CVE-2019-17366: Citrix Application Delivery Management (ADM) 12.1 before build 54.13 has Incorrect Access Control.

This month

HIGH 8.8DOWNGRADE

CVE-2019-17366 is a high-severity flaw (CVSS 8.8) affecting application delivery management. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Citrix Application Delivery Management (ADM) 12.1 before build 54.13 has Incorrect Access Control.

Why this priority

High severity

No fix is published yet: follow the downgrade or mitigation steps.

Risk facts

CVSS score	8.8 (High)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	Low
User interaction	None
EPSS exploit chance	1.3% (top 31%)
CISA exploited list	No
Published	2019-10-09
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: citrix

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2019-10-09 22:15 UTCPublished CVE record published
2026-06-17 02:23 UTCUpdated Record last modified

citrix application delivery management DOWNGRADE

Affected: 12.1 build_48.18 · 12.1 build_49.23 · 12.1 build_49.37 · 12.1 build_50.28 · 12.1 build_50.30 · 12.1 build_50.33 · 12.1 build_50.39 · 12.1 build_50.43

Fixed in: no fixed release known

Safe to downgrade to: a release before 12.1

1. Check installed version

apt-cache policy application-delivery-management || rpm -q application-delivery-management || application-delivery-management --version

2. No fixed release: DOWNGRADE to a release before 12.1 (Debian / Ubuntu)

apt-cache madison application-delivery-management sudo apt install application-delivery-management=<VERSION_BEFORE_12.1> sudo apt-mark hold application-delivery-management

2. No fixed release: DOWNGRADE (RHEL / Amazon Linux / Fedora)

dnf --showduplicates list application-delivery-management sudo dnf downgrade application-delivery-management-<VERSION_BEFORE_12.1> sudo dnf versionlock add application-delivery-management

Downgrade risk

Downgrading can break dependent software and may reopen older bugs. Read the distro advisory first and test on a non-production host.

After downgrade

Restart the service, and keep the package held until a fixed release ships.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2019-17366?

application delivery management: downgrade or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2019-17366 being exploited?

CVE-2019-17366 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2019-17366 affect?

CVE-2019-17366 affects application delivery management. Severity is high (CVSS 8.8). Citrix Application Delivery Management (ADM) 12.1 before build 54.13 has Incorrect Access Control.

How urgent is CVE-2019-17366?

Priority 48/100. High severity

Software pages

Citrix vulnerabilities

Related CVEs

CVE-2022-27512 MEDIUM 5.3 UPGRADE Temporary disruption of the ADM license service
CVE-2022-27511 HIGH 8.1 UPGRADE Corruption of the system by a remote, unauthenticated user
CVE-2021-22920 MEDIUM 6.5 DOWNGRADE DOWNGRADE A vulnerability has been discovered in Citrix ADC (formerly known as NetScaler ADC) and Citrix Gateway (former
CVE-2019-9548 CRITICAL 10.0 UPGRADE Citrix Application Delivery Management (ADM) 12.1.x before 12.1.50.33 has Incorrect Access Control.

References

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