CVE-2020-8194 [Medium] | Code Injection in Application Delivery Cont…

CVE-2020-8194 is rated Moderate Risk (64.1/100): CVSS Medium severity, with high exploitation likelihood (EPSS 81.14%, 99th percentile). EPSS ranks this CVE among the most likely to be exploited in the near term. EPSS rose +3.38% 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	2026-03-04	77.76%	81.14%	+3.38%
2	2026-03-01	81.14%	77.76%	-3.38%
3	2026-02-04	—	81.14%	—

Date

Old EPSS score

New EPSS score

Delta (New - Old)

2026-03-04

77.76%

81.14%

+3.38%

2026-03-01

81.14%

77.76%

-3.38%

2026-02-04

—

81.14%

—

Base score	Version	Severity	Vector	Exploitability	Impact	Score source
6.5	3.1	MEDIUM	`CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/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:U) Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems. Confidentiality (C:N) Doesn’t really leak secrets in a meaningful way. Integrity (I:H) They could widely tamper with or forge data—trust in the data is badly hurt. Availability (A:N) Service keeps running; no real outage angle.	2.8	3.6	[email protected]
4.3	2.0	MEDIUM	`AV:N/AC:M/Au:N/C:N/I:P/A:N` Click to expand Access vector (AV:N) Can be exploited remotely over network reachability. Access complexity (AC:M) Exploitation needs some favorable conditions, but not exceptional ones. Authentication (AU:N) No authentication is required. Confidentiality impact (C:N) No confidentiality impact. Integrity impact (I:P) Partial integrity impact. Availability impact (A:N) No availability impact.	8.6	2.9	[email protected]

Base score

Version

Severity

Vector

Exploitability

Impact

Score source

6.5

3.1

MEDIUM

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/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:U): Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:N): Doesn’t really leak secrets in a meaningful way.
Integrity (I:H): They could widely tamper with or forge data—trust in the data is badly hurt.
Availability (A:N): Service keeps running; no real outage angle.

2.8

3.6

[email protected]

4.3

2.0

MEDIUM

AV:N/AC:M/Au:N/C:N/I:P/A:N Click to expand

Access vector (AV:N): Can be exploited remotely over network reachability.
Access complexity (AC:M): Exploitation needs some favorable conditions, but not exceptional ones.
Authentication (AU:N): No authentication is required.
Confidentiality impact (C:N): No confidentiality impact.
Integrity impact (I:P): Partial integrity impact.
Availability impact (A:N): No availability impact.

8.6

2.9

[email protected]

Affected software / configurations for CVE-2020-8194

Vendor	Product	Version	Raw CPE
citrix	application_delivery_controller_firmware	>= 10.5, < 10.5-70.18	cpe:2.3:o:citrix:application_delivery_controller_firmware::::::::
citrix	application_delivery_controller_firmware	>= 11.1, < 11.1-64.14	cpe:2.3:o:citrix:application_delivery_controller_firmware::::::::
citrix	application_delivery_controller_firmware	>= 12.0, < 12.0-63.21	cpe:2.3:o:citrix:application_delivery_controller_firmware::::::::
citrix	application_delivery_controller_firmware	>= 12.1, < 12.1-57.18	cpe:2.3:o:citrix:application_delivery_controller_firmware::::::::
citrix	application_delivery_controller_firmware	>= 13.0, < 13.0-58.30	cpe:2.3:o:citrix:application_delivery_controller_firmware::::::::
citrix	netscaler_gateway_firmware	>= 10.5, < 10.5-70.18	cpe:2.3:o:citrix:netscaler_gateway_firmware::::::::
citrix	netscaler_gateway_firmware	>= 11.1, < 11.1-64.14	cpe:2.3:o:citrix:netscaler_gateway_firmware::::::::
citrix	netscaler_gateway_firmware	>= 12.0, < 12.0-63.21	cpe:2.3:o:citrix:netscaler_gateway_firmware::::::::
citrix	netscaler_gateway_firmware	>= 12.1, < 12.1-57.18	cpe:2.3:o:citrix:netscaler_gateway_firmware::::::::
citrix	gateway_firmware	>= 13.0, < 13.0-58.30	cpe:2.3:o:citrix:gateway_firmware::::::::
citrix	sd-wan_wanop	>= 10.2, < 10.2.7	cpe:2.3:o:citrix:sd-wan_wanop::::::::
citrix	sd-wan_wanop	>= 11.0, < 11.0.3d	cpe:2.3:o:citrix:sd-wan_wanop::::::::
citrix	sd-wan_wanop	>= 11.1, < 11.1.1a	cpe:2.3:o:citrix:sd-wan_wanop::::::::

References for CVE-2020-8194

URL	Tags
https://support.citrix.com/article/CTX276688	Vendor Advisory

URL

CVE-2020-8194

Exploit prediction scoring system (EPSS) score for CVE-2020-8194

Common vulnerability scoring system (CVSS) metrics for CVE-2020-8194

Weakness enumeration for CVE-2020-8194

Affected software / configurations for CVE-2020-8194

References for CVE-2020-8194