Which products and versions are affected by CVE-2017-9554?

Affected: Diskstation Manager (Synology). The full list is in the CVE brief.

Is CVE-2017-9554 being exploited in the wild?

It is exploited in the wild, listed in Industry KEV feed since Dec 23, 2021.

Is CVE-2017-9554 in the CISA KEV catalog?

No, it is not currently listed in the CISA Known Exploited Vulnerabilities catalog.

Is there a public exploit for CVE-2017-9554?

Public exploit code is available.

Is there a fix for CVE-2017-9554?

Fixed versions are available, including Diskstation Manager 6.1.1-15101-4.

How urgently should CVE-2017-9554 be patched?

Brandefense priority: patch immediately, because it is listed as exploited in the wild.

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Vulnerability Intelligence

CVE-2017-9554

MediumExploitedPublic exploit

An information exposure vulnerability in forget_passwd.cgi in Synology DiskStation Manager (DSM) before 6.1.3-15152 allows remote attackers to enumerate valid usernames via unspecified vectors.

Published Jul 24, 2017 · Updated May 12, 2026

Key Facts

Patch immediately

CVE-2017-9554 is a medium-severity vulnerability (CVSS 5.3 v3) affecting Diskstation Manager (Synology).
It is exploited in the wild, listed in Industry KEV feed since Dec 23, 2021. Public exploit code is available.
EPSS estimates a 77% probability of exploitation in the next 30 days.
Fixed versions are available, including Diskstation Manager 6.1.1-15101-4.
Brandefense priority: patch immediately, because it is listed as exploited in the wild.

CVSS v3

5.3

CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N

EPSS (30-day exploit likelihood)

77%

Higher than 99.5% of all scored CVEs

Exploited in the wild

Yes

1 catalog listing

Public exploit code

Available

Proof-of-concept or weaponized module

Get the full CVE-2017-9554 brief as a PDF

Every affected product and fixed release, exploitation status and a first 24 hours response checklist, emailed within minutes.

Description

An information exposure vulnerability in forget_passwd.cgi in Synology DiskStation Manager (DSM) before 6.1.3-15152 allows remote attackers to enumerate valid usernames via unspecified vectors.

Known-Exploited Catalog Listings

Catalog	Added	Remediation due	Ransomware use
Industry KEV feed	Dec 23, 2021	n/a	Not reported

Required action: Apply remediations or mitigations per vendor instructions or discontinue use of the product if remediation or mitigations are unavailable.

Affected Products

1 affected entries in total

Product	Affected versions	Fixed in
Diskstation ManagerSynology	See advisory	6.1.1-15101-4

Patched Releases

Diskstation Manager

6.1.1-15101-4

Timeline

Publicly disclosed
Jul 24, 2017
Added to Industry KEV feed
Dec 23, 2021
Last updated
May 12, 2026

Weakness Type

CWE-200 Exposure of Sensitive Information to an Unauthorized Actor

References

advisoryhttps://www.synology.com/en-global/support/security/Synology_SA_17_29_DSM
exploitVulnCheck exploitation report
exploitExploitDB-43455
other43455

FAQ

Common Questions.

An information exposure vulnerability in forget_passwd.cgi in Synology DiskStation Manager (DSM) before 6.1.3-15152 allows remote attackers to enumerate valid usernames via unspecified vectors.
Affected: Diskstation Manager (Synology). The full list is in the CVE brief.
It is exploited in the wild, listed in Industry KEV feed since Dec 23, 2021.
No, it is not currently listed in the CISA Known Exploited Vulnerabilities catalog.
Public exploit code is available.
Fixed versions are available, including Diskstation Manager 6.1.1-15101-4.
Brandefense priority: patch immediately, because it is listed as exploited in the wild.

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