What’s Vulnerable › Vulnerabilities

CVE-2020-11536

• Severity: critical (CVSS 9.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 2.6% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2020-04-15 · updated 2026-06-17
• Weakness: CWE-20

Description

An issue was discovered in ONLYOFFICE Document Server 5.5.0. An attacker can craft a malicious .docx file, and exploit the unzip function to rewrite a binary and remotely execute code on a victim's server.

Affected products

• ONLYOFFICE Document Server: 5.5.0

References

• https://gist.github.com/andrewaeva/beb92d3d2f1c5672dbda5050e323f6a0
• https://github.com/ONLYOFFICE/DocumentServer/blob/master/CHANGELOG.md#551
• https://gist.github.com/andrewaeva/beb92d3d2f1c5672dbda5050e323f6a0
• https://github.com/ONLYOFFICE/DocumentServer/blob/master/CHANGELOG.md#551

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