Not CUI Compliant
4 NIST 800-171 gaps detected. Not FedRAMP authorized. Using this tool for CUI creates compliance violations under NIST 800-171 and DFARS 252.204-7012.
ONLYOFFICE
by Ascensio
FedRAMP Status
Not FedRAMP Authorized
Impact Level
N/A
Category
Office Suite
Overview
ONLYOFFICE is an open-source office suite with cloud and self-hosted options. It is not FedRAMP authorized and its cloud service should not be used for government CUI documents.
CUI Risk Assessment
Not FedRAMP authorized. Using this tool for CUI creates compliance violations under NIST 800-171 and DFARS 252.204-7012.
Using ONLYOFFICE in a Defense Contractor Environment
ONLYOFFICE presents significant compliance challenges for defense contractors handling CUI in CMMC Level 2 environments. This office suite typically processes technical drawings, engineering specifications, financial data, and contractor employee PII across DoD contracts. When deployed within a CMMC authorization boundary, ONLYOFFICE's cloud service creates an immediate boundary violation as CUI would transit to non-FedRAMP authorized infrastructure. The self-hosted deployment option allows boundary control but requires extensive configuration hardening. Compensating controls for on-premises deployment must include network segmentation, enhanced logging, encrypted storage, and strict access controls aligned with NIST 800-171 requirements. DCMA assessors consistently flag unauthorized cloud office suites during CMMC readiness assessments, specifically examining data flow diagrams and network architecture documentation. Recent DIBCAC reviews have identified ONLYOFFICE cloud usage as a critical finding leading to contract action deferrals. The open-source nature creates additional assessment complexity around vulnerability management and patch deployment timelines, requiring documented security configuration baselines and change control procedures that many contractors struggle to maintain effectively.
Deployment & Architecture
Deployment Model: Self-hosted (open-source)
ONLYOFFICE lacks FedRAMP authorization. Using this tool for CUI processing violates DFARS 252.204-7012 requirements. Defense contractors must evaluate FedRAMP-authorized alternatives or implement and document compensating controls in their POA&M.
Migration Guidance
Defense contractors using ONLYOFFICE cloud services must immediately migrate to compliant alternatives to avoid DFARS 252.204-7012 violations. Migration timeline requires 8-12 weeks across three phases: assessment and planning (2-3 weeks), data migration and testing (4-6 weeks), and user training with compliance validation (2-3 weeks). CUI data export from ONLYOFFICE cloud requires encrypted transit channels and temporary storage on CMMC-compliant infrastructure during migration. Document format compatibility testing is critical given ONLYOFFICE's OpenDocument focus versus Microsoft Office prevalence in DoD contracts. User training must address new collaboration workflows and security procedures, requiring approximately 4-8 hours per user depending on role complexity. Compliance documentation updates include removing ONLYOFFICE from the System Security Plan, updating authorization boundary diagrams to exclude cloud connections, and creating POA&M entries for migration milestones. Recommended alternatives include Microsoft 365 GCC High ($22-35/user/month), Google Workspace for Government ($25/user/month), or on-premises Microsoft Office with SharePoint Server. Total migration costs typically range $15,000-45,000 for organizations with 50-200 users, including licensing, implementation services, and compliance documentation updates.
Migration Checklist
- 1ISSO must immediately assess current ONLYOFFICE usage and document all CUI data locations within 48 hours per DFARS 252.204-7012 incident reporting requirements.
- 2Contracts officer must notify DCMA of potential CUI exposure and file initial incident report referencing specific contract clauses affected.
- 3Sysadmin must block all network access to ONLYOFFICE cloud services through firewall rules and proxy configurations within 24 hours.
- 4Legal team must review all contracts using ONLYOFFICE cloud services and identify potential DFARS 252.204-7021 disclosure violations requiring contractor notification.
- 5ISSO must update the System Security Plan to remove ONLYOFFICE cloud services from the authorization boundary diagram and technology inventory.
- 6Sysadmin must export all CUI documents from ONLYOFFICE cloud using encrypted channels and verify data integrity through hash validation.
- 7ISSO must create POA&M entries for NIST 800-171 controls 3.1.1, 3.1.2, 3.13.1, and 3.13.8 with migration milestones and completion dates.
- 8Contracts officer must procure FedRAMP authorized office suite alternative and validate vendor compliance documentation before deployment.
- 9Sysadmin must configure new office suite with appropriate security settings including encryption at rest, multi-factor authentication, and audit logging per NIST 800-171 requirements.
- 10ISSO must conduct final compliance validation and update authorization boundary documentation before removing POA&M entries and notifying DCMA of remediation completion.
Compliance Cross-References
ONLYOFFICE cloud usage creates cascading compliance failures across multiple NIST 800-171 control families. Access Control (AC) violations occur through inadequate system boundaries and unauthorized external connections, triggering findings in controls 3.1.1 and 3.1.2. System and Communications Protection (SC) failures manifest through uncontrolled data transmission and inadequate boundary protection per control 3.13.1. Audit and Accountability (AU) deficiencies arise from inability to monitor CUI access in third-party cloud environments under control 3.13.8. This non-compliance directly violates DFARS 252.204-7012 adequate security requirements and may trigger DFARS 252.204-7021 disclosure obligations if CUI exposure occurred. For CMMC Level 2 assessments, ONLYOFFICE cloud usage affects System Architecture (SC.L2-3.13.1) and Data Security (SC.L2-3.13.8) domains, creating automatic practice implementation failures. The violation chain extends to FedRAMP requirements as CUI processing outside authorized boundaries violates federal cloud security mandates, potentially impacting future contract awards requiring FedRAMP compliance demonstration.
NIST 800-171 Violations
Using ONLYOFFICE for CUI without FedRAMP authorization may violate these NIST 800-171 controls:
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FedRAMP Compliant Alternatives
Frequently Asked Questions
Is ONLYOFFICE FedRAMP authorized?
No. ONLYOFFICE does not hold FedRAMP authorization at any impact level.
Can I use ONLYOFFICE with CUI?
No. The ONLYOFFICE cloud service is not authorized for CUI. Self-hosted deployments on FedRAMP infrastructure may be considered with proper risk documentation.
What is a compliant alternative to ONLYOFFICE?
Microsoft 365 GCC High and Google Docs Government are FedRAMP authorized office suites for CUI.
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