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Public proof of conceptAwaiting NVD analysis

CVE-2026-84473

CVE-2026-84473

A public proof of concept exists; no exploitation attested.

  • Published2026-11-06
  • WeaknessCWE-288 · CWE-307

Am I 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

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.

Timeline

dates in UTC
  1. 2026-11-0618:25CVE publishedCNA
  2. 2026-11-0619:17CVE publishedNVD
  3. 2026-11-0706:22First public proof of conceptPoC-in-GitHub

Versions per branch

Products declared by the CNA

As certcc, the CNA that assigned this CVE, declared them in the CVE record; versions as written. NVD lists no product for this CVE yet: this is the only product data so far.

  • Kiteworks ownCloud
    Affected
    • ≥ 10.16.3, < 11.1.0fixed in 11.1.0custom

Source: the CNA record (CVE Program), © The MITRE Corporation,CVE Terms of UseCVE recordupdated 2026-11-06

Neither OSV.dev nor the vendor advisories we read list affected versions for CVE-2026-84473 yet.

Full record on NVD

Fix

No fix published by the sources we read yet. NVD record

Detection

read 2026-11-07 06:23 UTC
Nuclei template
none so far
ProjectDiscovery
Exploit-DB
no entry
Exploit-DB
Proof of concept
Metasploit modules
none listed
Metasploit Framework

Sources

Identifiers

Technical details

CVSS v3 Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Published
2026-11-06
Last Modified
2026-11-10
NVD status
Received
GitHub Advisory
GHSA-394x-x23m-q4f9

Frequently asked questions

What is CVE-2026-84473?

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.

Is CVE-2026-84473 actively exploited?

Active exploitation of CVE-2026-84473 has not been confirmed. Its EPSS score was 0.3% on 2026-11-09, the estimated probability of exploitation in the next 30 days.

What is the CVSS score for CVE-2026-84473?

CVE-2026-84473 has a CVSS v3 base score of 9.8 (CRITICAL severity), with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

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