⚠ Actively exploited
Added to CISA KEV on 2024-01-17. Federal agencies required to patch by 2024-02-07. Required action: Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable..
CVE-2023-6549 — Improper Restriction of Operations within the Bounds of a Memory Buffer in Software Group Netscaler ADC
Severity
7.5HIGHNVD
VulnCheck8.2VulnCheck5.5
EPSS
76.5%
top 1.06%
CISA KEV
KEV
Added 2024-01-17
Due 2024-02-07
Exploit
Exploited in wild
Active exploitation observed
Affected products
Timeline
PublishedJan 17
KEV addedJan 17
KEV dueFeb 7
Latest updateJul 2
CISA Required Action: Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.
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
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:HExploitability: 3.9 | Impact: 3.6
Affected Packages8 packages
🔴Vulnerability Details
2💥Exploits & PoCs
1Nuclei▶
Citrix Netscaler ADC & Gateway - Out-Of-Bounds Memory Read
🔍Detection Rules
1Suricata▶
ET WEB_SPECIFIC_APPS Citrix Netscaler ADC & Gateway Unauthenticated Out-of-Bounds Memory Read (CVE-2023-6549)↗2025-07-02