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CVE-2019-19781 CISA KEV critical CVSS 9.8

[KEV] Path Traversal in Citrix Application Delivery Controller (ADC), Gateway, and SD-WAN WANOP Appliance (CVE-2019-19781)

Summary

Path traversal in Citrix Application Delivery Controller (ADC), Gateway, and SD-WAN WANOP Appliance (CVE-2019-19781). Successful exploitation can lead to full system takeover. Listed in CISA KEV — actively exploited.

Original description

The description as published by the source.

Citrix ADC, Citrix Gateway, and multiple Citrix SD-WAN WANOP appliance models contain an unspecified vulnerability that could allow an unauthenticated attacker to perform code execution.

Source: CISA Known Exploited Vulnerabilities NVD CISA KEV

Auto-generated summary

Assembled by SecPulse from the source data (CVSS, CWE, affected versions) using templates — no AI involved. Check the original description and references below for exact details.

A vulnerability tracked as CVE-2019-19781 has been found in Citrix Application Delivery Controller (ADC), Gateway, and SD-WAN WANOP Appliance.
Successful exploitation can lead to full system takeover. CVSS score: 9.8/10.
Note: CISA has officially confirmed this is actively exploited in the wild. Treat it with elevated urgency.
What to do: apply the vendor's official patched release.
If unsure, ask your IT team or search "Citrix Application Delivery Controller (ADC), Gateway, and SD-WAN WANOP Appliance CVE-2019-19781" on the vendor's site.

CVE-2019-19781 (Citrix Application Delivery Controller (ADC), Gateway, and SD-WAN WANOP Appliance) — CWE-22 / CVSS v3 9.8
Attack vector: remote (network-reachable) / unauthenticated / no user interaction
Listed in CISA KEV — actively exploited, treat as top priority.
Plan: 1) Audit SBOM/dependencies, 2) Stage→prod upgrade, 3) Add WAF/proxy monitoring on affected endpoints, 4) Hunt IOCs in logs.
Refs: see the GHSA / vendor advisory / patched release linked on this page.

❓ What is the problem

Path traversal (CWE-22) exists in Citrix Application Delivery Controller (ADC), Gateway, and SD-WAN WANOP Appliance.

📍 Affected scope

Check the vendor advisory for the affected versions of Citrix Application Delivery Controller (ADC), Gateway, and SD-WAN WANOP Appliance.

🔥 Severity

Severity: Critical (CVSS 9.8/10). Successful exploitation can lead to full system takeover. Listed in CISA KEV — actively exploited in the wild, treat as top priority.

🔧 How to fix

Update to the patched release per vendor advisory.

🛡️ Workaround

Until the patch is applied: disable the affected feature, apply WAF rules, or restrict access via network ACLs.

🔍 Detection

Search webserver/proxy logs for unusual request patterns matching this CVE's known IOCs. Audit SBOM/dependencies to find affected services.

Response actions

Concrete steps and command examples for SOC/SRE teams to execute in order

  1. 1
    Identify exposure identify 
    Audit SBOM/dependencies for affected components.

    資産台帳・SBOM・依存マニフェストで Citrix Application Delivery Controller (ADC), Gateway, and SD-WAN WANOP Appliance を使っているサービスとバージョンを洗い出す。

  2. 2
    Consider incident declaration escalate 
    Notify SOC / on-call

    CISA KEV登録済 = 実環境で悪用が観測されている。侵入の兆候があればインシデント対応宣言、無くてもパッチ適用までWAF強化を最優先で。

  3. 3
    Post-deployment verification verify 
    Confirm patched version is live in production

    パッチ適用後、ステージングで PoC または同等の悪用パターンを再現して脆弱性が閉じたことを確認。本番ではアクセスログ・WAF でアラート再発が無いか継続監視。

References

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