SOC status:Duty analyst on shift

UK Cyber Defence
VulnerabilityModified

CVE-2018-6809

NetScaler ADC 10.5, 11.0, 11.1, and 12.0, and NetScaler Gateway 10.5, 11.0, 11.1, and 12.0 allow remote attackers to gain privilege on a target system.

CRITICAL 9.8EPSS 4.14%

Does this matter?

High impact if exploited, but EPSS currently rates exploitation as unlikely (4.14%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.

Description

NetScaler ADC 10.5, 11.0, 11.1, and 12.0, and NetScaler Gateway 10.5, 11.0, 11.1, and 12.0 allow remote attackers to gain privilege on a target system.

CVSS 3.0
9.8 CRITICALCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
EPSS
4.14% probability · 91th percentile
Public exploits
None in Exploit-DB
CISA KEV
Not listed
Affected
citrix/netscaler application delivery controller firmware · citrix/netscaler gateway firmware
Source
cve@mitre.org
EPSS trend
0%3%5%27 October 2026: 4.14%27 October 202627 October 2026

EPSS 4.1% since 27 October 2026; no change recorded yet. Points are recorded when the score first appears and whenever it moves by a percentage point or more.

Source: NVD record, EPSS from FIRST.org, KEV from CISA, exploits from Exploit-DB. Refreshed daily. Download this record as JSON.