Home/CVE/Memory overflow vulnerability leading to unpredictable or erroneous behavior and Denial of Service in NetScaler ADC an
CVE

CVE-2025-7776

Memory overflow vulnerability leading to unpredictable or erroneous behavior and Denial of Service in NetScaler ADC an

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.

CRITICAL · CVSS 9.8 EPSS 0.00316
Schedule remediation
  • SSVC automatable: yes - attacks can be scripted at scale
  • CVSS base score ≥ 7.0
Sigma rules0 YARA rules0
⬡

Weakness Classification

CWE-119Improper Restriction of Operations within the Bounds of a Memory Buffer
▤

Affected Products & Versions

6
citrix netscaler application delivery controller>= 12.1 and < 12.1-55.330
citrix netscaler application delivery controller>= 13.1 and < 13.1-37.241
citrix netscaler application delivery controller>= 13.1 and < 13.1-59.22
citrix netscaler application delivery controller>= 14.1 and < 14.1-47.48
citrix netscaler gateway>= 13.1 and < 13.1-59.22
citrix netscaler gateway>= 14.1 and < 14.1-47.48
▣

Scoring & Timeline

9.8
CRITICAL · CVSS v3.1 · secure@citrix.com
View on NVD
Attack Vector
Network Adjacent Local Physical
Attack Complexity
Low High
Privileges Required
None Low High
User Interaction
None Required
Scope
Unchanged Changed
Confidentiality
None Low High
Integrity
None Low High
Availability
None Low High
Published to NVD26 Aug 2025 · 01:15 PM
CVSS VectorCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
SSVC triage · cisa-vulnrichment
Exploitation
none
Automatable
yes
Technical impact
partial
SSVC asks the questions that actually drive patch urgency: is it being exploited, can attacks be automated, and how total is the impact.
🔗

References & Sources

1
Source URLs (vendor pages, mailing lists, write-ups). Exploit/PoC links are in their own section above to avoid duplication.
https://support.citrix.com/support-home/kbsearch/article?articleNumber=CTX694938Vendor Advisory
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