webman/imageSelector.cgi in Synology DiskStation Manager (DSM) 4.0 before 4.0-2259, 4.2…
Priority HIGH 84CWE-264Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- — Not recorded in CVSS 2.0
- Attack complexity
- Low
- Impact type
- Security bypass
- Confidentiality · integrity · availability
- Complete · Complete · Complete
- Fix status
- No fix listed
Attack profile from CVSS 2.0 · NVD. Fix status from CNA. Impact type from CWE-264.
Summary
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.
Why it matters now
EPSS 0.84571 99th percentileScored 2026-11-07
Fix No fix listed No fixed version in the sources yet
SSVC decision points
Not available: CISA has not published SSVC decision points for this record.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| — | — | all versions | — | No fix listed | CNA |
- — Vendor— Affected all versions Fixed in — No fix listed CNA
CPE configurations NVD · 4
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:o:synology:diskstation_manager:4.0:*:*:*:*:*:*:* | 4.0 | Vulnerable | Synology |
| cpe:2.3:o:synology:diskstation_manager:4.2:*:*:*:*:*:*:* | 4.2 | Vulnerable | Synology |
| cpe:2.3:o:synology:diskstation_manager:4.3:*:*:*:*:*:*:* | 4.3 | Vulnerable | Synology |
| cpe:2.3:o:synology:diskstation_manager:4.3-3810:*:*:*:*:*:*:* | 4.3-3810 | Vulnerable | Synology |
- cpe:2.3:o:synology:diskstation_manager:4.0:*:*:*:*:*:*:* Versions 4.0 Vulnerable ·Synology
- cpe:2.3:o:synology:diskstation_manager:4.2:*:*:*:*:*:*:* Versions 4.2 Vulnerable ·Synology
- cpe:2.3:o:synology:diskstation_manager:4.3:*:*:*:*:*:*:* Versions 4.3 Vulnerable ·Synology
- cpe:2.3:o:synology:diskstation_manager:4.3-3810:*:*:*:*:*:*:* Versions 4.3-3810 Vulnerable ·Synology
Remediation
No fixed version listed by the sources yet.
Timeline
- 2026-10-02 Threatist record created from CVE-2013-6955
- 2026-10-03 Alias added: GHSA-cf8x-55vw-78gp
References
Advisory 1
More Synology Diskstation Manager vulnerabilities
- TI-2021-02242 Sudo before 1.9.5p2 contains an off-by-one error that can result in a heap-based buffer… KEVCVSS 3.1HIGH 7.8
- TI-2018-01076 Out-of-bounds write in Netatalk CVSS 3.1CRITICAL 9.8
- TI-2017-10594 Heap-based buffer overflow in dnsmasq before 2.78 allows remote attackers to cause a… CVSS 3.1CRITICAL 9.8
- TI-2021-19843 Out-of-bounds read in Samba CVSS 3.1HIGH 8.8
- TI-2017-11636 Command injection in Synology DiskStation Manager CVSS 3.0HIGH 8.8
- TI-2019-06950 Some HTTP/2 implementations are vulnerable to a settings flood, potentially leading to a… CVSS 3.1HIGH 7.5
Sources
- CVE-2013-6955 · CVE Program
- CVE-2013-6955 · NVD
- FIRST EPSS
- GHSA-cf8x-55vw-78gp · GitHub Advisory Database · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences