Signature update version 73

Last published : Sep 22, 2026
New signatures rules are generated for the vulnerabilities identified in the week 2021-12-13. You can download and configure these signature rules to protect your appliance from security vulnerable attacks.
Related information

Signature version

Signatures are compatible with the following software versions of Citrix Application Delivery Controller (ADC) 11.1, 12.0, 12.1, 13.0 and 13.1.
NetScaler version 12.0 has reached end of life (EOL). For more information, see release life cycle page.
Note:
Enabling Post body and Response body signature rules might affect NetScaler CPU.

Common Vulnerability Entry (CVE) insight

Following is a list of signature rules, CVE IDs, and its description that are updated.
Note:
The below signature rules (999077, 999078, 999079, 999080) addresses both CVEs (CVE-2021-44228, and CVE-2021-45046).
Signature rule CVE ID Description
999077 CVE-2021-44228, CVE-2021-45046 WEB-MISC Apache Log4j - Remote Code Execution Vulnerability via FORM (CVE-2021-44228, CVE-2021-45046)
999078 CVE-2021-44228, CVE-2021-45046 WEB-MISC Apache Log4j - Remote Code Execution Vulnerability via BODY (CVE-2021-44228, CVE-2021-45046)
999079 CVE-2021-44228, CVE-2021-45046 WEB-MISC Apache Log4j - Remote Code Execution Vulnerability via HEADER (CVE-2021-44228, CVE-2021-45046)
999080 CVE-2021-44228, CVE-2021-45046 WEB-MISC Apache Log4j - Remote Code Execution Vulnerability via URL (CVE-2021-44228, CVE-2021-45046)