CVE-2016-9463
No exploitation reported by the sources we read.
- Published2017-03-28
- Fixed in9.1.2 · 9.0.4 · 8.2.9
- WeaknessCWE-287 · CWE-303
Am I affected?
Debian, Ubuntu or Red Hat sometimes backport a fix without changing the upstream version number: such a version reads « to verify », never « affected ».With a domain, we read the version its public headers and pages expose. A distribution build can carry the fix under an older number.
Description
Nextcloud Server before 9.0.54 and 10.0.1 & ownCloud Server before 9.1.2, 9.0.6, and 8.2.9 suffer from SMB User Authentication Bypass. Nextcloud/ownCloud include an optional and not by default enabled SMB authentication component that allows authenticating users against an SMB server. This backend is implemented in a way that tries to connect to a SMB server and if that succeeded consider the user logged-in. The backend did not properly take into account SMB servers that have any kind of anonymous auth configured. This is the default on SMB servers nowadays and allows an unauthenticated attacker to gain access to an account without valid credentials. Note: The SMB backend is disabled by default and requires manual configuration in the Nextcloud/ownCloud config file. If you have not configured the SMB backend then you're not affected by this vulnerability.
Timeline
dates in UTC- 2017-03-2802:59CVE publishedNVD
Observed activity
isMalicious corpus · updated 2026-10-23 18:48 UTCBlock these indicators
- Firewall list (EDL, text): https://api.ismalicious.com/edl/cve/CVE-2016-9463?format=txt
- CSV export: https://api.ismalicious.com/edl/cve/CVE-2016-9463?format=csv
- TAXII collection of exploited CVEs
- The EDL and CSV take an API key on the Pro plan.
Versions per branch
NVD| Branch | Affected | Fixed in | Source |
|---|---|---|---|
| 9.1 | ≥ 9.1.0, < 9.1.2 | 9.1.2 | NVD |
| 9.0 | ≥ 9.0.0, < 9.0.4 | 9.0.4 | NVD |
| 8.2 | ≥ 8.2.0, < 8.2.9 | 8.2.9 | NVD |
| Branch | Affected | Fixed in | Source |
|---|---|---|---|
| 10.0 | ≥ 10.0.0, < 10.0.1 | 10.0.1 | NVD |
| 9.0 | < 9.0.54 | 9.0.54 | NVD |
as publishedRanges as NVD and OSV publish them; a distribution’s build can be fixed under an older number.
Fix
- Update Owncloud to 9.1.2 · 9.0.4 · 8.2.9
Advisories and patches
- github.comPatch
- github.comPatch
- github.comPatch
- github.comPatch
- github.comPatch
- nextcloud.comPatch · Vendor Advisory
Detection
- Nuclei template
- none so far ProjectDiscovery
- Exploit-DB
- no entry Exploit-DB
- Proof-of-concept repositories
- none listed PoC-in-GitHub
Sources
- NVDCVSS 3.08.1read 2026-10-23
- NVDCVSS 2.06.8read 2026-10-23
- CNAweakness (CWE)CWE-303read 2026-10-23
- NVDweakness (CWE)CWE-287read 2026-10-23
- FIRST EPSSEPSS score4.1 %2026-10-22
Technical details
- CVSS v3 Vector
- CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
- Published
- 2017-03-28
- Last Modified
- 2026-06-17
- NVD status
- Modified
Frequently asked questions
What is CVE-2016-9463?
Is CVE-2016-9463 actively exploited?
What is the CVSS score for CVE-2016-9463?
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