CVE-2023-3466 [High] | Input Validation Bypass in Netscaler Application Del…

CVE-2023-3466 is rated High Risk (65/100): CVSS High severity, with medium exploitation likelihood (EPSS 3.04%). EPSS rose +1.80% over the last day, indicating growing attacker interest. High exploitation likelihood—assess exposure and prioritize remediation.

#	Date	Old EPSS score	New EPSS score	Delta (New - Old)
1	2026-06-15	1.24%	3.04%	+1.80%
2	2026-04-13	1.12%	1.24%	+0.12%
3	2026-03-04	—	1.12%	—

Date

Old EPSS score

New EPSS score

Delta (New - Old)

2026-06-15

1.24%

3.04%

+1.80%

2026-04-13

1.12%

1.24%

+0.12%

2026-03-04

—

1.12%

—

Base score	Version	Severity	Vector	Exploitability	Impact	Score source
8.3	3.1	HIGH	`CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:H/I:H/A:H` Click to expand Attack vector (AV:N) Could be attacked over the internet or any normal routed network—not just someone sitting at the machine. Attack complexity (AC:H) Even with access, the exploit needs extra luck, timing, or a fussy environment to actually work. Privileges required (PR:N) No account or special rights needed—anonymous or random user is enough. User interaction (UI:R) A real person has to do something—click, install, enable—otherwise it doesn’t land. Scope (S:C) Breaking this can reach past the original component and bite other resources—bigger blast radius. Confidentiality (C:H) Serious risk that confidential data gets exposed in a big way. Integrity (I:H) They could widely tamper with or forge data—trust in the data is badly hurt. Availability (A:H) Could take the service down hard or make it unusable for people who depend on it.	1.6	6.0	[email protected]
6.1	3.1	MEDIUM	`CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N` Click to expand Attack vector (AV:N) Could be attacked over the internet or any normal routed network—not just someone sitting at the machine. Attack complexity (AC:L) Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup. Privileges required (PR:N) No account or special rights needed—anonymous or random user is enough. User interaction (UI:R) A real person has to do something—click, install, enable—otherwise it doesn’t land. Scope (S:C) Breaking this can reach past the original component and bite other resources—bigger blast radius. Confidentiality (C:L) Some sensitive info could get out, but not a total data dump. Integrity (I:L) Attackers could change some data, but it’s limited—not everything goes. Availability (A:N) Service keeps running; no real outage angle.	2.8	2.7	[email protected]

Base score

Version

Severity

Vector

Exploitability

Impact

Score source

8.3

3.1

HIGH

CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:H/I:H/A:H Click to expand

Attack vector (AV:N): Could be attacked over the internet or any normal routed network—not just someone sitting at the machine.
Attack complexity (AC:H): Even with access, the exploit needs extra luck, timing, or a fussy environment to actually work.
Privileges required (PR:N): No account or special rights needed—anonymous or random user is enough.
User interaction (UI:R): A real person has to do something—click, install, enable—otherwise it doesn’t land.
Scope (S:C): Breaking this can reach past the original component and bite other resources—bigger blast radius.
Confidentiality (C:H): Serious risk that confidential data gets exposed in a big way.
Integrity (I:H): They could widely tamper with or forge data—trust in the data is badly hurt.
Availability (A:H): Could take the service down hard or make it unusable for people who depend on it.

1.6

6.0

[email protected]

6.1

3.1

MEDIUM

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N Click to expand

Attack vector (AV:N): Could be attacked over the internet or any normal routed network—not just someone sitting at the machine.
Attack complexity (AC:L): Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:N): No account or special rights needed—anonymous or random user is enough.
User interaction (UI:R): A real person has to do something—click, install, enable—otherwise it doesn’t land.
Scope (S:C): Breaking this can reach past the original component and bite other resources—bigger blast radius.
Confidentiality (C:L): Some sensitive info could get out, but not a total data dump.
Integrity (I:L): Attackers could change some data, but it’s limited—not everything goes.
Availability (A:N): Service keeps running; no real outage angle.

2.8

2.7

[email protected]

Affected software / configurations for CVE-2023-3466

Vendor	Product	Version	Raw CPE
citrix	netscaler_application_delivery_controller	>= 12.1, < 12.1-55.297	cpe:2.3:a:citrix:netscaler_application_delivery_controller:::::fips:::*
citrix	netscaler_application_delivery_controller	>= 12.1, < 12.1-55.297	cpe:2.3:a:citrix:netscaler_application_delivery_controller:::::ndcpp:::*
citrix	netscaler_application_delivery_controller	>= 13.0, < 13.0-91.13	cpe:2.3:a:citrix:netscaler_application_delivery_controller:::::-:::*
citrix	netscaler_application_delivery_controller	>= 13.1, < 13.1-37.159	cpe:2.3:a:citrix:netscaler_application_delivery_controller:::::fips:::*
citrix	netscaler_application_delivery_controller	>= 13.1, < 13.1-49.13	cpe:2.3:a:citrix:netscaler_application_delivery_controller:::::-:::*
citrix	netscaler_application_delivery_controller	11.1-65.22	cpe:2.3:a:citrix:netscaler_application_delivery_controller:11.1-65.22::::fips:::
citrix	netscaler_gateway	>= 13.0, < 13.0-91.13	cpe:2.3:a:citrix:netscaler_gateway::::::::
citrix	netscaler_gateway	>= 13.1, < 13.1-49.13	cpe:2.3:a:citrix:netscaler_gateway::::::::

References for CVE-2023-3466

URL	Tags
https://support.citrix.com/article/CTX561482/citrix-adc-and-citrix-gateway-security-bulletin-for-cve20233519-cve20233466-cve20233467	Vendor Advisory

URL

CVE-2023-3466

Exploit prediction scoring system (EPSS) score for CVE-2023-3466

Common vulnerability scoring system (CVSS) metrics for CVE-2023-3466

Weakness enumeration for CVE-2023-3466

Affected software / configurations for CVE-2023-3466

References for CVE-2023-3466