CVE-2020-8193

MEDIUM

6.5

CVSS Score

Published: July 10, 2020 at 03:38 PM UTC

Updated: June 17, 2026 at 03:26 AM UTC

11 products affected across 1 vendorNetscaler Gateway FirmwareApplication Delivery Controller FirmwareGateway Firmware

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Severity

MEDIUM6.5

Exploitation

CISA KEV

Exploit prediction

EPSS 88%

SSVC

Active

Actively Exploited

CISA Known Exploited Vulnerabilities (KEV) Catalog

EPSS Score88.3%

EPSS (Exploit Prediction Scoring System) estimates a 88.3% chance this CVE is exploited in the wild within the next 30 days — higher than 100% of all CVEs. It complements CVSS: a high EPSS on a mid-severity CVE can still be urgent.

Citrix ADC, Citrix Gateway, and multiple Citrix SD-WAN WANOP appliance models contain an authorization bypass vulnerability that may allow unauthenticated access to certain URL endpoints. The attacker must have access to the NetScaler IP (NSIP) in order to perform exploitation.

Required Action

Apply updates per vendor instructions.

Ransomware Use

Unknown

Added to KEV

Nov 3, 2021

Remediation Due

May 3, 2022

1637 days overdue

Notes

https://nvd.nist.gov/vuln/detail/CVE-2020-8193

Description

Improper access control in Citrix ADC and Citrix Gateway versions before 13.0-58.30, 12.1-57.18, 12.0-63.21, 11.1-64.14 and 10.5-70.18 and Citrix SDWAN WAN-OP versions before 11.1.1a, 11.0.3d and 10.2.7 allows unauthenticated access to certain URL endpoints.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Application Delivery Controller Firmware · Citrix

95%

10.5 ≤ v < 10.5-70.1811.1 ≤ v < 11.1-64.1412.0 ≤ v < 12.0-63.2112.1 ≤ v < 12.1-57.1813.0 ≤ v < 13.0-58.30

Affected range stops below 10.5-70.18, so it looks safe — our inference, not a vendor statement

Affected range stops below 11.1-64.14, so it looks safe — our inference, not a vendor statement

Affected range stops below 12.0-63.21, so it looks safe — our inference, not a vendor statement

Affected range stops below 12.1-57.18, so it looks safe — our inference, not a vendor statement

Affected range stops below 13.0-58.30, so it looks safe — our inference, not a vendor statement

Gateway Firmware · Citrix

95%

13.0 ≤ v < 13.0-58.30

Affected range stops below 13.0-58.30, so it looks safe — our inference, not a vendor statement

Netscaler Gateway Firmware · Citrix

95%

10.5 ≤ v < 10.5-70.1811.1 ≤ v < 11.1-64.1412.0 ≤ v < 12.0-63.2112.1 ≤ v < 12.1-57.18

Affected range stops below 10.5-70.18, so it looks safe — our inference, not a vendor statement

Affected range stops below 11.1-64.14, so it looks safe — our inference, not a vendor statement

Affected range stops below 12.0-63.21, so it looks safe — our inference, not a vendor statement

Affected range stops below 12.1-57.18, so it looks safe — our inference, not a vendor statement

Sd WAN Wanop · Citrix

95%

10.2 ≤ v < 10.2.711.0 ≤ v < 11.0.3d11.1 ≤ v < 11.1.1aCitrix ADC and Citrix Gateway 13.0-58.30, 12.1-57.18, 12.0-63.21, 11.1-64.14 and 10.5-70.18 and Citrix SDWAN WAN-OP 11.1.1a, 11.0.3d and 10.2.7

Affected range stops below 10.2.7, so it looks safe — our inference, not a vendor statement

Affected range stops below 11.0.3d, so it looks safe — our inference, not a vendor statement

Affected range stops below 11.1.1a, so it looks safe — our inference, not a vendor statement

citrix-4000-wo (environment) · citrix-4100-wo (environment) · citrix-5000-wo (environment) · citrix-5100-wo (environment)

Application Delivery Controller · Citrix

60%

Citrix ADC and Citrix Gateway 13.0-58.30, 12.1-57.18, 12.0-63.21, 11.1-64.14 and 10.5-70.18 and Citrix SDWAN WAN-OP 11.1.1a, 11.0.3d and 10.2.7

Gateway · Citrix

60%

Citrix ADC and Citrix Gateway 13.0-58.30, 12.1-57.18, 12.0-63.21, 11.1-64.14 and 10.5-70.18 and Citrix SDWAN WAN-OP 11.1.1a, 11.0.3d and 10.2.7

4000-Wo · Citrixdevice

80%

All versions

4100-Wo · Citrixdevice

80%

All versions

5000-Wo · Citrixdevice

80%

All versions

5100-Wo · Citrixdevice

80%

All versions

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

Patch and advisory references

https://support.citrix.com/article/CTX276688

References (3)

x_refsource_MISCExploitThird Party AdvisoryVDB Entry

Source: [email protected]

http://packetstormsecurity.com/files/160047/Citrix-ADC-NetScaler-Local-File-Inclusion.html

x_refsource_MISCVendor Advisory

Source: [email protected]

https://support.citrix.com/article/CTX276688

US Government Resource

Source: 134c704f-9b21-4f2e-91b3-4a467353bcc0

https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2020-8193

SSVC — Action Prioritization

SSVCActiveAutomatablePartial impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

6.5MEDIUMCISA-ADP

Attack Vector: NETWORK
Complexity: LOW
Privileges: NONE
User Interaction: NONE
Scope: UNCHANGED
Confidentiality: LOW
Integrity: LOW
Availability: NONE

Vector?

Quick Info

StatusANALYZED

CWE

CWE-284CWE-287

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