Security readout for executives and security teams
Plain-English summary
HCL BigFix Mobile / Modern Client Management 2.0 and 2.1 can expose sensitive information in user-generated Bulk Enroll PPKG files because the data may be unencrypted. The main business risk is disclosure of enrollment-related secrets or configuration data if those files are stored or shared insecurely.
Executive priority
Treat this as a moderate-priority exposure-control issue. It is not reported as actively exploited in the provided sources, but the potential confidentiality impact is high if enrollment package files were broadly accessible.
Technical view
CVE-2021-27783 is a CWE-311 sensitive information exposure issue affecting HCL BigFix Mobile / Modern Client Management versions 2.0 and 2.1. The CVSS 3.1 score is 6.8, with network attack vector, low complexity, low privileges, and user interaction required. Confidentiality impact is high.
Likely exposure
Exposure is likely limited to organizations using HCL BigFix Mobile / Modern Client Management 2.0 or 2.1 and generating Bulk Enroll PPKG files. Risk increases where those files are copied to shared storage, emailed, retained on endpoints, or accessible beyond administrators.
Exploitation context
The provided sources do not indicate active exploitation, and the CVE is not marked as CISA KEV. Exploitation depends on access to vulnerable workflows or generated PPKG files, with user interaction and low privileges reflected in the CVSS vector.
Researcher notes
Evidence is sparse in the source bundle: the core public detail is that user-generated Bulk Enroll PPKG files may expose unencrypted sensitive information. Avoid assuming specific secrets, file contents, fixed versions, or exploitability details beyond the CVE description and CVSS vector.
Mitigation direction
- Review HCL KB0098586 and apply vendor-approved remediation for affected BigFix MCM versions.
- Restrict creation and handling of Bulk Enroll PPKG files to authorized administrators.
- Remove unnecessary copies of generated PPKG files from endpoints and shared locations.
- Apply strong access controls to any retained Bulk Enroll PPKG files.
- Rotate sensitive values if exposed PPKG files were accessible to unauthorized users.
Validation and detection
- Inventory HCL BigFix Mobile / Modern Client Management deployments for versions 2.0 and 2.1.
- Identify systems and users that generated Bulk Enroll PPKG files.
- Review storage locations, permissions, and retention of generated PPKG files.
- Confirm HCL vendor guidance has been reviewed and tracked to closure.
- Document whether any exposed PPKG files require credential or secret rotation.
Public sources used
Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.
Conservative CVE-to-ATT&CK context
These mappings and lookup hints may be relevant to the vulnerability behavior, CWE, affected product, or exposure path. Glexia-inferred context is not an official MITRE, ATT&CK, CWE, or CVE Program mapping.
ATT&CK lookup starting points
Use these exact CWE pages and searches to review the Glexia ATT&CK library from this CVE's weakness and description context.
CWE-311: Exact CWE lookup
Use the exact CWE identifier as the starting point before reviewing related ATT&CK behavior. Open the exact CWE lookup page first, then review the ATT&CK searches from that MITRE weakness context. This is a Glexia lookup hint, not an official ATT&CK mapping.
Open ATT&CK lookupCVE-2021-27783 mapping review
Open the CVE-to-ATT&CK bridge for reviewed, inferred, or future official mappings tied to this CVE.
Open ATT&CK lookup- Severity
- Medium
- CVSS
- 6.8 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:L/A:L
CNA and ADP enrichment extracted from CVE v5
These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.
CVSS vector scores
1 official scoreWe collect every scored CVSS vector available in the official CNA and ADP containers. When more than one version is present, the table keeps the source vectors side by side instead of collapsing them into the highest score.
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:L/A:L2.14.7Primary CVE scoreVulnerability scoring details
Base CVSS 3.1 score
6.8MediumVector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:L/A:L
Source materials
- CVE List V5 sourceCVE List V5
- https://support.hcltechsw.com/csm?id=kb_article&sysparm_article=KB0098586CVE reference · x_refsource_MISC
Products and packages named in the record
CWE details
CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.
Missing Encryption of Sensitive Data
Missing Encryption of Sensitive Data represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.