How severe is CVE-2026-8452?

CVE-2026-8452 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-2026-8452 being actively exploited?

Yes. CVE-2026-8452 is on CISA's Known Exploited Vulnerabilities (KEV) catalog, added on 2026-08-26, which means active exploitation has been confirmed. It should be prioritised for remediation.

What products are affected by CVE-2026-8452?

CVE-2026-8452 primarily affects Citrix Netscaler Application Delivery Controller. In total, 5 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2026-8452?

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.

When was CVE-2026-8452 published?

CVE-2026-8452 was published on 2026-06-30 and last updated on 2026-08-27.

CVE-2026-8452

CVE-2026-8452 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 2026-08-26). The underlying weakness is classified as CWE-119.

Key facts

Severity: Critical (CVSS 3.x base score 9.8)
CVSS v4: 8.8
EPSS exploit prediction: 1% (62nd percentile)
Actively exploited: Yes — listed in CISA KEV (added 2026-08-26)
Weakness: CWE-119
Affected product: Citrix Netscaler Application Delivery Controller
Published: 2026-06-30
Last modified: 2026-08-27

Description

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

Frequently asked questions

What is CVE-2026-8452?: 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
How severe is CVE-2026-8452?: CVE-2026-8452 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-2026-8452 being actively exploited?: Yes. CVE-2026-8452 is on CISA's Known Exploited Vulnerabilities (KEV) catalog, added on 2026-08-26, which means active exploitation has been confirmed. It should be prioritised for remediation.
What products are affected by CVE-2026-8452?: CVE-2026-8452 primarily affects Citrix Netscaler Application Delivery Controller. In total, 5 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2026-8452?: 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.
When was CVE-2026-8452 published?: CVE-2026-8452 was published on 2026-06-30 and last updated on 2026-08-27.

References

Affected products (5)

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_application_delivery_controller:14.1-66.68:*:*:*:fips:*:*:*
cpe:2.3:a:citrix:netscaler_gateway:*:*:*:*:*:*:*:*

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