Security readout for executives and security teams
Plain-English summary
CVE-2017-9554 lets a remote attacker learn whether specific usernames exist on Synology DSM systems before 6.1.3-15152. By itself, this is not account takeover, but it reduces guesswork for phishing, password spraying, or targeted login attacks against exposed DSM portals.
Executive priority
Prioritize remediation for internet-facing or business-critical Synology NAS devices. The direct impact is username exposure, but valid usernames can materially improve later credential attacks against storage infrastructure.
Technical view
The vulnerability is an information exposure issue in forget_passwd.cgi in Synology DiskStation Manager before 6.1.3-15152. The CVE states remote attackers can enumerate valid usernames through unspecified vectors. The bundle includes a Synology advisory and an Exploit-DB reference, but no CVSS, CWE, or detailed vendor mitigation text beyond the affected version boundary.
Likely exposure
Organizations are exposed if Synology DSM systems older than 6.1.3-15152 are reachable by untrusted networks, especially internet-facing management interfaces or password recovery workflows.
Exploitation context
A public Exploit-DB reference exists, but the source bundle does not show CISA KEV listing or confirmed active exploitation. Treat this as a publicly documented enumeration weakness, not evidence of current exploitation.
Researcher notes
The public CVE text names forget_passwd.cgi and username enumeration but says vectors are unspecified. Avoid assuming authentication bypass, data theft, or code execution. The affected boundary is DSM before 6.1.3-15152.
Mitigation direction
- Check Synology advisory Synology_SA_17_29_DSM for vendor guidance.
- Upgrade affected DSM systems to 6.1.3-15152 or later fixed releases.
- Reduce untrusted access to DSM management and recovery interfaces.
- Monitor authentication activity for password spraying or targeted login attempts.
Validation and detection
- Inventory Synology DSM versions across managed NAS devices.
- Identify DSM systems older than 6.1.3-15152.
- Confirm whether DSM management interfaces are internet-accessible.
- Review logs for repeated password reset or login probing patterns.
Public sources used
Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.
Conservative CVE-to-ATT&CK context
These mappings and lookup hints may be relevant to the vulnerability behavior, CWE, affected product, or exposure path. Glexia-inferred context is not an official MITRE, ATT&CK, CWE, or CVE Program mapping.
ATT&CK lookup starting points
Use these exact CWE pages and searches to review the Glexia ATT&CK library from this CVE's weakness and description context.
CVE-2017-9554 mapping review
Open the CVE-to-ATT&CK bridge for reviewed, inferred, or future official mappings tied to this CVE.
Open ATT&CK lookup- Severity
- Unknown
- CVSS
- Not scored
- Known Exploited
- No
- Published
CNA and ADP enrichment extracted from CVE v5
These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.
CVSS and timeline data
No CVSS vectors or timeline events were available in the normalized CVE source material.
Source materials
- CVE List V5 sourceCVE List V5
- 43455CVE reference · exploit, x_refsource_EXPLOIT-DB
- https://www.synology.com/en-global/support/security/Synology_SA_17_29_DSMCVE reference · x_refsource_CONFIRM
Products and packages named in the record
CWE details
CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.