CVSS 3.1
9.8 criticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:HCVE-2026-84473 kiteworks owncloud
Critical (9.8) in kiteworks owncloud. EPSS 0.5% estimated probability of exploitation activity in the next 30 days.
On this page
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.
Severity
- EPSS
- 0.5% estimated probability of exploitation activity in the next 30 days; 45th percentile. Scored 2026-11-13. A forecast for this CVE across the internet, not for your own systems.
- CISA's assessment (SSVC)
- Exploitation: none · Automatable: yes · Technical impact: total, assessed 2026-11-10. From CISA's Vulnrichment in the CVE List: whether it is exploited, whether exploiting it can be automated, and how much control it gives.
- CWEs
- CWE-288 Authentication Bypass Using an Alternate Path or Channel
CWE-307 Improper Restriction of Excessive Authentication Attempts - OWASP Top 10
- A07:2025 Authentication Failures
- Published
- Modified
- Assigned by
- certcc (CNA)
- NVD analysis
- Awaiting analysis
- Record from
- the NVD, synced
Ask an AI about this CVE
Show the prompt
Explain CVE-2026-84473 for an engineer deciding whether to act. Use https://cve.bz/api/public/cves/CVE-2026-84473?via=ask-ai-copy and https://cve.bz/cve/CVE-2026-84473?via=ask-ai-copy as the source of truth: what is affected and which versions fix it, whether it is in CISA KEV, public exploits, and its EPSS (an internet-wide 30-day estimate of exploitation activity, not a forecast for my systems). If they give no fixed versions, use the CVE record https://cveawg.mitre.org/api/cve/CVE-2026-84473 or the vendor advisory, not third-party mirrors. Tell me how to check whether I am affected and how to verify a fix. Cite the sources and say where they are uncertain.Opens a third-party assistant; its answer is its own, not cve.bz's. The prompt holds only this CVE's id and public links.
Badge for a README or a site
An image that stays current: it is drawn from the data each time it is fetched (a host that proxies images, as GitHub does, may show its copy for a while). Markdown:
[](https://cve.bz/cve/CVE-2026-84473)
HTML:
<a href="https://cve.bz/cve/CVE-2026-84473"><img src="https://cve.bz/cve/badge/CVE-2026-84473.svg" alt="CVE-2026-84473"></a>
Affected
Versions
From the CNA's record in the CVE List.
| Product | Affected |
|---|---|
| Kiteworks ownCloud | from 10.16.3 before 11.1.0 |
GitHub PoC (unverified)
Repositories on GitHub named after this CVE. Nobody has checked them and they are not scanned: some hold a working proof of concept, some nothing useful, and some malware made to look like one. Read the code before you run any of it.
- KOBUKOVUI/CVE-2026-84473 0 stars, created
Security research and vulnerability disclosure for the ownCloud ONLYOFFICE Integration app, including technical analysis, PoCs, impact, and…
Attack patterns (CAPEC)
- CAPEC-127 Directory Indexing Likelihood: High · Severity: Medium
- CAPEC-665 Exploitation of Thunderbolt Protection Flaws Likelihood: Low · Severity: Very High
- CAPEC-16 Dictionary-based Password Attack Likelihood: Medium · Severity: High
- CAPEC-49 Password Brute Forcing Likelihood: Medium · Severity: High
- CAPEC-560 Use of Known Domain Credentials Likelihood: High · Severity: High
- CAPEC-565 Password Spraying Likelihood: High · Severity: High
- CAPEC-600 Credential Stuffing Likelihood: High · Severity: High
- CAPEC-652 Use of Known Kerberos Credentials Likelihood: Medium · Severity: High
- CAPEC-653 Use of Known Operating System Credentials Likelihood: High · Severity: High
The attack patterns MITRE's CAPEC relates to this record's weaknesses, as MITRE names them. Credits.
History
- Scored 9.8 critical
Changes since this site first stored the record. The same for every record: /api/public/changes.