Critical severity · published Sep 18, 2026
CVE-2026-56590
HCL BigFix Service Management is affected by multiple security vulnerabilities.
9.8
CVSS
0.2%
EPSS
No
On KEV
Description
HCL BigFix Service Management is affected by an Unrestricted File Upload vulnerability due to improper file validation controls, which could allow an unauthenticated attacker to upload and execute malicious payloads, resulting in a complete server compromise.
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)0.2% · higher than 9% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
HB
HCL BigFix Service Management · HCL Software
v27 · source: vendor
BS
Bigfix Service Management · Hcltech
23; 27 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-56590
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-56590
Vendor Advisory
https://support.hcl-software.com/csm?id=kb_article&sysparm_article=KB0133917
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