First published 10/8/2026, 6:12:15 PM UTC · Last updated 10/8/2026, 6:12:15 PM UTC

CVE-2021-3199: ONLYOFFICE Docs Server Path Traversal Vulnerability

The source reports a path traversal vulnerability in ONLYOFFICE Docs Server that could allow remote code execution. It calls for applying mitigations in accordance with vendor instructions and applicable CISA guidance.

Why it matters

The reported vulnerability could allow remote code execution, and the source recommends mitigation or discontinuing use if mitigations are unavailable.

Categories: technology

Generated scores

Scores are based on the cited reporting and use a 1–10 scale. Read the methodology.

Confidence: 5/10How certain the assessment is based on the clarity and evidence in the cited reporting.
Geographic reach: 1/10How widely the event reaches, from a local area (1) to worldwide impact (10).
Global importance: 2/10The event's broader significance, from limited importance (1) to major global importance (10).
Impact magnitude: 3/10The scale or severity of the real-world impact, from minor (1) to extreme (10).
Positivity: 3/10How harmful or beneficial the event is, from strongly harmful (1) to strongly positive (10).
Urgency: 4/10How time-sensitive the event is, from low urgency (1) to immediate attention needed (10).

Sources

CVE-2021-3199: ONLYOFFICE Docs Server Path Traversal Vulnerability

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