Critical severity · published Nov 8, 2022
CVE-2022-27516
User login brute force protection functionality bypass
9.8
CVSS
0.7%
EPSS
No
On KEV
Description
User login brute force protection functionality bypass
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
High
Integrity
High
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.7% · higher than 52% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
NA
NetScaler ADC · Citrix
12.1 before 12.1-65.21; 13.0 before 13.0-88.12; 13.1 before 13.1-33.47 · source: NVD
AD
Application Delivery Controller Firmware · Citrix
12.1 before 12.1-65.21; 13.0 before 13.0-88.12; 13.1 before 13.1-33.47; 12.1 before 12.1-55.289; 12.1 before 12.1-55.289 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2022-27516
CVE.org
https://www.cve.org/CVERecord?id=CVE-2022-27516
Vendor Advisory
https://support.citrix.com/article/CTX463706/citrix-gateway-and-citrix-adc-security-bulletin-for-cve202227510-cve202227513-and-cve202227516
More from NetScaler ADC
9.8
CVE-2026-88771
A remote code execution vulnerability exists due to improper input validation, which can allow an unauthenticated attacker to execute arbitrary commands
9.8
CVE-2026-19490
NetScaler ADC and NetScaler Gateway Security Bulletin for CVE-2026-19490
9.8
CVE-2026-8452
Memory overflow vulnerability leading to unpredictable or erroneous behavior and Denial of Service
9.8
CVE-2026-3055
Insufficient input validation leading to memory overread
9.8
CVE-2025-7775
Memory overflow vulnerability leading to Remote Code Execution and/or Denial of Service