CVE Tools
Sign in

CVE-2026-3055

Insufficient input validation leading to memory overread

Published: Mar 23, 2026Updated: Mar 31, 2026 Sources: CVE List NVD BDUCWE-125
9.8CRITICAL
NVD MITRE
EPSS Score
84.0%
Top 0.3%
CISA KEV
Active Exploitation
Since Mar 30, 2026
Exploits
No Known Exploits
Remediation
Patch Available

Description

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

No summary for this CVE yet.

CVSS Vector Breakdown

AV:NAC:LPR:NUI:NS:UC:HI:HA:H
Exploitability
AV:NAttack Vector
Network
AC:LAttack Complexity
Low
PR:NPrivileges Required
None
UI:NUser Interaction
None
Scope
S:UScope
Unchanged
Impact
C:HConfidentiality
High
I:HIntegrity
High
A:HAvailability
High
Open in CVSS calculator →

Weaknesses

CWE-125

Affected Products

Citrix ADCCitrix Systems Inc.
SaaSSaaS Service
Cloud & SaaS / api-gateway
NetScaler GatewayCitrix Systems Inc.
On-premNetwork Device
Networking Infrastructure
NetScaler ADC FIPSCitrix Systems Inc.
Mixed
Cloud & SaaS
NetScaler ADC NDcPPCitrix Systems Inc.
Mixed
Cloud & SaaS
ADCNetScaler
On-prem
Networking Infrastructure / load-balancer-proxy
citrix systems inc.commercialUSCloud & SaaSaka citrix adc, netscaler gateway, citrix gateway
netscalercommercialNetworking Infrastructure
and 3 more affected products View all →

Exploitability

CISA Known Exploited Vulnerability
Added to KEV:Mar 30, 2026
Remediation due:Apr 2, 2026

Required action: Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.

Official Patch Available
Am I actually vulnerable?1 Nuclei template available — see how to check your systems. How to verify Rather we check it for you?We'll check your whole external perimeter for exposure — free. Check my exposure

Attack Graph

Products CVE Techniques Tactics

Click technique nodes to view MITRE ATT&CK details. Scroll to zoom, drag to pan.

MITRE ATT&CK

1 technique
Collection
View detailed technique mapping

References

https://support.citrix.com/support-home/kbsearch/article?articleNumber=CTX696300
support.citrix.com
https://labs.watchtowr.com/please-we-beg-just-one-weekend-free-of-appliances-citrix-netscaler-cve-2026-3055-memory-overread-part-2/
labs.watchtowr.com
https://www.cisa.gov/sites/default/files/csv/known_exploited_vulnerabilities.csv
cisa.gov
and 1 more references View all →

Timeline

Published
Mar 23, 2026
Added to CISA KEV
Mar 30, 2026
Last Updated
Mar 31, 2026
News mentions
3

Unlock Complete Vulnerability Intelligence

Get the full picture for CVE-2026-3055 and every CVE in our database. Create a free account — no credit card required.

Create Free Account
Plain-language analysis
Impact assessment and exploitation scenario in plain English
Attack graph visualization
Interactive attack path and kill chain mapping
Exploit details & PoC links
ExploitDB, Metasploit, GitHub PoCs with direct links
Nuclei scanner templates
Ready-to-use vulnerability scanner templates
Full remediation guide
Patch instructions, workarounds, and compliance impact
Interactive AI chat
Ask questions about this vulnerability in natural language
Related vulnerabilities
Semantically similar CVEs and attack patterns
REST API & MCP access
Integrate vulnerability data into your workflows