Security readout for executives and security teams
CVE-2019-19781 is a critical Citrix ADC and Gateway flaw that can expose remote access infrastructure to unauthenticated compromise. Because CISA lists it as known exploited and public exploit references exist, any remaining affected Citrix appliance should be treated as an urgent business risk. Highest exposure is internet-facing Citrix ADC or Gateway appliances used for remote access, VPN, load balancing, or application delivery. The bundle does not provide precise CPEs or asset-discovery fingerprints, so inventory confirmation is required. Treat as immediate priority for any exposed Citrix remote access infrastructure. This is an older vulnerability, but KEV status means exploitation has been observed, and legacy appliances often remain forgotten at the network edge. Mitigation focus: Identify all Citrix ADC and Gateway assets, especially internet-facing systems.; Apply Citrix guidance from CTX267027 and current vendor-supported fixed builds.; If immediate patching is impossible, follow Citrix-published mitigations only..
Michael Williams reviewed this cited source version on .
Conservative CVE-to-ATT&CK context
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ATT&CK lookup starting points
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CWE-22: File access and web shell behavior lookup
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Open ATT&CK lookupFile access behavior lookup
The CVE wording references file access or upload behavior, so file telemetry and web shell review may help. This is a Glexia inferred lookup path, not an official MITRE, ATT&CK, or CVE Program mapping.
Open ATT&CK lookupCVE-2019-19781 mapping review
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Open ATT&CK lookup- Severity
- Critical
- CVSS
- 9.8 (3.1)
- Known Exploited
- Yes
- Published
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CNA and ADP enrichment extracted from CVE v5
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CISA KEV status
CVSS vector scores
1 official scoreWe collect every scored CVSS vector available in the official CNA and ADP containers. When more than one version is present, the table keeps the source vectors side by side instead of collapsing them into the highest score.
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H3.95.9Primary CVE scoreVulnerability scoring details
Base CVSS 3.1 score
9.8CriticalVector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Source materials
- CVE List V5 sourceCVE List V5
- https://support.citrix.com/article/CTX267027CVE reference · x_refsource_CONFIRM
- VU#619785CVE reference · third-party-advisory, x_refsource_CERT-VN
- https://twitter.com/bad_packets/status/1215431625766424576CVE reference · x_refsource_MISC
- https://badpackets.net/over-25000-citrix-netscaler-endpoints-vulnerable-to-cve-2019-19781/CVE reference · x_refsource_MISC
- https://forms.gle/eDf3DXZAv96oosfj6CVE reference · x_refsource_MISC
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2019-19781CVE reference · government-resource
Products and packages named in the record
CWE details
CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.
Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')
Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal') represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.