CVE-2026-8452KEV · OVERDUECWE-119

Citrix NetScaler ADC and NetScaler Gateway Improper Restriction of Operations within the Bounds of a Memory Buffer Vulnerability

Critical · published June 30, 2026

Patch now

Confirmed exploited, and the score agrees

CVSS calls it critical at 9.8. It is confirmed in active exploitation. It sits in the 62.8th percentile for exploit probability.

56
days past CISA
deadline
CVSS v3.1
9.8
EPSS
1%
Percentile
62.8
In the wild
Confirmed
What it is

Memory overflow vulnerability NetScaler ADC and NetScaler Gateway leading to unpredictable or erroneous behavior and Denial of Service if the appliance is configured as a Gateway (SSL VPN, ICA Proxy, CVPN, RDP Proxy) or AAA virtual server

The record
Technical detail
CVSS v3.1
9.8 · CRITICAL
Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CVSS v4.0
Not supplied
EPSS
0.01011 · 62.8th percentile
Weakness
CWE-119 · Improper Restriction of Operations within the Bounds of a Memory Buffer
Published
2026-06-30T17:19Z
KEV added
2026-08-26 · due 2026-08-29
Affected products (7)
ProductVersionsFixed in
citrix/netscaler_application_delivery_controller< 13.1-37.27213.1-37.272
citrix/netscaler_application_delivery_controller< 13.1-37.27213.1-37.272
citrix/netscaler_application_delivery_controller≥ 13.1, < 13.1-63.1813.1-63.18
citrix/netscaler_application_delivery_controller≥ 14.1, < 14.1-72.6114.1-72.61
citrix/netscaler_application_delivery_controllerall versions—
citrix/netscaler_gateway≥ 13.1, < 13.1-63.1813.1-63.18
citrix/netscaler_gateway≥ 14.1, < 14.1-72.6114.1-72.61
References (2)
https://support.citrix.com/support-home/kbsearch/article?articleNumber=CTX696604 · 50a63c94-1ea7-4568-8c11-eb79e7c5a2b5https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-8452 · 134c704f-9b21-4f2e-91b3-4a467353bcc0
EPSS history
Timeline
  • 26 AUG 00:00Z
    Added to CISA KEV — remediate by Aug 29
    kev
  • 30 JUN 12:41Z
    Memory overflow vulnerability leading to unpredictable or erroneous behavior and Denial of Service
    cvelistv5