CVE-2015-2851: n/a vulnerability

CVE-2015-2851: client_chown in the sync client in Synology Cloud Station 1.1-2291 through 3.1-3320 on OS X allows local us...

client_chown in the sync client in Synology Cloud Station 1.1-2291 through 3.1-3320 on OS X allows local users to change the ownership of arbitrary files, and consequently obtain root access, by specifying a filename.

UnknownCVSS not scoredNot KEV-listedUpdatedAug 6, 2024, 05:24 UTC (UTC+00:00)

Security readout for executives and security teams

This is an old local privilege-escalation flaw in Synology Cloud Station for OS X. A person who already has local access to an affected Mac could abuse the sync client to change file ownership and potentially gain root access. Exposure is limited to Macs running the affected Synology Cloud Station OS X client versions. Organizations using newer Synology Drive clients or non-OS X platforms are not shown as affected by the provided sources. Prioritize remediation if the legacy OS X client is present, because successful abuse can become full root compromise. If the client is absent, business risk is likely low. Mitigation focus: Inventory Macs for Synology Cloud Station client versions 1.1-2291 through 3.1-3320.; Check Synology and CERT guidance for the supported fixed or replacement client.; Remove or upgrade affected Cloud Station clients where business use is no longer required..

Prepared: Jun 13, 2026, 22:39 UTC (UTC+00:00)

Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.

Potential ATT&CK relevance

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Vulnerability profileCVE Program record

Severity: Unknown
CVSS: Not scored
Known Exploited: No
Published: May 30, 2015, 19:00 UTC (UTC+00:00)

Official CVE source material

CNA and ADP enrichment extracted from CVE v5

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0CVSS vectors

0Timeline events

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1Source links

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Source materials

CVE List V5 sourceCVE List V5

Affected products

Products and packages named in the record

VendorProductVersion / packageStatus

n/an/an/aListed

Weakness

CWE details

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