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CVE-2013-6955

89
FAUCET Score

CVE-2013-6955 is a critical vulnerability affecting Synology DiskStation Manager (DSM) versions 4.0, 4.2, and 4.3. It allows remote attackers to append data to arbitrary files and execute arbitrary code by manipulating the SLICEUPLOAD X-TMP-FILE HTTP header in webman/imageSelector.cgi. With a CVSS score of 10.0, this vulnerability is easily exploitable over the network with no authentication required, leading to complete compromise of confidentiality, integrity, and availability. Exploit code, including a Metasploit module, is publicly available, indicating a high potential for exploitation, despite limited community discussion or media coverage.

Impacted Technologies

VendorProductVersion(s)CPE
4.0CPE matchmatch criteria
cpe:2.3:o:synology:diskstation_manager:4.0:*:*:*:*:*:*:*
4.2CPE matchmatch criteria
cpe:2.3:o:synology:diskstation_manager:4.2:*:*:*:*:*:*:*
4.3CPE matchmatch criteria
cpe:2.3:o:synology:diskstation_manager:4.3:*:*:*:*:*:*:*
4.3-3810CPE matchmatch criteria
cpe:2.3:o:synology:diskstation_manager:4.3-3810:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 2.0

10.0HIGH

AV:N/AC:L/Au:N/C:C/I:C/A:C

Confidentiality Impact
COMPLETE
Integrity Impact
COMPLETE
Availability Impact
COMPLETE
Access Vector
NETWORK
Access Complexity
LOW
Authentication
NONE
Exploitability Score
10.0
Impact Score
10.0
CvssVersion
2.0

Exploit Intelligence

EPSS Score
84.57%
Probability of exploitation in next 30 days
EPSS Percentile
99.7%
Percentile rank of EPSS score among Peer Group
As of 2026-07-24
Model: v2026.06.15
Metasploit: Synology DiskStation Manager SLICEUPLOAD Remote Command Execution · Oct 31, 2013
ExploitDB: EDB-30470 · Dec 24, 2013
This CVE's current EPSS score of 0.8457 is in the 100th percentile among its peer group of 51,466 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.1 Mastodon, and 0.4 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Remediation records are not available for this CVE.

References

kb.cert.org / vuls/id/615910
US Government Resource