CVE-2026-21840 json
HCL BigFix Platform is affected by a user enumeration vulnerability
published 2026-07-14 3 mo ago modified 2026-10-24 15 d ago also EUVD-2026-44531
- cvss
- 3.1
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.2%
- EPSS 0.2% chance of exploitation in 30 days, percentile 15%
- public exploits
- 0
- none known
Summary
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.
CISA SSVC
- Exploitation
- none
- Automatable
- no
- Technical impact
- partial
- Assessed
- 3 mo ago
Exploit prediction
0.24% chance of exploitation in the next 30 days, higher than 15% of all scored CVEs (FIRST EPSS, 2026-11-08).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 3.1 | 3.1 | CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:N/A:N |
Affected products
- HCLSoftware HCL BigFix Platform
Classification
- Weakness
-
- CWE-208 Observable Timing Discrepancy
References
Sources
- CVE List CVE-2026-21840
- NVD CVE-2026-21840
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