PatchTheCVECVE-2022-27507: Authenticated denial of service
38
Routine
MEDIUM 6.5UPGRADEUPGRADE
CVE-2022-27507 is a medium-severity flaw (CVSS 6.5) affecting gateway, application delivery controller. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.
Authenticated denial of service
Why this priority
- No elevated risk signals yet
A fixed release or distro patch exists.
Risk facts
| CVSS score | 6.5 (Medium) |
| Attack vector | Network (remote) |
| Attack complexity | Low |
| Privileges needed | Low |
| User interaction | None |
| EPSS exploit chance | 1.0% (top 38%) |
| CISA exploited list | No |
| Weakness | CWE-400 |
| Published | 2023-01-26 |
| 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
- Published CVE record published
- Updated Record last modified
citrix gateway UPGRADE
Affected: >= 12.1 and < 12.1-64.17 · >= 13.0 and < 13.0-85.19 · >= 13.1 and < 13.1-21.50
Fixed in: 12.1-64.17, 13.0-85.19, 13.1-21.50
Safe to downgrade to: a release before 12.1
1. Check installed version
apt-cache policy gateway || rpm -q gateway || gateway --version
2. UPGRADE to 12.1-64.17 (Debian / Ubuntu)
sudo apt update && sudo apt install --only-upgrade gateway
2. UPGRADE (RHEL / Amazon Linux / Fedora)
sudo dnf upgrade gateway
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 12.1 (Debian / Ubuntu)
apt-cache madison gateway
sudo apt install gateway=<VERSION_BEFORE_12.1>
sudo apt-mark hold gateway
3. If no update is available yet, DOWNGRADE (RHEL / Amazon Linux / Fedora)
dnf --showduplicates list gateway
sudo dnf downgrade gateway-<VERSION_BEFORE_12.1>
sudo dnf versionlock add gateway
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.
citrix application delivery controller UPGRADE
Affected: >= 12.1 and < 12.1-55.278 · >= 12.1 and < 12.1-64.17 · >= 13.0 and < 13.0-85.19 · >= 13.1 and < 13.1-21.50
Fixed in: 12.1-55.278, 12.1-64.17, 13.0-85.19, 13.1-21.50
Safe to downgrade to: a release before 12.1
1. Check installed version
apt-cache policy application-delivery-controller || rpm -q application-delivery-controller || application-delivery-controller --version
2. UPGRADE to 12.1-55.278 (Debian / Ubuntu)
sudo apt update && sudo apt install --only-upgrade application-delivery-controller
2. UPGRADE (RHEL / Amazon Linux / Fedora)
sudo dnf upgrade application-delivery-controller
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 12.1 (Debian / Ubuntu)
apt-cache madison application-delivery-controller
sudo apt install application-delivery-controller=<VERSION_BEFORE_12.1>
sudo apt-mark hold application-delivery-controller
3. If no update is available yet, DOWNGRADE (RHEL / Amazon Linux / Fedora)
dnf --showduplicates list application-delivery-controller
sudo dnf downgrade application-delivery-controller-<VERSION_BEFORE_12.1>
sudo dnf versionlock add application-delivery-controller
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.
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-2022-27507?
gateway: upgrade to 12.1-64.17, 13.0-85.19, 13.1-21.50; application delivery controller: upgrade to 12.1-55.278, 12.1-64.17, 13.0-85.19, 13.1-21.50. Exact commands for each OS are on this page.
Is CVE-2022-27507 being exploited?
CVE-2022-27507 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-2022-27507 affect?
CVE-2022-27507 affects gateway, application delivery controller. Severity is medium (CVSS 6.5). Authenticated denial of service
How urgent is CVE-2022-27507?
Priority 38/100. No elevated risk signals yet.
Software pages
Related CVEs
- CVE-2026-22771 HIGH 8.8 UPGRADE Envoy Gateway is an open source project for managing Envoy Proxy as a standalone or Kubernetes-based applicati
- CVE-2025-24030 HIGH 7.1 UPGRADE Envoy Gateway is an open source project for managing Envoy Proxy as a standalone or Kubernetes-based applicati
- CVE-2023-24488 MEDIUM 6.1 UPGRADE UPGRADE Cross site scripting vulnerability in Citrix ADC and Citrix Gateway in allows and attacker to perform cross s
- CVE-2023-24487 MEDIUM 6.3 UPGRADE UPGRADE Arbitrary file read in Citrix ADC and Citrix Gateway
- CVE-2022-38368 HIGH 8.8 UPGRADE An issue was discovered in Aviatrix Gateway before 6.6.5712 and 6.7.x before 6.7.1376