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TI-2021-13806 Aliases CVE-2021-34812GHSA-w3f5-2mqc-5c62

Hard-coded credentials in Synology Calendar

Priority LOW 35CWE-798Published · Updated

Key facts

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

Attack profile from CVSS 3.1 · NVD. Fix status from CNA. Impact type from CWE-798.

Summary

Use of hard-coded credentials vulnerability in php component in Synology Calendar before 2.4.0-0761 allows remote attackers to obtain sensitive information via unspecified vectors.

Why it matters now

EPSS 0.01119 66th percentileScored 2026-11-07
Fix Fixed Synology Calendar (Synology): 2.4.0-0761

SSVC decision points

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

Affected products

VendorProductAffected versionsFixed inStatusSource
SynologySynology Calendarbefore 2.4.0-07612.4.0-0761Patch availableCNA
  • Synology Calendar VendorSynology Affected before 2.4.0-0761 Fixed in 2.4.0-0761 Patch available CNA

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:synology:calendar:*:*:*:*:*:*:*:*before 2.4.0-0761VulnerableSynology
  • cpe:2.3:a:synology:calendar:*:*:*:*:*:*:*:* Versions before 2.4.0-0761 Vulnerable ·Synology

Remediation

  • Fix · CNA Synology Calendar (Synology) Fixed in 2.4.0-0761

Timeline

  1. 2026-10-02 Threatist record created from CVE-2021-34812
  2. 2026-10-03 Alias added: GHSA-w3f5-2mqc-5c62

References

Advisory 1

  • TI-2019-08865 OS command injection in Synology Calendar CVSS 3.1CRITICAL 9.8
  • TI-2022-06947 Cross-site request forgery in Synology Calendar CVSS 3.1HIGH 8.0
  • 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