9.8Critical

CVE-2026-84473CVE-2026-84473

Kiteworks ownCloud Published: 2026-11-06 21:25 (8 days ago)

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.

Weakness (CWE): CWE-307 CWE-288

Data: CVE.org, NVD, CISA KEV, FIRST EPSS, Ubuntu. Published as the sources state it, in English.

Affected products and versions

Vendor	Product	Versions
Kiteworks	ownCloud	10.16.3 – < 11.1.0

References and patches

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

CVSS score

9.8Critical

Source: CISA-ADP · CVSS 3.1

Attack vector: Network
Attack complexity: Low
Privileges required: None
User interaction: None
Scope: Unchanged
Confidentiality: High
Integrity: High
Availability: High

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

All scores (2)

CISA-ADP	CVSS 3.1	9.8Critical
134c704f-9b21-4f2e-91b3-4a467353bcc0	CVSS 3.1	9.8Critical

EPSS (chance of exploitation in 30 days)

0.52%

higher than 45% of all CVEs

CISA assessment (SSVC)

Exploitation: none
Automatable: yes
Technical impact: total

Timeline

ID reserved2026-09-01
Published2026-11-06 21:25
Reached IP-DB2026-11-06 22:03
Last updated2026-11-12 23:04

Assigned by (CNA): certcc
NVD status: Awaiting Analysis

View at source: CVE.org · NVD

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