CVE-2026-8451

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

CVSS v3 7.5 HIGH

7.5^/10

CVSS v3 : HIGH

Vector :

Exploitability : 3.9 / Impact : 3.6

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact NONE

Availability Impact NONE

Scope UNCHANGED

References

Link	Resource
https://support.citrix.com/support-home/kbsearch/article?articleNumber=CTX696604	Vendor Advisory

Configurations

Configuration 1 (hide)

OR	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:::::-:::*
	cpe:2.3:a:citrix:netscaler_application_delivery_controller:14.1-66.68::::fips:::
	cpe:2.3:a:citrix:netscaler_gateway::::::::
	cpe:2.3:a:citrix:netscaler_gateway::::::::

History

No history.

Information

Published : 2026-06-30 13:19

Updated : 2026-07-01 15:52

NVD link : CVE-2026-8451

Mitre link : CVE-2026-8451

CVE.ORG link : CVE-2026-8451

JSON object : View

Products Affected

citrix

netscaler_gateway
netscaler_application_delivery_controller

CWE

CWE-125

Out-of-bounds Read

{"id": "CVE-2026-8451", "cveTags": [], "metrics": {"ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-8451", "role": "CISA Coordinator", "options": [{"exploitation": "none"}, {"automatable": "yes"}, {"technicalImpact": "total"}], "version": "2.0.3", "timestamp": "2026-06-30T13:43:33.940474Z"}}], "cvssMetricV31": [{"type": "Primary", "source": "nvd@nist.gov", "cvssData": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 7.5, "attackVector": "NETWORK", "baseSeverity": "HIGH", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N", "integrityImpact": "NONE", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "NONE", "privilegesRequired": "NONE", "confidentialityImpact": "HIGH"}, "impactScore": 3.6, "exploitabilityScore": 3.9}], "cvssMetricV40": [{"type": "Secondary", "source": "50a63c94-1ea7-4568-8c11-eb79e7c5a2b5", "cvssData": {"Safety": "NOT_DEFINED", "version": "4.0", "Recovery": "NOT_DEFINED", "baseScore": 8.8, "Automatable": "NOT_DEFINED", "attackVector": "NETWORK", "baseSeverity": "HIGH", "valueDensity": "NOT_DEFINED", "vectorString": "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", "exploitMaturity": "NOT_DEFINED", "providerUrgency": "NOT_DEFINED", "userInteraction": "NONE", "attackComplexity": "LOW", "attackRequirements": "NONE", "privilegesRequired": "NONE", "subIntegrityImpact": "NONE", "vulnIntegrityImpact": "LOW", "integrityRequirement": "NOT_DEFINED", "modifiedAttackVector": "NOT_DEFINED", "subAvailabilityImpact": "NONE", "vulnAvailabilityImpact": "HIGH", "availabilityRequirement": "NOT_DEFINED", "modifiedUserInteraction": "NOT_DEFINED", "modifiedAttackComplexity": "NOT_DEFINED", "subConfidentialityImpact": "NONE", "vulnConfidentialityImpact": "HIGH", "confidentialityRequirement": "NOT_DEFINED", "modifiedAttackRequirements": "NOT_DEFINED", "modifiedPrivilegesRequired": "NOT_DEFINED", "modifiedSubIntegrityImpact": "NOT_DEFINED", "modifiedVulnIntegrityImpact": "NOT_DEFINED", "vulnerabilityResponseEffort": "NOT_DEFINED", "modifiedSubAvailabilityImpact": "NOT_DEFINED", "modifiedVulnAvailabilityImpact": "NOT_DEFINED", "modifiedSubConfidentialityImpact": "NOT_DEFINED", "modifiedVulnConfidentialityImpact": "NOT_DEFINED"}}]}, "affected": [{"source": "50a63c94-1ea7-4568-8c11-eb79e7c5a2b5", "affectedData": [{"vendor": "NetScaler", "product": "ADC", "versions": [{"status": "affected", "version": "14.1", "lessThan": "72.61", "versionType": "patch"}, {"status": "affected", "version": "13.1", "lessThan": "63.18", "versionType": "patch"}, {"status": "affected", "version": "14.1 FIPs", "lessThan": "72.61", "versionType": "patch"}, {"status": "affected", "version": "13.1 FIPS and NDcPP", "lessThan": "37.272", "versionType": "patch"}], "defaultStatus": "unaffected"}, {"vendor": "NetScaler", "product": "Gateway", "versions": [{"status": "affected", "version": "14.1", "lessThan": "72.61", "versionType": "patch"}, {"status": "affected", "version": "13.1", "lessThan": "63.18", "versionType": "patch"}], "defaultStatus": "unaffected"}]}], "published": "2026-06-30T13:19:33.347", "references": [{"url": "https://support.citrix.com/support-home/kbsearch/article?articleNumber=CTX696604", "tags": ["Vendor Advisory"], "source": "50a63c94-1ea7-4568-8c11-eb79e7c5a2b5"}], "vulnStatus": "Analyzed", "weaknesses": [{"type": "Secondary", "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "description": [{"lang": "en", "value": "CWE-125"}]}], "descriptions": [{"lang": "en", "value": "Insufficient input validation in\u00a0NetScaler ADC and NetScaler Gateway\u00a0leading to memory overread if\u00a0NetScaler ADC or NetScaler Gateway is configured as a SAML IDP"}], "lastModified": "2026-07-01T15:52:58.800", "configurations": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:a:citrix:netscaler_application_delivery_controller:*:*:*:*:fips:*:*:*", "vulnerable": true, "matchCriteriaId": "D8189708-5190-45E3-BF9A-7A429E87DFE7", "versionEndExcluding": "13.1-37.272"}, {"criteria": "cpe:2.3:a:citrix:netscaler_application_delivery_controller:*:*:*:*:ndcpp:*:*:*", "vulnerable": true, "matchCriteriaId": "D93A5760-5C50-4786-B981-24A7B35C3055", "versionEndExcluding": "13.1-37.272"}, {"criteria": "cpe:2.3:a:citrix:netscaler_application_delivery_controller:*:*:*:*:-:*:*:*", "vulnerable": true, "matchCriteriaId": "BC139A27-D7CE-4D92-9A1F-09713C4C9546", "versionEndExcluding": "13.1-63.18", "versionStartIncluding": "13.1"}, {"criteria": "cpe:2.3:a:citrix:netscaler_application_delivery_controller:*:*:*:*:-:*:*:*", "vulnerable": true, "matchCriteriaId": "0108075C-1047-449C-A707-F2532770C2AD", "versionEndExcluding": "14.1-72.61", "versionStartIncluding": "14.1"}, {"criteria": "cpe:2.3:a:citrix:netscaler_application_delivery_controller:14.1-66.68:*:*:*:fips:*:*:*", "vulnerable": true, "matchCriteriaId": "A2BC089B-97D0-4FDB-A336-74409DCDC5E3"}, {"criteria": "cpe:2.3:a:citrix:netscaler_gateway:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "962D2276-7285-41E2-A867-D464AE11677F", "versionEndExcluding": "13.1-63.18", "versionStartIncluding": "13.1"}, {"criteria": "cpe:2.3:a:citrix:netscaler_gateway:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "1591FBCE-57DD-416F-A858-E898B0946AB6", "versionEndExcluding": "14.1-72.61", "versionStartIncluding": "14.1"}], "operator": "OR"}]}], "sourceIdentifier": "50a63c94-1ea7-4568-8c11-eb79e7c5a2b5"}