VIR Vulnerability Intelligence Relay

CVE-2017-15887

critical
Published 2017-11-07 · Modified 2026-05-13
CVSS v3
9.8
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CVSS v2
5.0
VIR risk
9.8

Description

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.

Predictions

Exploit likelihood
97%
Patch ETA
—

Heuristic predictions, AS-IS, for prioritization only.

Mitigations

vendor Authored 2026-05-27

Vendor advisory: security@synology.com — https://www.synology.com/en-global/support/security/Synology_SA_17_64_CardDAV_Server

Application impact
VendorProductVersionsFixed
synologycarddav_server{"endExcluding":"6.0.7-0085"}6.0.7-0085

References

CWEs

CWE-307

Verify integrity in audit chain (admin only). AS-IS.