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CVE-2016-9464

14
FAUCET Score

CVE-2016-9464 is an improper authorization vulnerability affecting Nextcloud Server versions before 9.0.54 and 10.0.0. The flaw allows a user who received a group share to unshare the file for the entire group, rather than just themselves, due to an API implementation error. This medium-severity vulnerability has a CVSS score of 4.3, indicating a low attack complexity and impact on integrity, with no confidentiality or availability impact. There is no evidence of active exploitation, public exploit code, or significant community discussion surrounding this CVE.

Impacted Technologies

VendorProductVersion(s)CPE
< 9.0.54CPE matchmatch criteria
cpe:2.3:a:nextcloud:nextcloud_server:*:*:*:*:*:*:*:*
10.0CPE matchmatch criteria
cpe:2.3:a:nextcloud:nextcloud_server:10.0:rc1:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.0

4.3MEDIUM

CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
LOW
Availability Impact
NONE
Exploitability Score
2.8
Impact Score
1.4
CvssVersion
3.0

Exploit Intelligence

EPSS Score
1.62%
Probability of exploitation in next 30 days
EPSS Percentile
73.6%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0162 is in the 87th percentile among its peer group of 21,958 CVEs.

Social Chatter

No social media mentions found for this CVE.

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

Media Mentions

No media coverage found for this CVE.

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

Remediation

Patch Available

Vendor Patches (1)

github_advisorypatch availablevia nvd_reference
View patch

References

github.com / nextcloud/server/commit/3387e5d00fcf6b2ea6b285a091e5743f545e7202
Issue TrackingPatchThird Party Advisory
github.com / nextcloud/server/commit/7289cb5ec0b812992ab0dfb889744b94bc0994f0
Issue TrackingPatchThird Party Advisory
github.com / nextcloud/server/commit/a5471b4a3e3f30e99e4de39c97c0c3b3c2f1618f
Issue TrackingPatchThird Party Advisory
github.com / nextcloud/server/commit/e2c4f4f9aa11bc92e8f2212cce73841b922187e8
Issue TrackingPatchThird Party Advisory
hackerone.com / reports/153905
ExploitThird Party Advisory
nextcloud.com / security/advisory
PatchVendor Advisory
securityfocus.com / bid/97287
Third Party AdvisoryVDB Entry