CVE-2020-8193: Citrix ADC, Gateway, and SD-WAN WANOP Appliance Authorization Bypass Vulnerability
Actively exploited. At least one CVE in this advisory is listed in the CISA Known Exploited Vulnerabilities catalog — exploitation has been observed in the wild. Treat remediation as 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.
CSIRTS triage
- What
- This vulnerability allows for unauthorized access to certain URL endpoints due to an authorization bypass.
- Who is affected
- Users of Citrix ADC, Citrix Gateway, and multiple Citrix SD-WAN WANOP appliance models.
- Urgency
- Remediation is critical due to active exploitation and the severity of the vulnerability.
- Action
- Apply the latest updates for Citrix products.
AI-assisted analysis generated from the source advisory — verify against the original.
⚡ Watch ADC, Gateway, SD-WAN WANOP Appliance
Get an email when a new ADC, Gateway, SD-WAN WANOP Appliance advisory drops — max one per day, one-click unsubscribe.
Details
Original advisory: https://nvd.nist.gov/vuln/detail/CVE-2020-8193
Exploitation outlook
EPSS (FIRST.org) estimates each CVE’s probability of exploitation in the next 30 days — here is the CSIRTS.com read on those numbers.
- Exploitation confirmedCVE-2020-8193Already exploited in the wild (CISA KEV) — the prediction phase is over. Patch now. Riskier than 99.8% of all EPSS-scored CVEs.
Referenced CVEs
| CVE | CSIRTS overview | External |
|---|---|---|
| CVE-2020-8193 | coverage & exploitation status | NVD · CVE.org |
Recent advisories for Citrix ADC
A cluster of recent advisories against the same product widens the attack surface — attackers routinely chain freshly published CVEs on one product, so review these together.
- high[NEW] [high] Citrix Systems NetScaler (Gateway and ADC): Multiple vulnerabilitiescert-bund · 2026-08-20
- unknownNCSC-2026-0318 [1.00] [M/M] Vulnerabilities resolved in Citrix NetScaler ADC and NetScaler Gatewayncsc-nl · 2026-08-20
- critical2026-010: Critical Vulnerabilities in Citrix NetScaler ADC and NetScaler Gatewaycert-eu · 2026-08-19
- unknownNCSC-2026-0216 [1.01] [M/H] Vulnerabilities Fixed in Citrix Netscaler ADC and Netscaler Gatewayncsc-nl · 2026-08-18
- high[UPDATE] [high] Citrix Systems NetScaler ADC and Gateway: Multiple vulnerabilitiescert-bund · 2026-07-02
- unknownNCSC-2026-0216 [1.00] [M/H] Vulnerabilities fixed in Citrix Netscaler ADC and Netscaler Gatewayncsc-nl · 2026-06-30
More from CISA Known Exploited Vulnerabilities
- criticalCVE-2026-60004: Gitea Code Injection Vulnerability2026-08-25
- criticalCVE-2026-21962: Oracle HTTP Server and Oracle Weblogic Server Proxy Plug-in Improper Access Control Vulnerabil…2026-08-24
- criticalCVE-2026-73570: Zimbra Collaboration Suite (ZCS) OS Command Injection Vulnerability2026-08-21
- criticalCVE-2026-72529: TrueConf Server Missing Authentication for Critical Function Vulnerability2026-08-20
- criticalCVE-2026-72530: TrueConf Server Code Injection Vulnerability2026-08-20