CVE-2021-47960

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Summary

CVECVE-2021-47960
StatePUBLISHED
Assignersynology
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-04-10 10:16:02 UTC
Updated2026-05-29 19:06:23 UTC
DescriptionA files or directories accessible to external parties vulnerability in Synology SSL VPN Client before 1.4.5-0684 allows remote attackers to access files within the installation directory via a local HTTP server bound to the loopback interface. By leveraging user interaction with a crafted web page, attackers may retrieve sensitive files such as configuration files, certificates, and logs, leading to information disclosure.

Risk And Classification

Primary CVSS: v3.1 6.5 MEDIUM from [email protected]

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N

EPSS: 0.000330000 probability, percentile 0.101220000 (date 2026-06-03)

Problem Types: CWE-552 | CWE-552 Files or Directories Accessible to External Parties

VersionSourceTypeScoreSeverityVector
3.1[email protected]Primary6.5MEDIUMCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N
3.1CNACVSS6.5MEDIUMCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N

CVSS v3.1 Breakdown

Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
Required
Scope
Unchanged
Confidentiality
High
Integrity
None
Availability
None

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N

NVD Known Affected Configurations (CPE 2.3)

TypeVendorProductVersionUpdateEditionLanguage
Application Synology Ssl Vpn Client All All All All

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Synology Synology SSL VPN Client affected * 1.4.5-0684 semver Not specified

References

ReferenceSourceLinkTags
www.synology.com/en-global/security/advisory/Synology_SA_26_05 [email protected] www.synology.com Vendor Advisory
CVE Program record CVE.ORG www.cve.org canonical
NVD vulnerability detail NVD nvd.nist.gov canonical, analysis

Vendor Comments And Credit

Discovery Credit

CNA: Laurent Sibilla (https://www.linkedin.com/in/lsibilla/) (en)

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