CVE-2021-33183

Name: CVE-2021-33183
Creator: NVD / NIST
Published: 2021-06-01T14:15:10.183+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 7.9/10EPSS 0.29%

Last modified Jun 17, 2026

CVE-2021-33183 is a high-severity vulnerability rated 7.9/10 on the CVSS scale. Improper limitation of a pathname to a restricted directory ('Path Traversal') vulnerability container volume management component in Synology Docker before 18.09.0-0515 allows local users to read or write arbitrary files via unspecified vectors.. EPSS estimates a 0.29% chance of exploitation in the next 30 days.

Description

Improper limitation of a pathname to a restricted directory ('Path Traversal') vulnerability container volume management component in Synology Docker before 18.09.0-0515 allows local users to read or write arbitrary files via unspecified vectors.

Metrics

CVSS 3.1

7.9/10

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

EPSS Probability

0.29%

20.2th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-22

Affected Software

Vendor	Product	Versions
Synology	Docker	< 18.09.0-0515

References

https://www.synology.com/security/advisory/Synology_SA_21_08Vendor Advisory
https://www.synology.com/security/advisory/Synology_SA_21_08Vendor Advisory

Timeline

Published: Jun 1, 2021
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2021-33183?

How severe is CVE-2021-33183?

CVE-2021-33183 has a CVSS score of 7.9/10 (HIGH severity). The EPSS model estimates a 0.29% probability of exploitation in the next 30 days.

How do I fix CVE-2021-33183?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2021-33183?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST