CVE-2025-7776Network attack vector

Denial of service via PCoIP memory overflow

Published Aug 26, 2025 · Updated Aug 27, 2025

Memory overflow in NetScaler ADC and NetScaler Gateway allows remote attackers to interrupt service through a Gateway endpoint. NetScaler identifies an out-of-bounds memory operation but has not published the affected parser, request field, or exact memory-handling error. Reachability requires a Gateway VPN virtual server with a PCoIP profile bound, and exploitation causes unpredictable behavior or a service interruption.

CVSS severity8.8
High
EPSS probability6.90%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
Coverage for this vulnerability

See if you're affected

Explore vulnerability checks for your environment with Hinoki.

Book a demo

Summary

What happened

Memory overflow in NetScaler ADC and NetScaler Gateway allows remote attackers to interrupt service through a Gateway endpoint. NetScaler identifies an out-of-bounds memory operation but has not published the affected parser, request field, or exact memory-handling error. Reachability requires a Gateway VPN virtual server with a PCoIP profile bound, and exploitation causes unpredictable behavior or a service interruption.

The record

CVE
CVE-2025-7776
Published
Aug 26, 2025
Updated
Aug 27, 2025
Vendor
Cloud Software Group
Product
NetScaler Gateway
Classifications
CWE-119, T1498
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Aug 26, 2025CVE publishedPublication date reported by the CVE source.
  2. Aug 27, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=12.1 FIPS and NDcPP <55.330
  2. Affected versionversion=13.1 <59.22
  3. Affected versionversion=13.1 FIPS and NDcPP <37.241
  4. Affected versionversion=14.1 <47.48

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Cloud Software Group · NetScaler Gatewayversion=12.1 FIPS and NDcPP <55.330; version=13.1 <59.22; version=13.1 FIPS and NDcPP <37.241; version=14.1 <47.48
Cloud Software Group · NetScaler ADCversion=12.1 FIPS and NDcPP <55.330; version=13.1 <59.22; version=13.1 FIPS and NDcPP <37.241; version=14.1 <47.48

Published CVSS scores

8.8CitrixCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:H/SC:N/SI:N/SA:L

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-119Improper Restriction of Operations within the Bounds of a Memory Buffer
T1498Network Denial of Service

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

See the directory against your own environment.

Your stack

Check the software in your environment

Book a demo to see how Hinoki identifies affected software and validates exploitability in your environment.

Book a demo