Read the docs
TI-2019-08865 Aliases CVE-2019-11829GHSA-2c6q-2f39-j65x

OS command injection in Synology Calendar

Priority MEDIUM 46CWE-78Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
Low
Impact type
Code execution
Confidentiality · integrity · availability
High · High · High
Fix status
Fixed

Attack profile from CVSS 3.1 · NVD. Fix status from CNA. Impact type from CWE-78.

Summary

OS command injection vulnerability in drivers_syno_import_user.php in Synology Calendar before 2.3.1-0617 allows remote attackers to execute arbitrary commands via the crafted 'X-Real-IP' header.

Why it matters now

EPSS 0.02249 82nd percentileScored 2026-11-07
Fix Fixed Calendar (Synology): 2.3.1-0617

SSVC decision points

Not available: CISA has not published SSVC decision points for this record.

Affected products

VendorProductAffected versionsFixed inStatusSource
SynologyCalendarbefore 2.3.1-06172.3.1-0617Patch availableCNA
  • Calendar VendorSynology Affected before 2.3.1-0617 Fixed in 2.3.1-0617 Patch available CNA

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:synology:calendar:*:*:*:*:*:*:*:*before 2.3.1-0617VulnerableSynology
  • cpe:2.3:a:synology:calendar:*:*:*:*:*:*:*:* Versions before 2.3.1-0617 Vulnerable ·Synology

Remediation

  • Fix · CNA Calendar (Synology) Fixed in 2.3.1-0617

Timeline

  1. 2026-10-02 Threatist record created from CVE-2019-11829
  2. 2026-10-03 Alias added: GHSA-2c6q-2f39-j65x

References

Advisory 1

  • TI-2022-06947 Cross-site request forgery in Synology Calendar CVSS 3.1HIGH 8.0
  • TI-2021-13806 Hard-coded credentials in Synology Calendar CVSS 3.1HIGH 7.5
  • TI-2018-09547 Path traversal in Synology Calendar CVSS 3.0MEDIUM 6.5
  • TI-2018-06465 Incorrect authorization in Synology Calendar CVSS 3.0MEDIUM 6.5
  • TI-2017-11638 Improper access control in Synology Calendar CVSS 3.0MEDIUM 6.5
  • TI-2022-06943 Cross-site scripting in Synology Calendar CVSS 3.1MEDIUM 6.5
See all 10 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences