CVE-2026-21806

CVE-2026-21806

Low · published September 18, 2026

CVSS v3.1
3.1
EPSS
0%
Percentile
9.2
In the wild
Unconfirmed
What it is

HCL BigFix Service Management is affected by an Administrative Session Concurrency vulnerability. The application allows multiple simultaneous authenticated sessions for the same administrative account, which could enable an unauthorized attacker to predict or hijack valid session identifiers. Successful exploitation allows an attacker to compromise affected administrative sessions and execute actions with full privileged user permissions.

The record
Technical detail
CVSS v3.1
3.1 · LOW
Vector
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:N/A:N
CVSS v4.0
Not supplied
EPSS
0.00199 · 9.2th percentile
Published
2026-09-18T16:17Z
Affected products (1)
ProductVersionsFixed in
hcltech/bigfix_service_managementall versions—
References (1)
EPSS history
Timeline
  • 20 SEP 03:22Z
    EPSS moved — → 0%
    epss
  • 18 SEP 11:12Z
    HCL BigFix Service Management was affected with Admin Session Concurrency vulnerability (CVE-2026-21806)
    cvelistv5