2025-7775 being actively exploited?

Yes. CVE-2025-7775 is on CISA's Known Exploited Vulnerabilities (KEV) catalog, added on 2025-08-26, which means active exploitation has been confirmed. It should be prioritised for remediation.

What products are affected by CVE-2025-7775?

CVE-2025-7775 primarily affects Citrix Netscaler Application Delivery Controller. In total, 4 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2025-7775?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Because this CVE is known to be actively exploited, treat remediation as urgent — CISA KEV typically sets a short remediation deadline.

Does CVE-2025-7775 have an EU (EUVD) identifier?

Yes. CVE-2025-7775 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-25838. It is also flagged as exploited in the EUVD (since 2025-08-26).

When was CVE-2025-7775 published?

CVE-2025-7775 was published on 2025-08-26 and last updated on 2026-06-17.

CVE-2025-7775

CVE-2025-7775 is a critical-severity vulnerability in Citrix Netscaler Application Delivery Controller with a CVSS 3.x base score of 9.8. It is listed in CISA's Known Exploited Vulnerabilities (KEV) catalog, confirming it has been exploited in the wild (added 2025-08-26). The underlying weakness is classified as CWE-119.

Key facts

Severity: Critical (CVSS 3.x base score 9.8)
CVSS v4: 9.2
EPSS exploit prediction: 19% (97th percentile)
Actively exploited: Yes — listed in CISA KEV (added 2025-08-26)
EU (EUVD) id: EUVD-2025-25838
EU exploitation: Flagged exploited in the ENISA EU Vulnerability Database (since 2025-08-26)
Weakness: CWE-119
Affected product: Citrix Netscaler Application Delivery Controller
Published: 2025-08-26
Last modified: 2026-06-17

Description

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

Frequently asked questions

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
How severe is CVE-2025-7775?: CVE-2025-7775 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2025-7775 being actively exploited?: Yes. CVE-2025-7775 is on CISA's Known Exploited Vulnerabilities (KEV) catalog, added on 2025-08-26, which means active exploitation has been confirmed. It should be prioritised for remediation.
What products are affected by CVE-2025-7775?: CVE-2025-7775 primarily affects Citrix Netscaler Application Delivery Controller. In total, 4 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2025-7775?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Because this CVE is known to be actively exploited, treat remediation as urgent — CISA KEV typically sets a short remediation deadline.
Does CVE-2025-7775 have an EU (EUVD) identifier?: Yes. CVE-2025-7775 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-25838. It is also flagged as exploited in the EUVD (since 2025-08-26).
When was CVE-2025-7775 published?: CVE-2025-7775 was published on 2025-08-26 and last updated on 2026-06-17.

References

Affected products (4)

cpe:2.3:a:citrix:netscaler_application_delivery_controller:*:*:*:*:fips:*:*:*
cpe:2.3:a:citrix:netscaler_application_delivery_controller:*:*:*:*:ndcpp:*:*:*
cpe:2.3:a:citrix:netscaler_application_delivery_controller:*:*:*:*:-:*:*:*
cpe:2.3:a:citrix:netscaler_gateway:*:*:*:*:*:*:*:*

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