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TI-2017-11634 Aliases CVE-2017-15887GHSA-prqg-8whh-c62q

Missing brute-force protection in Synology CardDAV Server

Priority MEDIUM 46CWE-307Published · Updated

Key facts

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

Attack profile from CVSS 3.0 · NVD. Fix status from CNA. Impact type from CWE-307.

Summary

An improper restriction of excessive authentication attempts vulnerability in /principals in Synology CardDAV Server before 6.0.7-0085 allows remote attackers to obtain user credentials via a brute-force attack.

Why it matters now

EPSS 0.01936 80th percentileScored 2026-11-07
Fix Fixed Synology CardDAV Server (Synology): 6.0.7-0085

SSVC decision points

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

Affected products

VendorProductAffected versionsFixed inStatusSource
SynologySynology CardDAV Serverbefore 6.0.7-00856.0.7-0085Patch availableCNA
  • Synology CardDAV Server VendorSynology Affected before 6.0.7-0085 Fixed in 6.0.7-0085 Patch available CNA

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:synology:carddav_server:*:*:*:*:*:*:*:*before 6.0.7-0085VulnerableSynology
  • cpe:2.3:a:synology:carddav_server:*:*:*:*:*:*:*:* Versions before 6.0.7-0085 Vulnerable ·Synology

Remediation

  • Fix · CNA Synology CardDAV Server (Synology) Fixed in 6.0.7-0085

Timeline

  1. 2026-10-02 Threatist record created from CVE-2017-15887
  2. 2026-10-03 Alias added: GHSA-prqg-8whh-c62q

References

Advisory 1

  • TI-2022-10594 SQL injection in Synology CardDAV Server CVSS 3.1HIGH 8.8
  • TI-2018-06466 Cross-site scripting in Synology CardDAV Server CVSS 3.0MEDIUM 6.5

Sources

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