CVE-2026-84473 | BDVDB-2026-400997 Detail

KiteworksownCloud

Description#

Authentication Bypass / Missing Brute-Force Protection in remote.php/webdav/ in ownCloud ownCloud server 10.16.3 allows an unauthenticated remote attacker to perform unlimited online password guessing against WebDAV accounts via repeated HTTP Basic Authentication requests to the WebDAV endpoint.

Impact#

Per CVSS v3.1: confidentiality impact high, integrity impact high, availability impact high. Attack vector: network.

Weaknesses#

CWE-307
CWE-288 Authentication Bypass Using an Alternate Path or Channel

References#

https://github.com/KOBUKOVUI/CVE-2026-84473

Exploit#

No public exploit known

History#

Version 12026-11-06Record published in the CVE List.
Version 22026-11-10Most recent update recorded in the CVE List.

Published

Published: 2026-11-06
Last modified: 2026-11-10

Vendor information

Vendor: Kiteworks
Product: ownCloud

All Kiteworks vulnerabilities

Score

9.8 Critical

EPSS

less than 1%, Very Low

Estimated chance of exploitation in the next 30 days. EPSS percentile: 27.5.

KEV

Not listed in the CISA Known Exploited Vulnerabilities catalog.

Impact

Authentication Issues

Action

No specific action is recorded in the source data. Check the references for vendor guidance.

Affected Systems

Vulnerable
>= 10.16.3 and < 11.1.0
Fixed
11.1.0

Scoring System

CVSS v4.0

Not available

CVSS v3.1

9.8 Critical

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Metric breakdown
Attack Vector	Network
Attack Complexity	Low
Privileges Required	None
User Interaction	None
Scope	Unchanged
Confidentiality	High
Integrity	High
Availability	High

CVSS v3.0

Not available

CVSS v2

Not available

Source: CVE List v5 (record); CISA KEV (kev, action); FIRST EPSS (epss).