CVE-2022-27511: Corruption of the system by a remote, unauthenticated user

This week

HIGH 8.1REMOTEUPGRADE

CVE-2022-27511 is a high-severity flaw (CVSS 8.1) affecting application delivery management. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Corruption of the system by a remote, unauthenticated user. The impact of this can include the reset of the administrator password at the next device reboot, allowing an attacker with ssh access to connect with the default administrator credentials after the device has rebooted.

Why this priority

High severity
EPSS top 4%: very likely to be exploited
Remotely exploitable, no login, no user action

A fixed release or distro patch exists.

Risk facts

CVSS score	8.1 (High)
Attack vector	Network (remote)
Attack complexity	High
Privileges needed	None
User interaction	None
EPSS exploit chance	12.7% (top 4%)
CISA exploited list	No
Weakness	CWE-284
Published	2022-06-16
Last modified	2026-06-17

Publisher (CNA): Citrix Systems, Inc. · Vendor: citrix

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

Am I affected?

Timeline

2022-06-16 19:15 UTCPublished CVE record published
2026-06-17 04:37 UTCUpdated Record last modified

citrix application delivery management UPGRADE

Affected: < 13.0-85.19 · >= 13.1 and < 13.1-21.53

Fixed in: 13.0-85.19, 13.1-21.53

Safe to downgrade to: a release before 13.1

1. Check installed version

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

2. UPGRADE to 13.0-85.19 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade application-delivery-management

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade application-delivery-management

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

3. If no update is available yet, DOWNGRADE to a release before 13.1 (Debian / Ubuntu)

apt-cache madison application-delivery-management sudo apt install application-delivery-management=<VERSION_BEFORE_13.1> sudo apt-mark hold application-delivery-management

3. If no update is available yet, DOWNGRADE (RHEL / Amazon Linux / Fedora)

dnf --showduplicates list application-delivery-management sudo dnf downgrade application-delivery-management-<VERSION_BEFORE_13.1> 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-2022-27511?

application delivery management: upgrade to 13.0-85.19, 13.1-21.53. Exact commands for each OS are on this page.

Is CVE-2022-27511 being exploited?

CVE-2022-27511 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-2022-27511 affect?

CVE-2022-27511 affects application delivery management. Severity is high (CVSS 8.1). Corruption of the system by a remote, unauthenticated user. The impact of this can include the reset of the administrator password at the next device reboot, allowing an attacker with ssh access to connect with the default administrator cre

How urgent is CVE-2022-27511?

Priority 57/100. High severity; EPSS top 4%: very likely to be exploited; Remotely exploitable, no login, no user action

Software pages

Citrix vulnerabilities

Related CVEs

CVE-2022-27512 MEDIUM 5.3 UPGRADE Temporary disruption of the ADM license service
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.
CVE-2019-17366 HIGH 8.8 DOWNGRADE Citrix Application Delivery Management (ADM) 12.1 before build 54.13 has Incorrect Access Control.

References

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