CVE-2026-8451

CVE Enrichment

CVSS: 8.8 HIGH
EPSS: 0.50%
EPSS Percentile: 42.91%
CISA KEV: Not listed

Description

Insufficient input validation in NetScaler ADC and NetScaler Gateway leading to memory overread if NetScaler ADC or NetScaler Gateway is configured as a SAML IDP

Technical Details

CVSS Version: 4.0
CNA / NVD Source: 50a63c94-1ea7-4568-8c11-eb79e7c5a2b5
Published: 30-Jun-2026 20:19
Last Modified: 01-Jul-2026 22:52
EPSS Date: 2026-10-29
CWE: CWE-125

CVSS Vector


            CVSS:4.0                            AV:N /
                            AC:L /
                            AT:N /
                            PR:N /
                            UI:N /
                            VC:H /
                            VI:L /
                            VA:H /
                            SC:N /
                            SI:N /
                            SA:N /
                            E:X /
                            CR:X /
                            IR:X /
                            AR:X /
                            MAV:X /
                            MAC:X /
                            MAT:X /
                            MPR:X /
                            MUI:X /
                            MVC:X /
                            MVI:X /
                            MVA:X /
                            MSC:X /
                            MSI:X /
                            MSA:X /
                            S:X /
                            AU:X /
                            R:X /
                            V:X /
                            RE:X /
                            U:X

Affected Products / Versions

citrix / netscaler_application_delivery_controller
Version / affected range: * · before (exclusive) 13.1-37.272
cpe:2.3:a:citrix:netscaler_application_delivery_controller:*:*:*:*:fips:*:*:*
citrix / netscaler_application_delivery_controller
Version / affected range: * · before (exclusive) 13.1-37.272
cpe:2.3:a:citrix:netscaler_application_delivery_controller:*:*:*:*:ndcpp:*:*:*
citrix / netscaler_application_delivery_controller
Version / affected range: * · from (inclusive) 13.1 · before (exclusive) 13.1-63.18
cpe:2.3:a:citrix:netscaler_application_delivery_controller:*:*:*:*:-:*:*:*
citrix / netscaler_application_delivery_controller
Version / affected range: * · from (inclusive) 14.1 · before (exclusive) 14.1-72.61
cpe:2.3:a:citrix:netscaler_application_delivery_controller:*:*:*:*:-:*:*:*
citrix / netscaler_application_delivery_controller
Version / affected range: 14.1-66.68
cpe:2.3:a:citrix:netscaler_application_delivery_controller:14.1-66.68:*:*:*:fips:*:*:*
citrix / netscaler_gateway
Version / affected range: * · from (inclusive) 13.1 · before (exclusive) 13.1-63.18
cpe:2.3:a:citrix:netscaler_gateway:*:*:*:*:*:*:*:*
citrix / netscaler_gateway
Version / affected range: * · from (inclusive) 14.1 · before (exclusive) 14.1-72.61
cpe:2.3:a:citrix:netscaler_gateway:*:*:*:*:*:*:*:*

References

50a63c94-1ea7-4568-8c11-eb79e7c5a2b5

Last enrichment sync: 30-Oct-2026 00:34
Sources: NVD · FIRST EPSS · CISA KEV
Latest successful provider update; providers refresh independently.

Reported Context (3)

Tracked as CVE-2026-8451 (CVSS score of 8.8), the security defect was disclosed on June 30, when Citrix rolled out patches, and attack surface management company watchTowr published technical details on it. NetScaler CVE-2026-8451 Exploited Within 24 Hours of Disclosure
Four of the issues, tracked as CVE-2026-8451, CVE-2026-8452, CVE-2026-8655, and CVE-2026-10816, are high-severity out-of-bounds read, memory overflow, and arbitrary file read bugs. Citrix Patches NetScaler Flaws, Including HTTP/2 Bomb Vulnerability
Citrix disclosed six vulnerabilities in NetScaler ADC and NetScaler Gateway, including CVE-2026-8451, a high-severity memory disclosure flaw linked to the same class of issues behind CitrixBleed. Citrix Patches Six NetScaler Flaws, Including SAML Memory Disclosure Bug

CVE (6)

People (4)

MITRE ATT&CK (2)

Vendors (1)

Products (6)

Tools (1)

Countries (1)

Note: Related entities, including threat actors, malware, CVEs, MITRE ATT&CK techniques, vendors, products, tools, countries, and industries, are shown when they appear in the same reporting. Their presence does not necessarily mean they were targeted, compromised, vulnerable, responsible for the activity, or directly involved in the incident.