## [悪用確認] CVE-2021-3199: ONLYOFFICE Docs Server Path Traversal Vulnerability

- 種別: advisory
- 重大度: critical
- CVE: CVE-2021-3199
- 公開日時: 2026-10-08T00:00:00.000Z
- 情報源: CISA Known Exploited Vulnerabilities (https://nvd.nist.gov/vuln/detail/CVE-2021-3199)
- パーマリンク: https://vulnpulse.app/items/cisa-kev-cve-2021-3199

ONLYOFFICE Docs
ONLYOFFICE Docs contains a path traversal vulnerability that can occur when JWT is used, via a /.. sequence in an image upload parameter and could allow for remote code execution.
対応: Apply mitigations in accordance with vendor instructions, ensuring compliance with CISA’s BOD 26-04 Prioritizing Security Updates Based on Risk (see URL in Notes) guidance and CISA’s “Forensics Triage Requirements” (see URL in Notes). Follow applicable BOD 26-04 guidance for cloud services or discontinue use of the product if mitigations are unavailable. Stakeholders are responsible for evaluating each asset's internet exposure and ensuring adherence to BOD 26-04 patching guidelines. (期限 2026-10-11)