What is CVE-2020-8229?

CVE-2020-8229 is a medium-severity vulnerability in Nextcloud Desktop, classified under Uncontrolled Resource Consumption. CVSS score: 5.5/10. Published 2020-08-10.

How severe is CVE-2020-8229?

Medium severity. CVSS v3 base score is 5.5 out of 10.

Is CVE-2020-8229 known to be exploited?

2 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.

Resource exhaustion in Nextcloud Desktop

CVE-2020-8229

A memory leak in the OCUtil.dll library used by Nextcloud Desktop Client 2.6.4 can lead to a DoS against the host system.

Vulnerability class: DoS (Denial of Service)

Published 2020-08-10 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 5.5 (Medium). Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H.

EPSS exploit prediction

EPSS: 0.005 (37.9th percentile), scored 2026-10-01.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 38th percentile — 37.9% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.005 · newest: 0.005 · change: 0.000

Affected products

Nextcloud Desktop
Desktop Client — versions Fixed in 2.6.5

Weakness classification (CWE)

Public proof-of-concept exploits

References

hackerone.com/reports/588562 (Exploit, Third Party Advisory)
nextcloud.com/security/advisory/ (Broken Link, Vendor Advisory)

Frequently asked questions

What is CVE-2020-8229?: CVE-2020-8229 is a medium-severity vulnerability in Nextcloud Desktop, classified under Uncontrolled Resource Consumption. CVSS score: 5.5/10. Published 2020-08-10.
How severe is CVE-2020-8229?: Medium severity. CVSS v3 base score is 5.5 out of 10.
Is CVE-2020-8229 known to be exploited?: 2 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.