CVE-2016-6554
Synology NAS servers DS107, DS116, and DS213, use default credentials
CVE-2016-6554 is a critical vulnerability (CVSS 9.8) in Synology Ds107 Firmware, published July 13, 2018. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 4.08%, the 90th percentile. No source names a fixed version.
Synology NAS servers DS107, firmware version 3.1-1639 and prior, and DS116, DS213, firmware versions prior to 5.2-5644-1, use non-random default credentials of: guest:(blank) and admin:(blank) . A remote network attacker can gain privileged access to a vulnerable device.
Attack profile
How easy it is to exploit
- Attack vector
- Network
- Complexity
- Low
- Privileges needed
- None
- User interaction
- None
What an attacker can affect
- Confidentiality
- High
- Integrity
- High
- Availability
- High
Exploit likelihood
What each source reports
NVD Score used
Synology NAS servers DS107, firmware version 3.1-1639 and prior, and DS116, DS213, firmware versions prior to 5.2-5644-1, use non-random default credentials of: guest:(blank) and admin:(blank) . A remote network attacker can gain privileged access to a vulnerable device.
- Record
CVE-2016-6554- CVSS 3.0
- 9.8 Critical
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H - CVSS 2.0
- 10.0 High
AV:N/AC:L/Au:N/C:C/I:C/A:C - Weakness
- CWE-255
- Updated
- 2026-11-02
CVE List No score
Synology NAS servers DS107, DS116, and DS213, use default credentials
Synology NAS servers DS107, firmware version 3.1-1639 and prior, and DS116, DS213, firmware versions prior to 5.2-5644-1, use non-random default credentials of: guest:(blank) and admin:(blank) . A remote network attacker can gain privileged access to a vulnerable device.
- Record
CVE-2016-6554- Weakness
- CWE-255
- Updated
- 2026-11-02
EUVDEUVD-2016-7475 No score
Synology NAS servers DS107, firmware version 3.1-1639 and prior, and DS116, DS213, firmware versions prior to 5.2-5644-1, use non-random default credentials of: guest:(blank) and admin:(blank) . A remote network attacker can gain privileged access to a vulnerable device.
- Record
EUVD-2016-7475- Updated
- 2026-11-03
GitHub AdvisoriesGHSA-q999-pmcf-gq4r
Synology NAS servers DS107, firmware version 3.1-1639 and prior, and DS116, DS213, firmware...
Synology NAS servers DS107, firmware version 3.1-1639 and prior, and DS116, DS213, firmware versions prior to 5.2-5644-1, use non-random default credentials of: guest:(blank) and admin:(blank) . A remote network attacker can gain privileged access to a vulnerable device.
- Record
GHSA-q999-pmcf-gq4r- CVSS 3.0
- 9.8 Critical
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H - Updated
- 2026-11-02
Affected products
History
| When | Changed | Sources |
|---|---|---|
| 2026-11-03 | aliases | EUVD |
| 2026-11-02 | created | CVE List, GitHub Advisories, NVD |