Security readout for executives and security teams
Plain-English summary
CVE-2021-20768 lets an authenticated user in affected Cybozu Garoon versions delete Scheduler and MultiReport data without having the required privileges. The main business risk is unauthorized loss or disruption of scheduling and report records, not unauthenticated takeover.
Executive priority
Prioritize remediation for internet-accessible or broadly used Garoon deployments because authorized users could remove operational data beyond their permissions. Treat as medium urgency unless the affected modules support critical business processes.
Technical view
The vulnerability is an operational restrictions bypass in Cybozu Garoon Scheduler and MultiReport. A remote authenticated attacker can delete those modules' data without appropriate privilege. Public source data identifies affected Garoon versions 4.0.0 through 5.0.2; no CVSS, CWE, or exploit details are provided.
Likely exposure
Exposure is limited to organizations running Cybozu Garoon 4.0.0 to 5.0.2. Risk is higher where Garoon is internet-accessible or has many low-privilege authenticated users.
Exploitation context
The sources do not report active exploitation, and the CVE is not listed as KEV. Exploitation requires a remote authenticated user, but the user does not need the appropriate delete privilege for Scheduler or MultiReport data.
Researcher notes
Evidence is sparse: the public CVE description gives the affected range and impact but no CVSS vector, CWE, root cause, fixed release, or exploit status. Avoid assuming broader Garoon compromise beyond unauthorized deletion in Scheduler and MultiReport.
Mitigation direction
- Inventory Cybozu Garoon deployments and confirm exact versions.
- Check Cybozu and JVN advisories for supported fixes or upgrade guidance.
- Restrict Garoon access to trusted networks where practical.
- Review account provisioning and remove unnecessary authenticated users.
- Ensure Scheduler and MultiReport data backups are current.
- Monitor for unexpected deletes in affected modules.
Validation and detection
- Confirm whether any deployment runs Garoon 4.0.0 through 5.0.2.
- Identify whether Scheduler or MultiReport is enabled and business-critical.
- Review audit logs for unexpected Scheduler or MultiReport deletions.
- Validate role-based delete permissions in a controlled test environment.
- Confirm vendor advisory status before marking systems remediated.
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
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CVE-2021-20768 mapping review
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Open ATT&CK lookup- Severity
- Unknown
- CVSS
- Not scored
- Known Exploited
- No
- Published
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 and timeline data
No CVSS vectors or timeline events were available in the normalized CVE source material.
Source materials
- CVE List V5 sourceCVE List V5
- https://cs.cybozu.co.jp/2021/007206.htmlCVE reference · x_refsource_MISC
- https://jvn.jp/en/jp/JVN54794245/index.htmlCVE 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.