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CVE-2025-7776

Citrix NetScaler Gateway buffer overflow

9.8 CRITICALEPSS 8.21%
  1. Published26 Aug 2025

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

CVSS 3.1 breakdown

Attack vectorNetwork
Attack complexityLow
Privileges requiredNone
User interactionNone
ScopeUnchanged
ConfidentialityHigh
IntegrityHigh
AvailabilityHigh
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Affected products

Citrix NetScaler Application Delivery Controller≥ 13.1 < 13.1-59.22 · ≥ 14.1 < 14.1-47.48 · ≥ 12.1 < 12.1-55.330 · ≥ 13.1 < 13.1-37.241
Citrix NetScaler Gateway≥ 13.1 < 13.1-59.22 · ≥ 14.1 < 14.1-47.48

Remediation

Fixed in
Citrix NetScaler Application Delivery Controller≥ 13.1-59.22
Citrix NetScaler Gateway≥ 13.1-59.22

References

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Frequently asked

Is CVE-2025-7776 being actively exploited?

CVE-2025-7776 is not in the CISA KEV catalog. Its EPSS exploit probability is 8.21%.

How severe is CVE-2025-7776?

CVE-2025-7776 has a CVSS 3.1 base score of 9.8, rated critical. EPSS estimates a 8.21% probability of exploitation.

Which products are affected by CVE-2025-7776?

Affected products include Citrix NetScaler Application Delivery Controller, Citrix NetScaler Gateway.

How do I fix CVE-2025-7776?

Upgrade affected software to a fixed version, for example Citrix NetScaler Application Delivery Controller 13.1-59.22, Citrix NetScaler Gateway 13.1-59.22 or later, then confirm no affected versions remain in your inventory.

How Secuno handles this

Secuno correlates vulnerabilities like CVE-2025-7776 against the real software inventory on every managed device, every day. Rather than a static severity, each match is scored in context: exploit availability, EPSS, the asset's exposure, and business criticality decide where it lands in the queue. If an affected version is present anywhere across your portfolio, it surfaces automatically with a prioritised remediation path.

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Data from the NVD, CISA KEV catalog and FIRST EPSS. CVSS 3.1 base score shown where available.