CVE-2026-8451
Insufficient input validation leading to memory overread
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
INFO
Published Date :
June 30, 2026, 1:19 p.m.
Last Modified :
July 1, 2026, 3:52 p.m.
Remotely Exploit :
Yes !
Source :
50a63c94-1ea7-4568-8c11-eb79e7c5a2b5
Affected Products
The following products are affected by CVE-2026-8451
vulnerability.
Even if cvefeed.io is aware of the exact versions of the
products
that
are
affected, the information is not represented in the table below.
CVSS Scores
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS | 134c704f-9b21-4f2e-91b3-4a467353bcc0 | |||||
| CVSS 3.1 | HIGH | [email protected] | ||||
| CVSS 4.0 | HIGH | 50a63c94-1ea7-4568-8c11-eb79e7c5a2b5 | ||||
| CVSS 4.0 | HIGH | 50a63c94-1ea7-4568-8c11-eb79e7c5a2b5 |
Solution
- Apply vendor-provided updates for NetScaler ADC.
- Apply vendor-provided updates for NetScaler Gateway.
Public PoC/Exploit Available at Github
CVE-2026-8451 has a 8 public
PoC/Exploit available at Github.
Go to the Public Exploits tab to see the list.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2026-8451.
| URL | Resource |
|---|---|
| https://support.citrix.com/support-home/kbsearch/article?articleNumber=CTX696604 | Vendor Advisory |
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2026-8451 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2026-8451
weaknesses.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Professional vulnerability assessment report for NetScaler SAML memory disclosure risk, including technical impact, remediation, and mitigation strategy.
cve-analysis remediation root-cause-analysis security-research technical-writing vulnerability-research
Python
CVE-2026-8451
Ruby
None
Python
Citrix NetScaler CVE Preconditions Checker as per CTX696604 | Supported CVE : CVE-2026-8451, CVE-2026-8452, CVE-2026-8655, CVE-2026-10816, CVE-2026-10817, and CVE-2026-13474
Python
None
Python
Loginsoft Vulnerability Intelligence (LOVI)
一个 CVE 漏洞预警知识库，无 exp/poc，部分包含修复方案。A knowledge base of CVE security vulnerability, no PoCs/exploits.
📡 PoC auto collect from GitHub. ⚠️ Be careful Malware.
security cve exploit poc vulnerability
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2026-8451 vulnerability anywhere in the article.
-
TheCyberThrone
Citrix Fixes 6 Vulnerabilities in NetScaler
July 3, 2026Citrix has released security updates for its widely deployed NetScaler ADC and NetScaler Gateway, patching six vulnerabilities that could expose organizations to arbitrary file reads, memo ... Read more
-
security.nl
'Citrix NetScaler-lek dag na bekendmaking misbruikt bij aanvallen'
Een nieuwe kwetsbaarheid in Citrix NetScaler ADC en Gateway waarvoor op 30 juni een beveiligingsupdate verscheen, is een dag na de bekendmaking misbruikt bij aanvallen, zo meldt cybersecuritybedrijf L ... Read more
-
The Hacker News
Citrix Patches Six NetScaler Flaws Allowing File Read and Denial-of-Service
Citrix on Tuesday released security updates to address multiple flaws in NetScaler ADC (formerly Citrix ADC) and NetScaler Gateway (formerly Citrix Gateway) that could be exploited by an attacker to f ... Read more
The following table lists the changes that have been made to the
CVE-2026-8451 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
-
Initial Analysis by [email protected]
Jul. 01, 2026
Action Type Old Value New Value Added CVSS V3.1 AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N Added CPE Configuration OR *cpe:2.3:a:citrix:netscaler_application_delivery_controller:*:*:*:*:-:*:*:* versions from (including) 13.1 up to (excluding) 13.1-63.18 *cpe:2.3:a:citrix:netscaler_application_delivery_controller:*:*:*:*:-:*:*:* versions from (including) 14.1 up to (excluding) 14.1-72.61 *cpe:2.3:a:citrix:netscaler_application_delivery_controller:*:*:*:*:fips:*:*:* versions up to (excluding) 13.1-37.272 *cpe:2.3:a:citrix:netscaler_application_delivery_controller:*:*:*:*:ndcpp:*:*:* versions up to (excluding) 13.1-37.272 *cpe:2.3:a:citrix:netscaler_application_delivery_controller:14.1-66.68:*:*:*:fips:*:*:* *cpe:2.3:a:citrix:netscaler_gateway:*:*:*:*:*:*:*:* versions from (including) 13.1 up to (excluding) 13.1-63.18 *cpe:2.3:a:citrix:netscaler_gateway:*:*:*:*:*:*:*:* versions from (including) 14.1 up to (excluding) 14.1-72.61 Added Reference Type NetScaler: https://support.citrix.com/support-home/kbsearch/article?articleNumber=CTX696604 Types: Vendor Advisory -
CVE Modified by 134c704f-9b21-4f2e-91b3-4a467353bcc0
Jun. 30, 2026
Action Type Old Value New Value Added CWE CWE-125 Added SSVC {'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'} -
New CVE Received by 50a63c94-1ea7-4568-8c11-eb79e7c5a2b5
Jun. 30, 2026
Action Type Old Value New Value Added Affected [{'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'}] Added 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 Added CVSS V4.0 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 Added Reference https://support.citrix.com/support-home/kbsearch/article?articleNumber=CTX696604