Samba 3.2.x through 3.6.x before 3.6.20, 4.0.x before 4.0.11, and 4.1.x before 4.1.1, when vfs_streams_depot or vfs_streams_xattr is enabled, allows remote attackers to bypass intended file restrictions by leveraging ACL differences between a file and an associated alternate data stream (ADS).
CVE-2013-4475
MEDIUMCVSS v2 · 4.04.0—Elevated
EchelonGraph scoreLOW confidence
This CVE was only ever scored under CVSS v2.0. NVD CVSS v2.0 base 4.0 — v2 rates that MEDIUM (v2 bands: LOW 0.0–3.9 / MEDIUM 4.0–6.9 / HIGH 7.0–10.0; v2 has no CRITICAL band). Vector AV:N/AC:H/Au:N/C:P/I:P/A:N. CVSS v2 is an older, coarser metric than v3.1/v4.0 (no Scope, no User Interaction, no Attack Requirements), so it is not directly comparable to a v3 or v4 score. NVD has never re-scored this record under v3. EPSS predicts 9.0% exploitation probability in the next 30 days, which is reflected in EG Risk but does not lift the v2 base. Confidence: LOW.
Sources: epss, nvd_v2
4.0EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
- Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 9.0%CVSS v2: 4.0Exploit: Elevated riskExposed services: —
A fix is available — apply it.
Internet exposure
The internet-exposure footprint is temporarily unavailable — the KEV-Exposure radar's record for this CVE could not be loaded just now. That is not a finding of zero exposed services; please retry shortly.
- CVSS v2.0 (legacy)
- 4.0MEDIUMNVD never assigned a CVSS v3 rating to this CVE
- EG Score
- 4.0MEDIUMlow confidence
- EG Risk
- 39EG Risk 39/100CISA SSVC
EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).
How it’s computedSeverity40% × 45%Exploitation40% × 40%Automatability30% × 15%CISA SSVC: Track at low, Track or Track* at medium and Track* or Attend at high mission impact.Action: A fix is available. Apply it within your standard update timelines at low or medium mission impact and sooner than that at high. - EPSS PROB
- 9.0%
- EPSS %ILE
- 95th
- KEV
- Not listed
CISA SSVCTrack at low, Track or Track* at medium and Track* or Attend at high mission impact.
A fix is available. Apply it within your standard update timelines at low or medium mission impact and sooner than that at high.
Exploitation public PoC (EG-KEV: elevated) · Automatable unknown (not published for this CVE) · Technical impact unknown (not published for this CVE). Mission impact is CISA's Mission & Well-being decision point, and only you can judge it: high means the affected system is essential to your organisation's mission, or its compromise could cause irreversible harm to people. CISA's decision table
Published
November 13, 2013
Last Modified
April 29, 2026
References (38)
- secalert@redhathttp://lists.fedoraproject.org/pipermail/package-announce/2014-August/136864.html
- secalert@redhathttp://lists.opensuse.org/opensuse-security-announce/2014-01/msg00002.html
- secalert@redhathttp://lists.opensuse.org/opensuse-updates/2013-11/msg00083.html
- secalert@redhathttp://lists.opensuse.org/opensuse-updates/2013-11/msg00115.html
- secalert@redhathttp://lists.opensuse.org/opensuse-updates/2013-11/msg00117.html
- secalert@redhathttp://lists.opensuse.org/opensuse-updates/2013-12/msg00088.html
- secalert@redhathttp://rhn.redhat.com/errata/RHSA-2013-1806.html
- secalert@redhathttp://rhn.redhat.com/errata/RHSA-2014-0009.html
- secalert@redhathttp://secunia.com/advisories/56508
- secalert@redhathttp://security.gentoo.org/glsa/glsa-201502-15.xml
- secalert@redhathttp://www.debian.org/security/2013/dsa-2812
- secalert@redhathttp://www.samba.org/samba/history/samba-3.6.20.html
- secalert@redhathttp://www.samba.org/samba/history/samba-4.0.11.html
- secalert@redhathttp://www.samba.org/samba/history/samba-4.1.1.html
- secalert@redhathttp://www.samba.org/samba/security/CVE-2013-4475
Vendor Advisories for CVE-2013-4475
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Weakness Classification(1)
MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.
Related CVEs
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Frequently asked(4)
What is CVE-2013-4475?
CVE-2013-4475 is a medium vulnerability published on November 13, 2013. Samba 3.2.x through 3.6.x before 3.6.20, 4.0.x before 4.0.11, and 4.1.x before 4.1.1, when vfsstreamsdepot or vfsstreamsxattr is enabled, allows remote attackers to bypass intended file restrictions by leveraging ACL differences between a file and an associated alternate data stream (ADS).
When was CVE-2013-4475 disclosed?
CVE-2013-4475 was first published on November 13, 2013, 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-2013-4475 actively exploited?
CVE-2013-4475 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 9.0% probability of exploitation in the next 30 days (95th percentile of EPSS-scored CVEs).
How do I remediate CVE-2013-4475?
A fix for CVE-2013-4475 is available: update to the fixed version the vendor names in its advisory.
Dependency Blast Radius
Explore the affected products and dependency analysis for CVE-2013-4475
Is Your Infrastructure Affected by CVE-2013-4475?
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