CVE-2021-29086

Name: CVE-2021-29086
Creator: NVD / NIST
Published: 2021-06-23T10:15:08.407+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 7.5/10EPSS 1.18%

Last modified Jun 17, 2026

CVE-2021-29086 is a high-severity vulnerability rated 7.5/10 on the CVSS scale. Exposure of sensitive information to an unauthorized actor vulnerability in webapi component in Synology DiskStation Manager (DSM) before 6.2.3-25426-3 allows remote attackers to obtain sensitive information via unspecified vectors.. EPSS estimates a 1.18% chance of exploitation in the next 30 days.

Description

Exposure of sensitive information to an unauthorized actor vulnerability in webapi component in Synology DiskStation Manager (DSM) before 6.2.3-25426-3 allows remote attackers to obtain sensitive information via unspecified vectors.

Metrics

CVSS 3.1

7.5/10

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

EPSS Probability

1.18%

63.8th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

Vendor	Product	Versions
Synology	Diskstation Manager	>= 6.2, < 6.2.3-25426-3
Synology	Diskstation Manager Unified Controller	< 3.1-23033

References

https://www.synology.com/security/advisory/Synology_SA_20_26Vendor Advisory
https://www.synology.com/security/advisory/Synology_SA_20_26Vendor Advisory

Timeline

Published: Jun 23, 2021
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2021-29086?

How severe is CVE-2021-29086?

CVE-2021-29086 has a CVSS score of 7.5/10 (HIGH severity). The EPSS model estimates a 1.18% probability of exploitation in the next 30 days.

How do I fix CVE-2021-29086?

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-2021-29086?

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

Scan your code now

Source: NVD / NIST