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Vulnerabilities

Vulnerability · CVE-2013-6955

webman/imageSelector.cgi in Synology DiskStation Manager (DSM) 4.0 before 4.0-2259, 4.2 before 4.2-3243, and 4.3 before 4.3-3810 Update 1 allows remote attackers to ap…

Published Jan 9, 2014 · catalog updated Jun 17, 2026 · diskstation manager

Last checked Nov 9, 2026. A connected source was read within the last 7 days.

Check this week

CVE-2013-6955 is not in CISA KEV. FIRST estimates a 84.57% chance of exploitation in the next 30 days. Check whether you run diskstation manager.

Gaps on this record

  • No vendor fix or required action is stored. Compare the linked advisory before you change production.

Same product and reporting

Severity
Critical10.0
Known exploitation
Not in CISA/VulnCheck KEV
EPSS
84.57%
Remediation
Not established
Affected products
cpe synology/diskstation manager

webman/imageSelector.cgi in Synology DiskStation Manager (DSM) 4.0 before 4.0-2259, 4.2 before 4.2-3243, and 4.3 before 4.3-3810 Update 1 allows remote attackers to append data to arbitrary files, and consequently execute arbitrary code, via a pathname in the SLICEUPLOAD X-TMP-FILE HTTP header.

Are you affected?

Enter the version you run. The result uses only the ranges stored on this record.

The check returns affected, not affected, or incomplete. It does not guess a version that is missing from the record.

  • cpe synology/diskstation manager4.0
  • cpe synology/diskstation manager4.2
  • cpe synology/diskstation manager4.3
  • cpe synology/diskstation manager4.3-3810

How to fix CVE-2013-6955

What to do

Three questions, each answered from this record only. Confirm the vendor advisory before you patch.

Should you patch?

CVE-2013-6955 is not in CISA KEV. FIRST estimates a 84.57% chance of exploitation in the next 30 days. Check whether you run diskstation manager.

Which versions are affected?

Compare what you have installed with synology/diskstation manager 4.0; synology/diskstation manager 4.2; synology/diskstation manager 4.3; synology/diskstation manager 4.3-3810. Compare the installed version with the linked vendor advisory before you change production.

What should an analyst verify?

CWE-264. EPSS 84.57%. There is no CISA KEV listing. A public exploit reference is linked in Sources. That is not the same as confirmed exploitation. Use the source links for the original advisory.

Technology hubs

Synology DSM security

Code

The project this record applies to. Exploit listings stay in References.

No public source repository is identified for this product.

Timeline

Detection, updates, and resolution for this record.

  1. Jan 9, 2014 · Monitored products — high

    Detected

    webman/imageSelector.cgi in Synology DiskStation Manager (DSM) 4.0 before 4.0-2259, 4.2 before 4.2-3243, and 4.3 before 4.3-3810 Update 1 allows remote attackers to append data to arbitrary files, and consequently execute arbitrary code, via a pathname in the SLICEUPLOAD X-TMP-FILE HTTP header.

  2. Jun 17, 2026 · Monitored products — high

    Updated

    webman/imageSelector.cgi in Synology DiskStation Manager (DSM) 4.0 before 4.0-2259, 4.2 before 4.2-3243, and 4.3 before 4.3-3810 Update 1 allows remote attackers to append data to arbitrary files, and consequently execute arbitrary code, via a pathname in the SLICEUPLOAD X-TMP-FILE HTTP header.

Sources

  • CVE.orgVulnerability recordCVE-2013-6955

    Official CVE identifier

    cve.org
  • Monitored products — highVendor advisoryCVE-2013-6955

    webman/imageSelector.cgi in Synology DiskStation Manager (DSM) 4.0 before 4.0-2259, 4.2 before 4.2-3243, and 4.3 before 4.3-3810 Update 1 allows remote attackers to append data to arbitrary files, and consequently execute arbitrary code, via a pathname in the SLICEUPLOAD X-TMP-FILE HTTP header.

    nvd.nist.gov
  • Metasploit ModulesPublic exploit moduleexploit_linux/http/synology_dsm_sliceupload_exec_noauth

    Public module reference (excellent). Module source is not copied into this catalog.

    rapid7.com

References

Freshness

Last verified in this catalog Nov 9, 2026. Significant claims (KEV, EPSS, CVSS, affected ranges) come from the source rows above — open the original publisher for the authoritative advisory.

  • Metasploit ModulesNov 9, 2026
  • CVE.orgNov 6, 2026
  • Monitored products — highNov 6, 2026