What’s Vulnerable › Vulnerabilities

CVE-2022-27507: Authenticated denial of service

• Severity: medium (CVSS 6.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 1.0% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2023-01-24 · updated 2026-06-17
• Weakness: CWE-400

Description

Authenticated denial of service

Affected products

• Citrix Application Delivery Controller: from 12.1 before 12.1-64.17; from 13.0 before 13.0-85.19; from 13.1 before 13.1-21.50 — fixed in 12.1-64.17, 13.0-85.19, 13.1-21.50
• Citrix Application Delivery Controller Fips: from 12.1 before 12.1-55.278 — fixed in 12.1-55.278
• Citrix Application Delivery Controller Ndcpp: from 12.1 before 12.1-55.278 — fixed in 12.1-55.278
• NetScaler Gateway: from 12.1 before 12.1-64.17; from 13.0 before 13.0-85.19; from 13.1 before 13.1-21.50 — fixed in 12.1-64.17, 13.0-85.19, 13.1-21.50
• Citirx Citrix Application Delivery Controller (Citrix ADC) and Citrix Gateway: from 13.1 before 13.1-21.50; from 13.0 before 13.0-85.19; from 12.1 before 12.1-64.17; from 12.1 FIPS before 12.1-55.278; from 12.1 NDcPP before 12.1-55.278 — fixed in 13.1-21.50, 13.0-85.19, 12.1-64.17, 12.1-55.278

How to fix

Upgrade to a fixed version: Citrix Application Delivery Controller 12.1-64.17, 13.0-85.19, 13.1-21.50; Citrix Application Delivery Controller Fips 12.1-55.278; Citrix Application Delivery Controller Ndcpp 12.1-55.278; NetScaler Gateway 12.1-64.17, 13.0-85.19, 13.1-21.50; Citirx Citrix Application Delivery Controller (Citrix ADC) and Citrix Gateway 13.1-21.50, 13.0-85.19, 12.1-64.17, 12.1-55.278. Check the vendor advisory for mitigations.

References

• https://support.citrix.com/article/CTX457048/citrix-adc-and-citrix-gateway-security-bulletin-for-cve202227507-and-cve202227508
• https://support.citrix.com/article/CTX457048/citrix-adc-and-citrix-gateway-security-bulletin-for-cve202227507-and-cve202227508

Get alerted when CVE-2022-27507 or the next vulnerability affects your stack