How severe is CVE-2015-2851?

CVE-2015-2851 has a CVSS 2.0 base score of 6.8, rated medium severity.

Is CVE-2015-2851 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (51st percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2015-2851?

CVE-2015-2851 primarily affects Synology Cloud Station. In total, 13 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2015-2851?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

When was CVE-2015-2851 published?

CVE-2015-2851 was published on 2015-05-30 and last updated on 2026-06-17.

CVE-2015-2851

CVE-2015-2851 is a medium-severity vulnerability in Synology Cloud Station with a CVSS 2.0 base score of 6.8. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-264.

Key facts

Severity: Medium (CVSS 2.0 base score 6.8)
EPSS exploit prediction: 1% (51st percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-264
Affected product: Synology Cloud Station
Published: 2015-05-30
Last modified: 2026-06-17

Description

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.

Frequently asked questions

What is 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 users to change the ownership of arbitrary files, and consequently obtain root access, by specifying a filename.
How severe is CVE-2015-2851?: CVE-2015-2851 has a CVSS 2.0 base score of 6.8, rated medium severity.
Is CVE-2015-2851 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (51st percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2015-2851?: CVE-2015-2851 primarily affects Synology Cloud Station. In total, 13 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2015-2851?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2015-2851 published?: CVE-2015-2851 was published on 2015-05-30 and last updated on 2026-06-17.

References

Affected products (13)

cpe:2.3:a:synology:cloud_station:1.1-2291:*:*:*:*:*:*:*
cpe:2.3:a:synology:cloud_station:2.0-2291:*:*:*:*:*:*:*
cpe:2.3:a:synology:cloud_station:2.0-2402:*:*:*:*:*:*:*
cpe:2.3:a:synology:cloud_station:2.1-2561:*:*:*:*:*:*:*
cpe:2.3:a:synology:cloud_station:2.1-2570:*:*:*:*:*:*:*
cpe:2.3:a:synology:cloud_station:2.1-2577:*:*:*:*:*:*:*
cpe:2.3:a:synology:cloud_station:3.0-3005:*:*:*:*:*:*:*
cpe:2.3:a:synology:cloud_station:3.0-3103:*:*:*:*:*:*:*
cpe:2.3:a:synology:cloud_station:3.0-3108:*:*:*:*:*:*:*
cpe:2.3:a:synology:cloud_station:3.0-3109:*:*:*:*:*:*:*
cpe:2.3:a:synology:cloud_station:3.0-3111:*:*:*:*:*:*:*
cpe:2.3:a:synology:cloud_station:3.1-3317:*:*:*:*:*:*:*
cpe:2.3:a:synology:cloud_station:3.1-3320:*:*:*:*:*:*:*

Other CWE-264 (Permissions, Privileges, and Access Controls) vulnerabilities

CVE-2016-8363 — Critical (CVSS 10.0): An issue was discovered in Moxa OnCell OnCellG3470A-LTE, AWK-1131A/3131A/4131A Series, AWK-3191 Series, AWK-5232/6232…
CVE-2016-7457 — Critical (CVSS 10.0): VMware vRealize Operations (aka vROps) 6.x before 6.4.0 allows remote authenticated users to gain privileges, or halt…
CVE-2015-7425 — Critical (CVSS 10.0): The Data Protection component in the VMware vSphere GUI in IBM Tivoli Storage Manager for Virtual Environments: Data…
CVE-2015-8267 — Critical (CVSS 10.0): The PasswordReset.Controllers.ResetController.ChangePasswordIndex method in PasswordReset.dll in Dovestones AD Self…
CVE-2015-7919 — Critical (CVSS 10.0): SearchBlox 8.3 before 8.3.1 allows remote attackers to write to the config file, and consequently cause a denial of…
CVE-2015-7071 — Critical (CVSS 10.0): The File Bookmark component in Apple OS X before 10.11.2 allows attackers to bypass a sandbox protection mechanism for…

Browse all CWE-264 (Permissions, Privileges, and Access Controls) vulnerabilities →