Low severity · published Jul 14, 2026
CVE-2026-21840
HCL BigFix Platform is affected by a user enumeration vulnerability
3.1
CVSS
0.2%
EPSS
No
On KEV
Description
HCL BigFix Platform is affected by a user enumeration vulnerability which might allow an attacker, through careful system control and response time monitoring, to perform some level of user enumeration for the BigFix service.
CVSS vector
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:N/A:N
Attack vector
Network
Complexity
High
Privileges
Low
User interaction
None
Confidentiality
Low
Integrity
None
Availability
None
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.2% · higher than 15% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
HB
HCL BigFix Platform · HCLSoftware
10.0.0 - 10.0.15, 11.0.0 - 11.0.5 · source: vendor