Detections
Analytics

CVE-2026-8451

high

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

References

https://www.securityweek.com/recent-citrix-netscaler-vulnerability-exploited-in-the-wild/

https://thehackernews.com/2026/08/critical-netscaler-flaw-can-bypass.html

https://www.darkreading.com/vulnerabilities-threats/citrixbleed-ing-again-netscaler-vulnerability-under-attack

https://www.securityweek.com/new-citrixbleed-vulnerability-exploited-immediately-after-public-disclosure/

https://thehackernews.com/2026/07/citrix-patches-six-netscaler-flaws.html

https://www.securityweek.com/citrix-patches-netscaler-vulnerabilities-including-new-http-2-bomb-attack/

https://cyberscoop.com/citrix-netscaler-flaw-cve-2026-8451-citrixbleed/

https://github.com/attarwahyup/Netscaler-CVE-2026-8451

https://github.com/derekpreston81/CVE_ADC_IOC_2026

https://github.com/watchtowrlabs/watchTowr-vs-Netscaler-CVE-2026-8451

https://github.com/HORKimhab/poc-cve-collection

https://support.citrix.com/support-home/kbsearch/article?articleNumber=CTX696604

Details

Source: Mitre, NVD

Published: 2026-06-30

Updated: 2026-07-01

Risk Information

CVSS v2

Base Score: 7.8

Vector: CVSS2#AV:N/AC:L/Au:N/C:C/I:N/A:N

Severity: High

CVSS v3

Base Score: 7.5

Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

Severity: High

CVSS v4

Base Score: 8.8

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

Severity: High

EPSS

EPSS: 0.15654

Vulnerability Watch

Tenable Research has classified this CVE under the following Vulnerability Watch classification, which includes active and historical (inactive) classifications. You can learn more about these classifications on our blog.

Vulnerability of Interest