CVE-2013-6955

NONECVSS 0.0Weaponized
0.0
EchelonGraph verdictPatch this weekExploitation is likely or a public exploit exists.
  • High exploitation likelihood — EPSS 85%
CISA-KEV: Not listedEPSS: 85%CVSS: —Exploit: NoneExposed: 0

No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.

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.

CVSS v3
—
EG Score
0.0(none)
EPSS
99.7%
KEV
Not listed

Published

January 9, 2014

Last Modified

April 29, 2026

References (2)

Data Freshness Timeline

(refreshed 2× in last 7d / 20× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

  1. 2026-07-04 06:27 UTCEPSS rescore
  2. 2026-07-01 15:02 UTCEPSS rescore
  3. 2026-06-28 04:53 UTCEPSS rescore
  4. 2026-06-28 04:53 UTCEPSS rescore
  5. 2026-06-24 14:02 UTCEPSS rescore
  6. 2026-06-24 14:02 UTCEPSS rescore
  7. 2026-06-23 21:30 UTCEPSS rescore
  8. 2026-06-23 21:30 UTCEPSS rescore
  9. 2026-06-21 01:57 UTCEPSS rescore
  10. 2026-06-21 01:57 UTCEPSS rescore
  11. 2026-06-18 17:49 UTCEPSS rescore
  12. 2026-06-18 17:49 UTCEPSS rescore
  13. 2026-06-17 17:49 UTCEPSS rescore
  14. 2026-06-17 17:49 UTCEPSS rescore
  15. 2026-06-15 17:44 UTCEPSS rescore
  16. 2026-06-14 23:14 UTCEPSS rescore
  17. 2026-06-12 23:08 UTCEPSS rescore
  18. 2026-06-11 13:56 UTCEPSS rescore
  19. 2026-06-10 22:15 UTCEPSS rescore
  20. 2026-06-10 13:18 UTCEPSS rescore
  21. 2026-06-06 13:45 UTCEPSS rescore
  22. 2026-06-06 13:45 UTCEPSS rescore
  23. 2026-06-05 22:44 UTCEPSS rescore
  24. 2026-06-05 22:44 UTCEPSS rescore
  25. 2026-06-05 06:08 UTCEPSS rescore
Show 26 more
  1. 2026-06-05 06:08 UTCEPSS rescore
  2. 2026-06-04 13:09 UTCEPSS rescore
  3. 2026-06-04 13:09 UTCEPSS rescore
  4. 2026-06-02 20:10 UTCEPSS rescore
  5. 2026-06-02 20:10 UTCEPSS rescore
  6. 2026-05-31 22:28 UTCEPSS rescore
  7. 2026-05-31 22:28 UTCEPSS rescore
  8. 2026-05-31 00:14 UTCEPSS rescore
  9. 2026-05-31 00:14 UTCEPSS rescore
  10. 2026-05-28 20:58 UTCEG score recompute
  11. 2026-05-28 20:58 UTCGHSA enrichment
  12. 2026-05-28 13:42 UTCEPSS rescore
  13. 2026-05-28 13:42 UTCEPSS rescore
  14. 2026-05-28 13:42 UTCEPSS rescore
  15. 2026-05-27 13:38 UTCEPSS rescore
  16. 2026-05-27 13:38 UTCEPSS rescore
  17. 2026-05-26 07:16 UTCEPSS rescore
  18. 2026-05-26 07:16 UTCEPSS rescore
  19. 2026-05-22 21:15 UTCEPSS rescore
  20. 2026-05-22 21:15 UTCEPSS rescore
  21. 2026-05-22 21:15 UTCEPSS rescore
  22. 2026-05-21 22:39 UTCEPSS rescore
  23. 2026-05-20 22:37 UTCEPSS rescore
  24. 2026-05-20 22:37 UTCEPSS rescore
  25. 2026-05-18 21:29 UTCEPSS rescore
  26. 2026-05-18 21:29 UTCEPSS rescore

Publicly available exploits

(2 references)

Working exploit code is in the public domain (1 Metasploit module) (1 Exploit-DB entry). Defenders should treat patch urgency accordingly — public PoCs typically lead to mass-exploitation within 24-72 hours.

  • Exploit-DBEDB-30470✓ verified
    First seen Dec 24, 2013

    Synology DiskStation Manager - SLICEUPLOAD Remote Command Execution (Metasploit)

    Open source ↗
  • Metasploitexploit/linux/http/synology_dsm_sliceupload_exec_noauth✓ verified
    First seen Oct 31, 2013

    Synology DiskStation Manager SLICEUPLOAD Remote Command Execution

    Open source ↗

Frequently asked(4)

What is CVE-2013-6955?
CVE-2013-6955 is a none vulnerability published on January 9, 2014. 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.
When was CVE-2013-6955 disclosed?
CVE-2013-6955 was first published in the National Vulnerability Database on January 9, 2014, with the most recent update on April 29, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2013-6955 actively exploited?
CVE-2013-6955 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 99.7% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
How do I remediate CVE-2013-6955?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2013-6955, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

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