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CVE-2023-6549

Published: Jan 17, 2024Updated: Feb 26, 2026 Sources: CVE List NVD BDUCWE-119
8.2HIGH
NVD MITRE
EPSS Score
57.6%
Top 1.0%
CISA KEV
Active Exploitation
Since Jan 17, 2024
Exploits
No Known Exploits
Remediation
Patch Available
Self-Check
Nuclei · OpenVAS

Description

Improper Restriction of Operations within the Bounds of a Memory Buffer in NetScaler ADC and NetScaler Gateway allows Unauthenticated Denial of Service and Out-Of-Bounds Memory Read

No summary for this CVE yet.

CVSS Vector Breakdown

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

Weaknesses

CWE-119

Affected Products

Cloud Software Group
commercial·USaka citrix, application delivery controller firmware, netscaler gateway firmware, xenserver
NetScaler ADCMixed
Cloud & SaaS / cloud-platform
netscaler application delivery controllerOn-premNetwork Device
Networking Infrastructure / load-balancer-proxy
netscaler gatewayOn-premSecurity Product
Networking Infrastructure
Citrix Systems Inc.
commercial·USaka citrix adc, netscaler gateway, citrix gateway
NetScaler Application Delivery ControllerOn-premNetwork Device
Networking Infrastructure / load-balancer-proxy
NetScaler GatewayOn-premNetwork Device
Networking Infrastructure

Exploitability

CISA Known Exploited Vulnerability
Added to KEV:Jan 17, 2024
Remediation due:Feb 7, 2024

Required action: Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.

Official Patch Available
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Attack Graph

Products CVE Techniques Tactics

Click technique nodes for MITRE ATT&CK details · drag to pan · Ctrl/⌘ + scroll to zoom, or go fullscreen.

MITRE ATT&CK

2 techniques
Initial Access
Privilege Escalation
View detailed technique mapping

References

https://support.citrix.com/article/CTX584986/netscaler-adc-and-netscaler-gateway-security-bulletin-for-cve20236548-and-cve20236549
support.citrix.com
https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2023-6549
cisa.gov
https://www.cybersecurity-help.cz/vdb/SB2024011635
cybersecurity-help.cz
and 1 more references View all →

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